主语从句详解
一、概述
在句子中起名词作用的各种从句统称为名词性从句.根据它们在句中的语法作用, 这类从句又可分为主语从句、同位语从句、表语从句和宾语从句.
二、主语从句主要有四类
（1）由连词that引导的主语从句:引导词that无含义/在句中不做成分/不可以省.
例如：That you will win the medal seems unlikely.
That you are so indifferent bothers me.
That she survived the accident is a miracle.
（2）用连词whether 引导的主语从句: whether有含义(是否)/在句中不做成分/不可以省. 注意：引导主语从句, 不能用if, 只能用whether.
例如：Whether we will hold a party in the open air tomorrow depends on the weather.
Whether she is coming or not doesn’t matt er too much.
（3）用连接代词引导的主语从句
在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中,
其连接代词在句中起名词性作用, 担当一定成分.
例如：What you need is more practice. What I want to know is this.
Whatever we do is to serve the people.
注：whatever / whoever的功用
whatever, whoever在主语从句中不含疑问意义.它引导主语从句, 并在从句中作主语、宾语、表语等.
whatever = anything that; whoever = anyone who.要注意和whatever, whoever引导的让步状语从句的区别.
Whoever breaks the law should be punished. （主语从句）
（＝Anyone who breaks the law should be punished. ）
Whoever breaks the law, he should be punished. （让步状语从句）
（＝No matter who breaks the law, he should be punished. ）
（4）用连接副词when, where, why, how引导名词性从句(其连接副词有含义,在句中作状语.) 例如:Where we should leave it is a problem.
When they will come hasn’t been made pubic.
三、注意点: it构成的主语从句
（1）由连词that引导的主语从句, 在多数情况下放到句子的后面, 而用代词it作形式主语. 例如：That light travels in straight lines is known to all.
=It is known to all that light travels in straight lines.
When the plane is to take off has not been announced .
= It has not been announced when the plane is to take off.
(但当what引导的主语从句表示“…的东西”时, 一般不用it作形式主语.)
错:It is a book what he wants.
对:What he wants is a book.
另外, 需要注意的是, it作形式主语代替主语从句时, 要注意和as引导的定语从句的区别.试比较：
It was reported that the US was under the terrorist attack.
As was reported, the US was under the terrorist attack.
（2）常见用it作形式主语的复合句结构
A. It is +名词+从句
It is a fact that… 事实是……
It is good news that … ……是好消息
It is a question that … ……是个问题
It is common knowledge that … ……是常识
类似的名词还有：a pity；a wonder；a good thing；no wonder；surprise等.
例如：It is a mystery to me how it all happened.
It is common knowledge that the whale is not a fish.
It is no surprise that Bob should have won the game.
It’s a pity that you missed the film.
B. It is +形容词+从句
It is necessary that … 有必要……
It is clear that … 很清楚……
It is likely that … 很可能……
It is important that … 重要的是……
类似的形容词还有：Strange; natural; obvious; true; good; wonderful; possible; unlikely; quite; unusual; certain; evident; worth-while; surprising; interesting; astonishing, etc.
例如：It is doubtful whether she will be able to come.
It was really astonishing that he refused to talk to you.
It is essential that he should be here by the weekend.
It seems obvious that we cannot go on like this.
It is necessary that you （should）master the computer.
It is important that a student learn English well.
It is likely that a hurricane will arrive soon.
需要注意的是, 这类主语从句中, 谓语动词很多为“（should）＋动词原形”, 即要用虚拟语气.
C. It is +过去分词+从句
It is said that … 据说……
It is reported that … 据报道……
It has been proved that … 已证明……
It must be pro ved that… 必须指出……
类似的过去分词还有：known; estimated; expected; believed; thought; hoped; noted; discussed; required;
decided; suggested; demanded; made clear; found out,etc.
例如：It is thought that he is the best player.
It is estimated that the vase is 2000 years old.
It is used to be thought that a new star must be due to a collision between two stars.
It has not been made clear when the new road is to be opened to traffic.
It is said that he was killed in the earthquake.
D. It seems（happened / appears / doesn’t matter / makes no difference / occurred …）that …
It seems that they will win the game.
It makes no difference whether he will attend the meeting or not.
It does not matter if I missed my train.
It happened that I saw him yesterday.
主从练习
1. _____ as much as one-fifth of all timber harvested is not used.
A. The estimate
B. The estimated
C. They are estimated
D. It is estimated that
2. _____ some mammals came to live in the sea is not known.
A. Which
B. Since
C. Although
D. How
3. _____ we have achieved is attributed to the guidance of our parents.
A. Whoever
B. Whatever
C. However
D. That
4. _____ wealthy does not necessarily mean that a man is greedy.
A. For the reason that he is
B. Just because he is
C. The reason of being
D. That he is
5. Although ___ happened in this developed country sounds like science fiction, it could occur elsewhere in the world.
A. which
B. what
C. how
D. it
6. _____ she had forgotten to take her notebook.
A. That occurred to her
B. She occurred that
C. To her that occurred
D. It occurred to her that
7. I am sure that _____ she said is wrong.
A. which
B. all
C. this
D. what
8. We lost our way in the forest, and ____ made matters worse was that it was getting dark.
A. that
B. which
C. it
D. What
9. _____ or not is still uncertain.
A. He’s coming
B. If he is coming
C. That coming
D. Whether he’s coming
10. It’s _____ he’ll be able to come.
A. doubt whether
B. doubtful
C. doubt it
D. doubtful whether
11. ______ he is at work in the heart of the big city or at home in the quiet suburb, Dick’s l ife is tied to machines.
A. Whether
B. Till
C. If
D. Unless
12. _____ he saw both surprised and frightened him.
A. That
B. When
C. What
D. Which
13. _____ is warm sunshine.
A. What do we all need.
B. What all we need
C. What we need
D. What we all need
14. _____ is a pity that he should feel so upset.
A. What
B. That
C. He
D. It
15. _____ a spoonful of soil can tell us so much about the structure and early history of the moon.
A. Remarkable
B. Quite remarkably
C. It is remarkable that
D. It is remarkable fact that
16. _____ you nominate will be elected.
