主语从句
导入：观察并指出句子成分
A tree has fallen across the road.
You are a student.
To find your way can be a problem.
Smoking is bad for you.
一．概念：
主语：主语是指句子谈论的主题，说明的人或事物。也就是句中动作、行为、性质和状态的主体，一般位于句首
主语从句：在句中充当主语的从句
二·基本结构
关系词简单句谓语动词宾语同位语
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
三关系词(引导词)
1．从属连词：that whether
that 引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。
That she left him cut him to the heart.
That he will come is certain.
注意：有时为了使句子结构平衡, 避免“头重脚轻”, 常用it 作形式主语, 而把从句放在后面。E.g
That she has made such a mistake is a pity.
It is a pity that she has made such a mistake.
这样就构成了下面一些常用句型:
1) It is + adj. +从句
It is necessary that… 有必要…
It is important that …. 重要的是…
It is obvious that…… 很明显……
2) It +不及物动词+从句
It seems/appears that... 似乎……
It happened that... 碰巧……
It occurred to me that…… 我突然想起……
3) It + be +过去分词+从句
It is said that... 据说……
It is known to all that... 众所周知……
It is reported that... 据报道……
It is believed that... 据信……;人们相信……
It is suggested that... 有人建议……
It must be pointed out that... 必须指出……
It has been proved that... 已证明…….
4) It is + n. +从句
It is common knowledge that… …是常识
It is a surprise that …. 令人惊奇的是…
It is a fact that…… 事实是……
由whether及其他连词引导的主语从句放在句首，句后都可。
Whether it will please them is hard to say.
It is hard to say whether it will please them.
2.连接代词：who whoever whom whose what whatever which whichever What seems easy to some people seems difficult to others.
Which side will win is not clear.
注意：what 与that 在引导主语从句时的区别
what 引导主语从句时在从句中充当句子成分, 如主语、宾语、表语, that 则不充当任何成分无意义。
例如：What you said yesterday is right.
That she is still alive is a consolation
1一个句子作主语时，主句的谓语动词应为单数。
Eg Whether he will come depends on the weather.
2 what 引导的句子作主语时，谓语动词的数由句子的内容决定（即由表语决定)。
What I want is money.
What we need are good books
What he said is reasonable.
What we will do hasn’t been decided.
3 Where he was born and where he lives now are not clear.
Where and when he was born remains a secret.
两个或两个以上的主从联合做主语，主句谓语动词应为复数。
两个或两个以上的连词引导一个从句，主句谓语动词应为单数。
4 Whether he will come isn’t clear. (不能换成if)
It isn't clear whether /if he will come. (可以与if进行替换)
（if不能置于句首）
5. It 作形式主语和it引导强调句的比较
①主语从句常用it作形式主语，一般常用句型为：It is+{名词/形容词/过去分词}+主语从句例如：
It is still a question whether she will come or not.
It is strange that you should like him.
It is still unknown which team will win the match.
另外，还有一些比较多见的结构：
It turned out that……;
It has been proved that……;
It happened/occurred that……;
It is well-known that……等等
②而强调句则不同，它的结构是：It+be+被强调部分+that+从句
强调主语：It is the times that produce their heroes.时势造英雄
强调宾语：It is English that Prof.Lin teaches us.
强调状语：It was in shanghai that I saw the film.
判断是否是强调句有一个方法，就是将that以后的“句子的其余部分”拿出来单独看，看有没有缺成分，缺的是什么成分，再把谓语动词后面that前面的那部分，带到你认为缺成分的地方，如果放进去是一句完整的句子了，那就说明是强调句。
6. 用于It is important / natural / necessary / impossible that...句型中, 主语从句应使用虚拟语气, 谓语动词用\“should + 动词原形\”的形式, should有时有感情色彩。
It be suggested/ advised/ ordered/requested that sb (should) do sth…
主语从句练习题
一．翻译
1．(谁将去接他)_______________________________________________ is not decided. 2．(哪个班极会赢得这场足球赛)__________________________________ is not clear .
3．(他能否买到飞机票)______________________________________ doesn’t matter much. 4．(我们如何去那里)__________________________________________ is a question. 5．(你刚才告诉我的)_______________________________________ was really a surprise. 6．(他什么时候出国)_______________________________________ is being discussed 7．(他为什么哭)___________________________________________ is not clear.
8．It is clear______________________________________________(他是一个乞丐). 9．(你要请谁)______________________________________________ is not important. 10．(我们将在哪里举行篮球赛)____________________________________ is not clear.