A. Who
B. Whom
C. Whomever
D. That’s
17. _____ book you borrow must be returned within a week.
A. What
B. Which
C. Whichever
D. That’s
18. _____ of us gets home first starts cooking.
A. Who
B. Which
C. Whichever
D. Anyone
1.________ makes mistakes must correct them.
A. What
B. That
C. Whoever
D. Whatever
2. It worried her a bit ____ her hair was turning grey.
A. while
B. that
C. if
D. for
3.When and why he came here ________ yet.
A. is not known
B. are not known
C. has not known
D. have not known
4. ________ is no reason for dismissing her.
A. Because she was a few minutes late
B. Owing to a few minutes late
C. The fact that she was a few minutes late
D. Being a few minutes late
5. ________ Tom liked to eat was different from ________.
A. That…that you had expected
B. What …that you had expected
C. That…what you had expected
D. What…what you had expected
6.________ we go swimming every day ________ us a lot of good.
A. If...do
B. That...do
C. If...does
D. That...does
7.It ________ Bob drives badly.
A. thinks that
B. is thought what
C. thought that
D. is thought that
8.It's uncertain ________ the experiment is worth doing.
A. if
B. that
C. whether
D. how
9.________ the boy didn't take medicine made his mother angry.
A. That
B. What
C. How
D. Which
10.____ we can't get seems better than ____ we have.
A. What, what
B. What, that
C. That, that
D. That, what
11.____ you don't like him is none of my business.
A. What
B. Who
C. That
D. Whether
12..____ we'll go camping tomorrow depends on the weather.
A. If
B. Whether
C. That
D. Where
13._________is going to do the job will be decided by the Party committee.
A. That
B. Why
C. How
D. Who
14._______we'll finish translating the book depends on the time.
A. When
B. Why
C. What
D. That
15.______he won't go there is clear to all of us.
A. How
B. What
C. Why
D. This
16.______the house will be built will be discussed at tomorrow's meeting.
A. If
B. Where
C. That
D. What
17._______you come or not is up to you.
A. What
B. If
C. Why
D. Whether
18._______makes mistakes must correct them.
A. Who
B. Anyone
C. Whoever
D. Anybody
19._______team will win the match is a matter of public concern.
A. Which
B. That
C. If
D. How
20. Who is this factory __________ some foreign friends visited last Friday?
A. that
B. where
C. which
D. the one
21.Is this factory you visited the other day?
A. that
B. where
C. in which
D. the one
22.________leaves the room last ought to turn off the lights.
A. Anyone
B. The person
C. Whoever
D.Who
表语从句
1、概述
用作表语的从句叫作表语从句, 它位于主句中的连系动词之后.引导表语从句的词有从属连词that、whether、as though(if)；关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等；关系副词when, where, why, how, however, whenever, wherever等.可以接表语从句的连系动词由be, look, remain, seem等.That引导表语从句时, 在口语中, 间或可以省略.
The trouble is that we are short of money.困难是我们资金短缺.
That is why stone walls are used instead of fences around New England fields.这就是为什么在新英格兰用石头墙而不用栅栏的原因.
At that time, it seemed as if I couldn't think of the right word anyhow.当时,我似乎怎么也想不出一个恰当的字眼来.
2、由从属连词that, whether引导的表语从句.
that在引导表语从句时无词义, 而whether有词义, 意为、“是否”.这时主句的主语常常是些抽象名词, 如question(问题), trouble(麻烦), problem(问题), result(结果), chance(可能性), suggestion(建议), idea(想法), reason(理由)等.表语从句对主句主语进行说明、解释, 使主语的内容具体化.
The trouble is (that) she has lost his money. 麻烦的事是他丢了钱.
The question is whether we need more ice cream.问题是我们是否还需要一些冰淇淋.
The problem was that it was too valuable for everyday use.问题是它作为日常之用太贵重了. What she couldn’t understand was that fewer and fewer students showed interest in her l essons. 我们不能理解越来越少的学生对他的课不感兴趣.
3、由关系代词引导的表语从句.
关系代词who, what, which, whom, whose, whatever, whoever, whomever, whichever等引导表语从句, 在句中作主语、宾语、表语, 关系代词不能省略.
The question is which of us should go.问题是我们哪一个应该去.
The problem was who could do the work.问题是谁能做这项工作.
That's what he is worrying about.那就是他在担心的事.
That's what we should do.那是我们应该做的.
4、由关系副词引导的表语从句.
Go and get your coat. It's where you left it. 去把雨衣拿来.就在你原来放的地方.
I had neither a raincoat nor an umbrella. That’s why I got wet through. 我们既没伞也没雨衣, 这是我们淋湿的原因.
That is how mice ruin many stores of grain every year.那就是老鼠是怎样每年损害大量粮食的. That is what he is worried about.那就是他所担心的.
5、由连词because, as if/as though等引导的表语从句.
It looked as if it was going to snow.看起来好像要下雪了.
That's because we never thought of it.这是因为我们从未想过此事.
It see ms as if he didn’t know the answer.好像他不知道答案.
可以接表语从句的系动词有：
1：be（being,been,am,is,are,was,were)
2: feel , seem , look, appear ,sound,
taste , smell
3: stand , lie , remain ,keep, stay
4: become ,get , grow , turn ,go ,come, run,
fall
5: prove, turn out
系动词的固定搭配:
come true, fall asleep, fall ill, go bad, come right, run wild
连接词：that / whether /as if /as
though (if不引导表语从句)
连接代词：who / whom / whose / which
/ what
连接副词：when / where / why / how /
because
注：引导表语从句的连词that间或可以省略.
The truth is（that）I didn't go there. 事实是我没去那儿.
［考题1］The traditional view is ____ we sleep because our brain is “programmed” to make us do so.
A. when
B. why
C. whether
D. that
［答案］ D
［解析］下划线处之后是包含一个原因状语从句的表语从句, 如果看不出它是充当整个句子结构的表语从句将难以把握整个句子的意思.因此, 应选择可引导名词性从句且不充当任何成分的that.
［考题2］You are saying that everyone should be equal, and this is ____ I disagree.