二．找出下列句子中的主语从句及其引导词，并指出引导词是否充当成分，充当什么成分。
1. That we shall be late is certain.
2. That the driver could not control his car was obvious.
3. It is certain that we shall be late.
4. It was obvious that the driver could not control his car.
5. Is it possible that they will come tomorrow？
6. It is clear that he was telling the truth.
7. It’s probable that we’ll be a little late.
8. What caused the accident is a complete mystery.
9. It worried her a bit that her hair was turning grey.
10. It shocked me that Peter didn’t tell anybody where he was.
11. Who was responsible for the accident is not yet clear.
12. It’s a pity that you can’t go with us.
13. What he did is not yet known.
14. It is said that he has been there many times.
15. It is not yet clear who was responsible for the accident.
16. When they will have the sports meet is still a question.
17. It seems that he has lost something.
18. What he said at the meeting encouraged everyone.
19. What caused the accident was a broken bottle.
20. It remains a problem whether it is true.
21. Whoever breaks the law is sure to be punished.
22. What she looks like doesn’t matter.
23. How this happened is not clear to anyone.
24. Whoever comes is welcome.
25. Whether he’ll come here isn’t clear.
三．用适当的引导词填空。
1. It is likely _____ he is the winner of this game.
很可能他是这场游戏的胜利者。
2. ______ she bought so many dictionaries is not clear.
= It is not clear _____ she bought so many dictionaries.
不清楚她为什么买这么多字典。
3. ________ he was admitted into Beijing University made his teachers and parents happy. 他考上了北大，这让他的老师和父母很高兴。
4. It’s a pity________ you can’t attend my birthday party.
很可惜你不能参加我的生日聚会。
5. _________ we will build a new high school hasn’t been decided.
我们是否要建新高中还没决定呢。
6. __________ breaks the law should be punished.
不管谁违法都应该受到惩罚。
7. It is necessary ______ the problem (should) be solved at once.
很有必要立刻解决这个问题。
8. ________ he was born is unknown.
他生于何时还不知道。
9 It is possible _______ he has stolen the car.
很可能他偷了小车。
10. _______ has broken the glass is unknown.
谁打破了玻璃现在还不知道。
11. _______ he wants is all here.
他所要的东西都在这里。
12. _______ he worked it out is still a secret.
他是如何把它做出来的还是一个秘密
13. _______ they makes in this factory are TV sets.
他们在工厂里所做的东西就是电视机。
14. ________ they would support us was a problem.
他们是否会支持我们还是一个问题。
15. ________ you want is yours.
你要哪个哪个就是你的。
16. ________ we need is money.
我们需要的是钱。
17.________ we arrive doesn’t matter.
什么时候到没有关系。
18. ________ it was done was a mystery.
这是怎样做的是一个谜。
19 ________ this happended is not clear to anyone.
这件事怎样发生的，谁也不清楚。
20. ________ I spend my summer is no business of yours.
我在哪里过暑假不关你的事。
三．选择题。
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 life 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
改错：
1.Where shall we spend the holiday isn’t decided.
2.Your have made a mistake is a fact.
3.That is certain that we can win.
4.No matter who leaves the room last ought to turn off the lights.
5.It is important that a student learns a foreign language.
答案：一、翻译
1.Who will pick him up
2. Which class will win the football match
3. Whether he can buy the plane ticket
4.How we will go there
5. What you told me just now
6. When he will go abroad
7. Why he cries
8. that he is a beggar
9. Who you will invite
10.Where we will hold the basketball match
二、略
三、1.that 2. Why ;why 3. That 4. that 5. Whether 6. Whoever 7. that 8. When 9. that 10. Who
11. What 12. How 13. What 14. Whether 15. Whichever 16. What 17. When 18. How 19. How 20. Where
改错
1 we shall
2that you have
3It is
4whoever
5should learn
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---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
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
It + be + adj.+ that... 主语从句中常见的一种形式，即以引导词that引出的主语从句，常以形式主语it 代替。主语从句的时态不受主句的时态影响和限制，根据句子意思用适当的时态。结构：It is+adj.+that从句。常用于这个句型的形容词有：necessary, important, clear, strange, true, good, wonderful, possible, unusual, certain, surprising; interesting等。 根据汉语意思完成句子。 1．他可能已经把一切都告诉她了。 ____ is possible that he ____ ____ her everything. 2．海怪突然出现了很奇怪。 It ____ _____ that sea monsters suddenly ___________. 3．毫无疑问她将会在测验中做得很好。 It is certain _____ she ____ ____ well in her exam. 用适当的形容词填空 1. Miss Li often says that it is ________ to learn a foreign language well. 2. Look at the black clouds in the sky. It is ________ to rain soon. 3. It is ________ that Sunday is the first day of the week. 4. Isn’t it ________ that chickens can swim? 5. Is it ________ the lazy boy can catch up with all his classmates? 很多形容词可以与介词连用。我们已学过很多这样的搭配，现在一起来复习一下。形容词与某个特定的介词连用，表示某个特定的意思。 ①与about连接的形容词：be worried about“担心……”；be excited about“对……感到兴奋”；be careful about“小心、谨慎”；be mad about“狂热地迷恋”；be anxious about “为……感到焦虑”；feel nervous about/ at“对……感到心神不安”。 ②与at连接的形容词：be shocked at“对……感到震惊”；be good at“擅长……”；be bad at“在某方面不好或坏”；be angry at/ about sth“对……生气”；be mad at sb“对……发怒”；be surprised at“对……感到惊讶”。 ③与as连接的形容词：be famous/ known as“作为……而著名”；be known as “被叫作……”。 ④与for 连接的形容词：be good for“对……有好处”；be bad for“对……有害”；be afraid for“为……而担心”；be famous / known for sth“因……而著名”；be mad for “渴望”；be happy for“为……感到高兴”；be responsible for“负责，有责任”；be free for“对……免费”；be available for“有空的”；be thankful for“感谢，感激……”；be ready for“为……做准备”。 ⑤与from 连接的形容词：be different from“与……不同”。 ⑥与of 连接的形容词：be short of“缺乏……”；be afraid of“害怕……”；be unaware of “没意识到……，不知道……”；be tired of“厌倦，厌烦……”；be proud of“为……感到自豪”；be full of“充满……的”。 ⑦与on 连接的形容词：be based on“基于，根据”；be keen on“喜爱”；be dependent on “依靠”。
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.