A. why
B. where
C. what
D. how
［答案］ B
［解析］下划线处的引导词引导系动词is后的表语从句并在该表语从句中充当地点状语(“disagree”属于不及物动词, “I disagree”本身是完整的主谓结构), 下划线应填入引导词where, 表语从句“where I disagree”的意思是“我不同意之处、我不同意的地方”.
［考题3］— I drove to Zhuhai for the air show last week.
— Is that ____ you had a few days off?
A. why
B. when
C. what
D. where
［答案］ A
［解析］下划线处的引导词引导与系动词is连用的表语从句并在该表语从句中充当原因状语, 下划线应填入表示“因此……”(指因某种原因所造成的结果)的引导
词why.
［考题4］____ she couldn’t understand was ____ fewer and fewer students showed interest in her lessons.
A. What; why
B. That; what
C. What; because
D. Why; that
［答案］ A
［解析］第一个下划线处的引导词引导主语从句并在该主语从句中充当宾语, 特指她所不理解的事情, 应填入关系代词型的引导词what；第二个下划线处表示“因此……”(指因某种原因所造成的后果, 由why引导对应的名词性从句)而不是“为什么……”(指原因、理由, 由because引导对应的名词性从句), 应填入引导词why.
［考题5］____ made the school proud was ____ more than 90% of the students had been admitted to key universities.
A. What; because
B. What; that
C. That; what
D. That; because
［答案］ B
［解析］第一个下划线处的引导词引导主语从句并在该主语从句中充当主语, 特指令校方骄傲的事情, 应选用关系代词型的引导词what；第二个下划线处引导表语从句表示原因、理由, 应由that引导对应的名词性从句.
［考题6］—Are you still thinking about yesterday’s game?
—Oh, that’s ____.
A. what makes me feel excited
B. whatever I feel excited about
C. how I feel about it
D. when I feel excited
［答案］ A
［解析］A选项的意思是“令我感觉激动的事物”；B选项的意思是“我觉得激动的任何事物”；C选项的意思是“我对它感觉的方式”；D选项的意思是“令我感觉激动的时间”.四个选项中A最适合跟代表“game”的主语that对应, 充当表语从句.
表语从句与宾语从句的关系
不属于的
宾语从句和表语从句都属于名词性从句.其作用跟名词在句中的作用相同.故充当宾语的句子叫宾语从句, 充当表语的句子叫表语从句.
宾语从句
(1)对于宾语从句要掌握以下三点
①语序: 从句的语序必须是陈述句语序, 即“主语+ 谓语”这种形式.
②时态: 当主句是一般现在时或一般将来时的时候, 从句可以是任何时态, 而当主句是一般过去时的时候, 从句, 从句时态必须是过去时范围的时态, 即(一般过去时, 过去进行时, 过去完成时, 过去将来时).
③连接词: 当从句意思完整, 主句意思肯定时, 连接词用that, 且可以省去, 当从句意思完整, 主句意思不确定或含否定含意时, 常用if或whether(是否), 当从句意思不完整时, 连接词则是代替不完整部分的特殊疑问词.
表语从句
在句子中起表语作用的从句叫做表语从句, 位于主句系动词的后面.表语从句的引导词和主语从句的引导词相同.也是名词性从句的一种.
如：What the police want to know is when you enred red the room警察想知道的是你什么时候进的房间.
The The trouble is that we are short of funds困难是我们缺乏资金.
This This is what we should do这是我们应当做的.
That”s s why I want you to work there那就是我要你在那儿工作的原因.
His His first question was whether Mr. Smith had arrived yet他的第一个问题是史密斯先生到了没有.
注意：从句中的疑问句用正常语序, 即陈述语序.
as as if, as though, becau也可用来引导表语从句.
She She seems as if she had done a great thing她看起来好像做了一件大事.
It It is because you eat too much那是因为你吃得太多了.
表从练习
一
1. The question is ________ we will have our sports meet next week.
A. that
B. if
C. when
D. whether 2．The reason why he failed is ________he was too careless.
A. because
B. that
C. for
D. because of
3. Go and get your coat. It’ s ________you left it
A. where
B. there
C. there where
D. where there 4．The problem is _________to take the place of Ted
A. who can we get
B. what we can get
C. who we can get
D. that we can get
5. What I want to know is ______ he likes the gift given by us.
A. that
B. if
C. whether
D.不填
6. The reason is_________I missed the bus.
A. that
B. when
C. why
D. what
7. That is __ ___ we were late last time.
A. that
B. when
C. why
D. what
8. She looked _________ she were ten years younger.
A. that
B. like
C. as
D. as though
9.—I fell sick!
--I think it is _______ you are doing too much.
A. why
B. when
C. what
D. because
10. The reason why he hasn’t come is ___________.
A. because his mother is ill
B. because of his mother’s being ill
C. that his mother is ill
D. for his mother is ill
11. —He was born here.
-- That is _______ he likes the place so much.
A. that
B. what
C. why
D. how
12.That is ______ Lu Xun once lived.
A. what
B. where
C. that
D. Why
二
1．_______your father wants to know is________ getting on with your studies.
A. What; how are you
B. That；how you are
C. How；that you are
D. What；how you are
2. The trouble is__________we are short of tools.
A. what
B. that
C. how
D. why that
3. America was __________was first called “India” by Columbus.
A. what
B. where
C. the place
D. there where
4. China is becoming stronger and stronger. It is no longer_________ .
A. what it used to be
B. what it was used to being
C. what it used to being
D. what it was used to be
5. ________he really means is ________he disagrees with us.
A. What … that
B. That … what
C. What … what
D. That … what
6. The energy is ________ makes the cells able to do their work.
A. that
B. which
C. what
D. Such
三
1. I drove to Zhuhai for the air show last week .
—Is that_____ you had a few days off？
A. why B .what C. when D. where
2. I had neither a raincoat nor an umbrella ____I got wet through.
A. It’s the reason
B. That’s why
C. There’s why
D. It’s how
3. See the flags on top of the building? That was ______ we did this morning.
A. when
B. which
C. where
D. what
4. --- Are you still thinking about yesterday’s game?
---Oh, that’s _____.
A. what makes me feel excited
B. whatever I feel excited about
C. how I feel about it
D. when I feel excited
5. What surprised me was not what he said but ______ he said it.
A. the way
B. in the way that
C. in the way
D. the way which
1.The question is ________ we will have our sports meet next week.
A. that
B. if
C. when
D. whether 2．The reason why he failed is ________he was too careless.
A. because
B. that
C. for
D. because of
3. Go and get your coat. It’ s ________you left it
A. where
B. there
C. there where
D. where there 4．The problem is _________to take the place of Ted
A. who can we get
B. what we can get
C. who we can get
D. that we can get
5. What I want to know is ______ he likes the gift given by us.
A. that
B. if
C. whether
D.不填
6. The reason is_________ I missed the bus.
A. that
B. when
C. why
D. what
7. That is __ ___ we were late last time.
A. that
B. when
C. why
D. what
8. She looked _________ she were ten years younger.
A. that
B. like
C. as
D. as though
9.—I fell sick!
--I think it is _______ you are doing too much.
A. why
B. when
C. what
D. because
10. The reason why he hasn’t come is ___________.
A. because his mother is ill
B. because of his mother’s being ill
C. that his mother is ill
D. for his mother is ill
11. —He was born here.
-- That is _______ he likes the place so much.
A. that
B. what
C. why
D. how
12.That is ______ Lu Xun once lived.
A. what
B. where
C. that
D. why 13．_______your father wants to know is________ getting on with your studies.
A. What; how are you
B. That；how you are
C. How；that you are
D. What；how you are
14. The trouble is__________ we are short of tools.
A. what
B. that
C. how
D. why that
15. America was __________was first called “India” by Columbus.
A. what
B. where
C. the place
D. there where
16. China is becoming stronger and stronger. It is no longer_________ .
A. what it used to be
B. what it was used to being
C. what it used to being
D. what it was used to be
17. ________he really means is ________he disagrees with us.
A. What … that
B. That … what
C. What … what
D. That … what
18. The energy is ________ makes the cells able to do their work.
A. that
B. which
C. what
D. such
19 —I drove to Zhuhai for the air show last week.
—Is that_____ you had a few days off？
A. why B .what C. when D. where
20 .I had neither a raincoat nor an umbrella ____I got wet through.
A. It’s the reason
B. That’s why
C. There’s why
D. It’s how
21. See the flags on top of the building? That was ______ we did this morning.
A. when
B. which
C. where
D. what
22. --- Are you still thinking about yesterday’s game?
---Oh, that’s _____.
A. what makes me feel excited
B. whatever I feel excited about
C. how I feel about it
D. when I feel excited
23. What surprised me was not what he said but ______ he said it.
A. the way
B. in the way that
C. in the way
D. the way which
综合练习
1. It has been proved _________ eating vegetables in childhood helps to protect you against serious illnesses in later life.
A. if
B. because
C. when
D. that
2. The last time we had great fun was ________ we were visiting the Water Park.
A. where
B. how
C. when
D. why
3. ________ matters most in learning English is enough practice.
A. What
B. Why
C. Where
D. Which
4. The traditional view is ______ we sleep because our brain is “programmed” to make use do so.
A. when
B. why
C. whether
D. that
5. ______ parents say and do has a life-long effect on their children.
A. That
B. Which
C. What
D. As
6.________ is our belief that improvements in health care will lead to a stronger, more prosperous economy.
A. As
B. That
C. This
D. It
7. ______ team wins on Saturday will go through to the national championships.
A. No matter what
B. No matter which
C. Whatever
D. Whichever
8. You are saying that everyone should be equal, and this is ______ I disagree.
A. why
B. where
C. what .D how
9. After Yang Liwei succeeded in circling the earth, ____ our astronauts desire to do is walk in space.
A. where
B. what
C. that
D. how
10. I think Father would like to know ______ I’ve been up to so far, so I decide to send him a quick note.
A. which
B. why
C. what
D. how
11. Our country is developing at an amazing speed, and this is ______ makes me feel so proud.
A. what
B. which
C. that
D. why
12. ________ puzzles the scientists how these creatures can survive in such severe conditions.
A. What
B. As
C. That
D. It
13. _____ leaves the room last ought to turn off the lights.
A. Anyone
B. Who
C. Whoever
D. The person
14. Inside the White House, there is a room called the Oval Office. That’s _______ the president works.
A. whey
B. when
C. what
D. where
15. ______ you will be admitted to York University will be decided by the Admission Committee.
A. That
B. Whether
C. What
D. If
16. The reason ____ I plan to go is _____ she will be disappointed if I don’t.
A. why; that
B. that; because
C. which; because
D. why; for
17. We sell handmade gifts. _____gift you order from us is unique for the special person!
A. Which
B. That
C. Whichever
D. What
名词性从句---主语从句 1. What is needed for the space trip is careful preparation. 2. Her wish is that she can lose weight soon. 3. I think that woman can reach every high achievements in many fields of science. 4. We were very excited at the news that our team had won. 引导名词性从句的关联词可分为三类： 一．从属连词：that（无任何词意） whether, if（均表示“是否”表明从句内容的不确定性） as if ,as though（均表示“好像”，“似乎”）以上在从句中均不充当任何成分二．连接代词：what, who, whom, which，whose, whatever, whoever, whichever(作主宾表定) 三．连接副词：when, where, how, why(作状语) I.主语从句 1.定义：在句子中担当主语的是一个从句,这个从句就叫做主语从句。 2.位置：主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it 代替，而本身放在句子末尾。 3.引导主语从句的关联词： (1)从属连词that,whether,if (在从句中不充当成分，仅起连接作用) That Jack won the match yesterday surprised us. Whether he’ll come here isn’t clear. (此处不能用if) (2)连接代词who, whom, whose, what, which, whoever, whatever, whichever(充当主宾表定) What she did is not known. Whoever comes is welcome. (3)连接副词where,when,how,why(在从句中充当状语) How this happened is not clear to anyone. When the meeting will be held is decided by our manager. 4.有时为了避免头重脚轻，常用it作形式主语，而把真正主语放在句子末尾。 How the book will sell depends on its author. = It depends on its author how the book will sell. That he is the best student in the class is obvious. = It is obvious that he is the best student in the class. 用it作形式主语的几种常见结构： (1) It is ＋名词＋从句 It is a fact that … 事实是… It is an honor that …非常荣幸 It is common knowledge that …是常识 (2) It is ＋形容词＋从句 It is natural that… 很自然It is strange that… 奇怪的是… (3) It is ＋不及物动词＋从句 It seems that… 似乎… It happened that… 碰巧… It ap pears that… 似乎… (4) It ＋过去分词＋从句
高中英语语法主语从句 第一节主语从句 1．考点解析。 1．主语从句一般分为三类：由what等代词引导的主语从句；由连词that 引导主语从句，多数情况下由it作形式主语，that从句放到句子后面去；由连接代词或连接副词（或whether）引导的主语从句。 What they are after is beauty. It is not your fault that we can’t arrive on time. When they will arrive has not been decided. 2. 由关系代词what引导的主语从句，也可由whatever（“所…的一切”）或 whoever（“一切…的人”）引导。 Whatever he wants is your support. Whoever comes will be welcome. 3. 大多数主语从句都可用it代替，作形式主语，把主语从句放在句尾。要注意it代替主语从句和it引导的强调句的区别。强调句的结构是it is/was….+that…，强调人是可把that 换做who，whom，whose。如强调的是状语时，也只能用that,而不能用when, where, how, why等。 It was in Paris that they fell in love with each other. It is the lady who was my English teacher. It was last semester that he won the first prize. 2. 试题详解。 1．______ he needs is more experience. A. Who B. That C. What D. How 2.It was because of the heavy snow ______ the train was late. A. why B. that C. so D. thus 3．It doesn’t matter ______ he likes or not. A. whether B. what C. when D. that 4______ he has won the Noble Prize has been proved to be true. A. What B. How C. It D. That 5．What he wants _______ to sleep more. A. are B. have been C. is D. were 6．______ we can begin this investigation is still a question. A. When B. Why C. What D. That 7．It is ______ that the highway will be open to traffic nest year. A. report B. reported C. reporting D. by report 8．______ fails to see this will make a big mistake. A. Whatever B. what C. wherever D. Whoever 9．It is a mystery _____ the prisoner escaped. A. why B. how C. what D. that 10．It was last summer _____ he graduated from the college. A. that B. when C. / D. where 3. 实战演练。 1. We didn’t know ______ she didn’t come. A. why B. that C. when D. it 2. It is still doubtful _______ she would play the part.
名词性从句用法详解 一、概说名词性从句，即指性质相当于名词的从句，它包括主语从句、宾语从句、表语从句和同位语从句。从高考的考查的实际情况来看，名词性从句考得最多的是宾语从句，其次是主语从句，再次是表语从句，而同位语从句则很少考查。 二、名词性从句的一般引导词 1. 连接词 that 只起连接作用，没有任何意思，也不充当句子成分，在宾语从句中可省略，但引导其他名词性从句时通常不省略。如： I hope (that) you enjoy your holiday. 希望你假期过得好。（宾语从句可省） That he likes you is very obvious. 很显然他喜欢你。（That引导主语从句不能省） 2. 连接词 whether 也不充当句子成分，但有自己的意思，表示“是否”；引导宾语从句时，可换成 if，但引导其他名词性从句时不能换成 if。 He asked whether [if] I would show him the way. 他问我是否可以给他带路。 Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。(引导主语从句，不能用 if 代替 whether) 3.连接代词 who(m), whose, which, what 等，均有各自的意义，在从句中作主语、宾语、定语等。如： That’s why she wanted to leave. 这就是她想离开的原因。 When we arrive doesn't matter. 什么时候到没有关系。 Tell me which one you like best. 告诉我你最喜欢哪一个。 4.连接副词 when, where, why, how 等，也各自有自己的意义，在从句中作状语。如： The question is how we should carry out the plan. 问题是怎样执行这个计划。 When she’ll be back depends much on the weather. 她什么时候回来在很大程度上要看天气。 Why he did it will remain a puzzle forever. 他为什么这样做将永远是一个谜。 三、名词性从句的重要引导词 1. what 用于引导名词性从句是一个十分重要的引导词，它可引导主语从句、宾语从句和表语从句，但不用于引导同位语从句。它引导的名词性从句有两个意思是：一是表示“什么”，带有疑问意味；二是表示“…所…的”，相当于一个先行词后接一个关系代词。 如： I don’t know what you want. 我不知道你想要什么。 I don’t know what you want is this. 我不知道你所想要的是这个。 2. whoever, whatever, whichever 等也可引导名词性从句，其意分别为“所…的一切事或东西”、“任何…的人”、““…的任可人或物”等。如： Whoever wants the book may have it. 任何人要这书都可拿去。 I’ll do whatever I can to help him. 我们将尽我们所能来挽救他。 注意以下受汉语意思影响而弄错的句子： 任何人来都欢迎。 误：Who comes will be welcome. / Anyone comes will be welcome. 正：Whoever comes will be welcome. / Anyone who comes will be welcome. 另外，它们也可引导让步状语从句，其意为“无论…”、“不管…”，其意相当于no matter who [what, which]。如： Whatever happens, you must be calm. 不管发生什么情况，你都必须镇静。(whatever = no matter what)
语法要点剖析 一、名词性从句 主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词。因此，这四种从句通称为名词性从句。 引导名词性从句的连接词可分为三类： 连接词：that, whether, if （不充当从句的任何成分） 连接代词：what, whatever, who, whoever, whom, whose, which. 连接副词：when, where, how, why 1. 主语从句 作句子主语的从句叫主语从句。主语从句通常由从属连词that，whether，if 和连接代词what，who，which，whatever，whoever以及连接副词how，when，where，why等词引导。that在句中无词义，只起连接作用；连接代词和连接副 词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。例如： What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。 It is known to us how he became a writer. 我们都知道他是如何成为一名 作家的。 Where the English evening will be held has not yet been announced. 英语晚会将在哪里举行，还没有宣布。 有时为避免句子头重脚轻，常用形式主语it代替主语从句作形式主语放于句首，而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下： （1）It + be + 名词+ that从句（2）It + be + 形容词+ that从句 （3）It + be + 动词的过去分词+ that从句（4）It + 不及物动词+ that 从句 另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should) +do”，常用的句型有： It is necessary (important, natural, strange, etc.) that … It is a pity (a shame, no wonder, etc.) that… It is suggested (requested, proposed, desired, etc.) that… 2. 宾语从句 名词句用作宾语的从句叫宾语从句。引导宾语从句的关联词与引导主语从句表语从句的关联词大致一样，在句中可以作谓语动词或介词及非谓语动词的宾语。 1. 由连接词that引导的宾语从句 由连接词that引导宾语从句时，that在句中不担任任何成分，在口语或非正式的文体中常被省去，但如从句是并列句时,第二个分句前的that不可省。例如：He has told me that he will go to Shanghai tomorrow.他已经告诉我他明天要去 上海。 We must never think (that) we are good in everything while others are good in nothing. 我们决不能认为自己什么都好，别人什么都不好。
xx考研英语语法复习主语从句 在复合句中充当主语成分的句子叫作主语从句。具体形式为：引导词引导一个从句作主语;或者it作形式主语+谓语/系表结构+引导词+从句。 ⑴陈述句充当主语从句，连词为that(that没有实际含义，在从句中只起连接作用，不在从句中作任何语法成分)，从句为"that+陈述句"，that不能省略。 【例句】 That Chris Lee won the champion of Super Girl in xx arouse wide public concern. 李宇春赢得xx年超女冠军这件事引起了社会的广泛关注。 ⑵一般疑问句充当主语从句，连词为whether(whether"是否"的含义，在从句中只起连接作用，不在从句中作任何语法成分)，从句为"whether+陈述句语序"，whether不能省略。 【例句】 Whether this is true or not remains a mystery. 这是对是错还是个谜。 ⑶特殊疑问句充当主语从句，连词为特殊疑问词(特殊疑问词都有自己的含义，在从句中作一定的语法成分)，从句为"特殊疑问词+陈述句语序"，特殊疑问词不能省略。 【例句】 例1 --what
What caused the aident remains unknown. 是什么引起了这一事故仍然。 例2--where Where my wife and I should enjoy our honeymoon is still unsettled. 我太太和我应该去哪享受我们的蜜月还没有最后决定。 例3 --which Which university I should choose to continue my further education is a question of great importance. 我应该考哪个大学的研究生是个很重要的问题。 例4--when When and where the test will be given is not yet decided. 什么时候在什么地方进行考试还没定下来。 例5---ever Whoever gets the job will have a lot of work to do. 任何得到这份工作的人都将要有很多工作要做。 例6--how How we can protect the grain from damp needs to be discussed. 我们怎样才能保护粮食不受潮需要讨论讨论。 3.It句型
高考英语主语从句 定义：用作主语的从句叫主语从句，它是名词性从句之一。主语从句的时态：不受主句的时态影响和限制。引导主语从句的连接词有： 从属连词: that, whether； 连接代词: who (whoever), whom, whose, what (whatever)和which (whichever)； 连接副词: when, where, how和why。 连接词： 1. 从属连词：that，whether 1）that引导主语从句只起引导作用，在主语从句中不充当任何成分，that本身无实际意义，但不能省略。2）whether意为“是否”，放在句首句末皆可。由whether引导的名词从句做主语，表语，介词宾语，同位语时！不可用if代替。 a.That price will go up is certain. b. Whether they would support us was a problem. 他们是否会支持我们还是一个问题。 2. 连接代词who ，what ，which, whatever, whichever, whoever (Who, whom, which, what可以和ever构成合成词，和what一样引导从句，ever起到强调作用。此类主语从句不能用形式主语it引导，它们在句子中担任成分，不能省略，语序为陈述语序，既有疑问含义,又起连接作用,同时在从句中充当各种成分。 Which side will win is not clear. Whoever breaks the law will be punished. Whatever he did is right. Who killed the scientist remains a question. 1）What和that引导的主语从句的区别：that 只起引导作用，不充当任何成分，没有意思。What 不仅起引导作用，还要充当一定成分(主语、宾语或表语)，意思是：“什么”。 What we need is money. That he will come is certain. 2）whatever / whoever的用法（~ever=no matter ~---让步状语从句中） whatever / whoever可以引导主语从句,并在句中作主语、宾语、表语等,不含疑问意义。whatever相当于anything that; whoever 相当于anyone who。例如: Whoever(Anyone who) wants to enter into this school must take the exam. Whatever(Anything that) she did was right. 3. 连接副词when，where，how，why等。既有疑问含义,又起连接作用,同时在从句中充当各种成分。How this happened is not clear to anyone. When he will be back depends on the weather. When we’ll start tomorrow will be told soon. Where the test will be given is not yet decided. 4. 主语从句后置：为了避免主语冗长,句子头重脚轻,经常用it 作形式主语,主语从句放在后面作真正的主语. 例: That we shall be late is certain. -- It’s certain that we shall be late. 1）用it 作形式主语的结构 A. It + be + 形容词+ that 从句 (obvious, true, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.) 如：It is certain that she will do well in her exam. B. It + be + 名词词组+ that 从句(an honour, a fact, a pity, etc）如： It is a pity/shame that... 遗憾的是…… It is a surprise that…令人惊奇的是… It is a fact that… …是事实It is common knowledge that… …是常识 It’s a pity that we can’t go. C. It + be + 过去分词+ that 从句(said, reported, thought, expected, decided, announced, etc。）如：It is said that Mr. Green has arrived in Beijing. D. It + 不及物动词或短语+ that 从句( seem，happen, doesn’t matter ,turn out）。如： It happened that I was out that day. It doesn’t matter whether she will come or not. 2) 对于以连接代词(副词)引导的主语从句,可以使用形式主语代主语从句,也可直接在句首使用主语从
主语从句详解 一、概述 在句子中起名词作用的各种从句统称为名词性从句.根据它们在句中的语法作用, 这类从句又可分为主语从句、同位语从句、表语从句和宾语从句. 二、主语从句主要有四类 （1）由连词that引导的主语从句:引导词that无含义/在句中不做成分/不可以省. 例如：That you will win the medal seems unlikely. That you are so indifferent bothers me. That she survived the accident is a miracle. （2）用连词whether 引导的主语从句: whether有含义(是否)/在句中不做成分/不可以省. 注意：引导主语从句, 不能用if, 只能用whether. 例如：Whether we will hold a party in the open air tomorrow depends on the weather. Whether she is coming or not doesn’t matt er too much. （3）用连接代词引导的主语从句 在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中, 其连接代词在句中起名词性作用, 担当一定成分. 例如：What you need is more practice. What I want to know is this. Whatever we do is to serve the people. 注：whatever / whoever的功用 whatever, whoever在主语从句中不含疑问意义.它引导主语从句, 并在从句中作主语、宾语、表语等. whatever = anything that; whoever = anyone who.要注意和whatever, whoever引导的让步状语从句的区别. Whoever breaks the law should be punished. （主语从句） （＝Anyone who breaks the law should be punished. ） Whoever breaks the law, he should be punished. （让步状语从句） （＝No matter who breaks the law, he should be punished. ） （4）用连接副词when, where, why, how引导名词性从句(其连接副词有含义,在句中作状语.) 例如:Where we should leave it is a problem. When they will come hasn’t been made pubic. 三、注意点: it构成的主语从句 （1）由连词that引导的主语从句, 在多数情况下放到句子的后面, 而用代词it作形式主语. 例如：That light travels in straight lines is known to all. =It is known to all that light travels in straight lines.
在句子中起名词作用的句子叫名词性从句。名词性从句的功能相当于名词词组，它在复合句中能担任主语、宾语、表语、同位语等，因此根据它在句中不同的语法功能，名词性从句又可分为主语从句、宾语从句、表语从句和同位语从句。今天我们就来重点讲一下其中的主语从句。 在复合句中充当主语成分的句子叫作主语从句。它的具体表现形式是：引导词引导一个从句作主语；或者it作形式主语+谓语/系表结构+引导词+从句。 【例1】that That Chris Lee won the champion of Super Girl in 2005 arouse wide public concern.李宇春赢得2005年超女冠军这件事引起了社会的广泛关注。 【例2】what What caused the accident remains unknown.是什么引起了这一事故仍然未知。 【例3】where Where my wife and I should choose to continue my further education is a question of great importance.我太太和我应该去哪享受我们的蜜月还没有最后决定。 【例4】which Which university I should choose to continue my further education is a question of great importance.我应该考哪个大学的研究生是个很重要的问题。 【例5】when When and where the test will be given is not yet decided.什么时候在什么地方进行考试还没定下来。 【例6】-ever Whoever gets the job will have a lot of work to do.任何得到这份工作的人都将要有很多工作要做。 【例7】how How we can protect the grain from damp needs to be discussed.我们怎样才能保护粮食不受潮需要讨论。 【例8】whether Whether this is true or not remains a mystery.这是对是错还是个谜。 It句型 有的时候主语从句过长，根据人类短暂记忆规律，主语过长会影响理解和阅读，往往会用it作形式主语，而把真正的主语放在句尾，加以强调，是为it句型。 【例】 It is a pity that we won’t be able to go to the south to spend our summer vacation.我们不能去南方度过我们的暑假很遗憾。 为表示强调，常以形式主语it引导从句。It+谓语+引导词+从句。由于主语从句一般被认为是单数形式，形式主语代表真正的主语，因此要用it。因此形式主语的谓语动词、be动词+表语均为第三人称单数形式或过去式。 英国桂冠诗人约翰·梅斯菲尔德说：“快乐的日子使人睿智。”很多考生可能觉得这句话应该反过来说，但其实复习过一段时间以后，面对着越来越复杂的难题，你就会发现，保持快乐的心态，复习效率自然而然就会提高。
宾语从句用法详解 在句子中起宾语作用的从句叫做宾语从句。宾语从句分为三类：动词的宾语从句，介词的宾语从句和形容词的宾语从句。 一、宾语从句用法 宾语从句的时态： 1．主句用一般现在时，从句可用任意时态。可归纳为“主现从不现” 2．主句用过去时，从句用过去某个时态。可归纳为“主过从句过” 3．主句用过去时，从句是科学真理、客观常识、名人格言时用一般现在时。 4．情态动词could/would用于，“请求”，表示委婉、客气的语气时，从句不受主句的约束。 宾语从句的连接词 从属连词 连接宾语从句的从属连词主要有that, if, whether. that引导表示陈述句的宾语从句， if和whether，whether...or not引导表示“是否”的一般疑问句的宾语从句. He told me (that ）he would go to college the next year 他告诉我他明年上大学. I don’t know if there will be a bus any more. 我不知道是否还会有公交车. Nobody knew whether he could pass the exam. 没有人知道他是否会通过考试. who,whom,whose,what,whoever,whomever,whosever,whatever,whichever等. 连接代词一般指疑问，但what,whatever除了指疑问外，也可以指陈述. Do you know who has won Red Alert game 你知道是谁赢得了红色警戒的游戏么？ The book will show you what the best CEOs should know. 这本书会告诉你最好的执行总裁该了解什么. Have you determined whichever you should buy, a Motorola or Nokia cell phone
主语从句：即在复杂句中充当主语成分的句子 例如"That he finished writing the composition in such a short time surprised us all"，他在很短的时间内写完作文让我们都很惊讶, 此复合句主要描述的是某事让我们惊讶，某事就是该复合句的主语，因此"That he finished writing the composition in such a short time" 便是该复合句的主语从句。 主语从句使用陈述语序，其通常结构为“引导词+ 主语+ 谓语+ 其他成分”；但当连接代词同时充当从句主语时，其结构为“连接代词+ 谓语+ 其他成分”。 时态：主语从句的时态不受主句时态的影响和限制 引导主语从句的连词主要有: 从属连词:that、whether （只起连接作用，不充当句子成分） 连接代词:who、whoever、whom、whose、what 、whatever 、which 、whichever （既有连接作用，又做从句的主语、宾语、表语或定语） 连接副词:when、where 、how 、why whenever、wherever（既有连接作用，又做从句的状语） 例句： 1. that引导
例句：That you are coming to London is the best news I have heard this long time. 你将来伦敦是好久以来我听到的最好消息。 2. whether引导 例句：Whether they would support us was a problem. 他们是否会支持我们还是一个问题。 3. 连接代词引导 例句：Whoever is top from wins the game when two matched players meet. 两强相争勇者胜。 4. 连接副词引导 例句：How this happended is not clear to anyone. 这件事怎样发生的，谁也不清楚。 5. what引导 例句：What struck me was that they have all suffered a lot. 给我很深印象的是他们都受过很多苦。 一、形式主语it 有时为了考虑句子平衡，避免句子头重脚轻,通常在主语从句处使用形式主语it，而将真正的主语从句移至句末。 常用句型如下： (1)It + be + 形容词+ that 从句
高二年级语法要点剖析（李翌洋） 一、名词性从句 主语从句、表语从句、宾语从句、同位语从句，在整个句子中所起的作用，相当于一个名词。因此，这四种从句通称为名词性从句。 引导名词性从句的连接词可分为三类： 连接词：that, whether, if （不充当从句的任何成分） 连接代词：what, whatever, who, whoever, whom, whose, which. 连接副词：when, where, how, why 1. 主语从句 作句子主语的从句叫主语从句。主语从句通常由从属连词that，whether，if 和连接代词what，who，which，whatever，whoever以及连接副词how，when，where，why等词引导。that在句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。 例如： （1）What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。 It is known to us how he became a writer. 我们都知道他是如何成为一名作家的。 Where the English evening will be held has not yet been announced. 英语晚会将在哪里举行，还没有宣布。 注意：有时为避免句子头重脚轻，常用形式主语it代替主语从句作形式主语放于句首，而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下： （1）It + be + 名词+ that从句 （2）It + be + 形容词+ that从句 （3）It + be + 动词的过去分词+ that从句 （4）It + 不及物动词+ that 从句 另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should) +do”，常用的句型有： It is necessary (important, natural, strange, etc.) that … It is a pity (a shame, no wonder, etc.) that… It is suggested (requested, proposed, desired, etc.) that…
Simple sentence Compound sentence Complex sentence 从句：名词性从句（主语从句，宾语从句，表语从句，同位语从句） 形容词性从句(定语从句) 副词性从句（状语从句） 英语中六大从句用法总结 在句子中起名词作用的各种从句，统称为名词性从句 1.主语从句subjective clause 一般由what, who, which, why, how, when, which, whether…or…等引导，如果从句较长，谓语又较短，可用it作形式主语，而将从句放在句末。常见的句型有： It is self-evident that… 很明显的是 It goes without saying that… 不用说 It is asserted that．．．有人主张…… It is believed that．．．据信…… It is generally considered that．．．人们普遍认为…… It is hoped that．．．人们希望…… It is reported that．．．据报道…… It is said that．．．据说…… It is supposed that．．．据推测．．．
It is well-known that．．．众所周知…… It must be admitted that．．．必须承认…… It cannot be denie d that… 不可否认…… It must be pointed out that．．．需指出的是…… It was told that．．．据传…… It will be said that．．．有人会说…… It follows that… 由此可见 It is inappropriate that… ……是不合适的 2)what引导的主语从句表示“...的东西时”，一般不用it作形式主语。 What we lack is experience. 3)what, who, when, why, whether等词含有各自的疑问意义，但它们引导的主语从句，都用陈述语序。 How the plan is to be carried out should be discussed again. I did know why I felt like crying. 2.宾语从句objective clause 1）宾语从句可位于及物动词、介词和某些形容词后。连词that常可省略。介词后一般接疑问词引导的宾语从句。in
主语从句 一、概念：在复合句中起主语作用得从句叫主语从句。 （一）连接词 从属连词：that、whether； 关系代词：who, what, which , whom, whose, whatever, whoever, whomever, whichever； 关系副词：when, where, how, why, however, whenever, wherever等； 例：What he said is true、 That you don’t like him is none of my business、 Whether the football game will be played depends on the weather、 主语从句得时态：不受主句得时态影响与限制。 （1）______ he finished writing the composition in such a short time ______(惊讶) us all、（2）______we will go for an outing tomorrow ______（remains，remained）unknown、（3）______ will be our monitor ______(be) decided yet、 （4）______we must study for ______ (be) a question of great importance、 （5）______ caused the accident ______（remains，remained）unknown、 （6）______ you did ______ (be)right、 （7）______ watch ______(be) lost is unknown、 （8）______we need ______(be) time、 （9）______ we need ______(be) good doctors、 小结: （1)主语从句得时态：不受主句得时态影响与限制。 （2)连词位于句首不能省略（3)主语从句大多数情况下视为三单,但也有例外,如例9 1、从属连词that，whether引导得主语从句。 从属连词that，whether在主语从句中得作用只就是引导主语从句，在从句中不担任成分，不能省略。 例：__________ they will go is certain、 __________ she will come or not is still a question、 __________ she's coming or not doesn't matter too much、 2、it作形式主语引导主语从句。 如果主语从句太长，为避免句子结构头重脚轻，我们可用it作形式主语，而把主语从句放在主句谓语部分之后。That引导得主语从句可用it代替，that 不可省略。 用作it作形式主语得结构： （1）It is/was +形容词+that 从句 It’s natural that…很自然……It’s obvious that …显而易见…… It’s fortunate that …幸运得就是It’s (im)possible…（不）可能…… It’s unlikely that…不可能It’s strange that…奇怪得就是…… （2）It is/was +名词+that 从句 It’s a pity that…遗憾得就是……It’s a fact that …事实就是…… It’s good news that…就是好消息……It’s a wonder that…不足为奇…… It’s an honour that…非常荣幸……It’s a shame that…真就是可耻…… It’s common knowledge that …就是常识… （3）It +不及物动词+that 从句 It seems that…似乎……It happened that…碰巧…… It appears that…瞧来……It turns out that…结果…… （4）It is/was +过去分词+that 从句 It’s not known that………不得而知It’s said that…据说……