主语从句 导入：观察并指出句子成分 A treehas fallenacrossthe road. Youarea student. To find your waycan bea problem. Smokingisbadfor you. 一．概念： 主语：主语是指句子谈论的主题，说明的人或事物。也就是句中动作、行为、性质和状态的主体，一般位于句首 主语从句：在句中充当主语的从句 二·基本结构 关系词简单句谓语动词宾语同位语 Thathe finished writing the composition in such a short timesurprisedusall. 他在很短的时间内写完作文让我们都很惊讶 三关系词(引导词) 1．从属连词：that whether that 引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。 That she left him cut him to the heart. That he will come is certain. 注意：有时为了使句子结构平衡, 避免“头重脚轻”, 常用it 作形式主语, 而把从句放在后面。E.g That she has made such a mistake is a pity. It is a pity that she has made such a mistake. 这样就构成了下面一些常用句型: 1) It is + adj. +从句 It is necessary that… 有必要… It is important tha t …. 重要的是… It is obvious that…… 很明显…… 2) It +不及物动词+从句 It seems/appears that... 似乎…… It happened that... 碰巧…… It occurred to me that…… 我突然想起…… 3) It + be +过去分词+从句 It is said that... 据说……
主语从句可以按其引导词的不同分为三类： 第一类,用从属连词that引导的主语从句,例如：That we shall be late is certain. That the driver could not control his car was obvious. 这种结构主要是对that从句的内容进行强调,属正式文体,连词that不可以省略；但是在一般情况下,往往使用先行it结构,即用it作形式主语,而把that从句放到后面,这时,在口语中,连词that 有时则可以省略.所以上述两句可以改为： It is certain that we shall be late. It was obvious that the driver could not control his car. 如果整个句子是疑问形式,就只能用先行it结构,例如： Is it true that he would take the risk?
Is it possible that they will come tomorrow? 常使用先行it结构,用that从句作主语的句子有下列几个句型： 1、It + be + 形容词+ that从句： It is clear that he was telling the truth. It’s probable that we’ll be a little late. 2、It + be + 名词词组+ that从句： It’s a pity that you can’t go with us. 3、It + 及物动词+ 宾语+ that从句： It worried her a bit that her hair was turning grey. It shocked me that Peter didn’t tell anybody where he was. 4、It + be + 过去分词+ that从句： It is said that he has been there many times. 5、It + seem/happen/appear等不及物动词+
主语从句 （一）主语从句的标记主语从句通常由连词that和whether (if)、连接代词或连接副词以及关系代词型what引导。 1. that引导 That he is still alive is a wonder. 他还活着，真是奇迹。 That we shall be late is certain. 我们要晚了，这是确定无疑的。 That he should have ignored the working class was natural. 他忽视工人阶级是很自然的。That she is still alive is a consolation. 她还活着是使人感到宽慰的。 That she became an artist may have been due to her father’s influence. 她成为画家可能是受她父亲的影响。 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。 That she was chosen made a tremendous stir in her village. 她被挑选上，在她村子里引起很大轰动。 2. whether引导 Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。 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 Whoever (=anyone who) fails to see this will make a big blunder. Whatever(=anything that) she did was reasonable. 无论什么 Anything that she did was reasonable. Whichever (of you) comes in first will receive a prize. 无论(你们)谁先到都可以得奖。Whichever(=anything that) you want is yours. 你要哪个哪个就是你的。 What do you need? What you need is a good rest. I don’t know what you need? 4. 连接副词引导 When we arrive doesn’t matter. 什么时候到没有关系。 When do we arrive? How it was done was a mystery. 这是怎样做的是一个谜。 How was it done? How this happened is not clear to anyone. 这件事怎样发生的，谁也不清楚。 How did this happen? How many people we are to invite is still a question. 邀请多少人还是一个问题。How many people are we to invite? Where I spend my summer is no business of yours. 我在哪里过暑假不关你的事。 Where do i spend my summer? 5. 连接代词型what引导 What(=the thing that) we need is money. 我们需要的是钱。What do we need? What I want to know is this. 我想知道的就是这一点。What’s done is done. 事已成定局。 What=the thing that he says is not important. 他说的话并不重要。What does he say? What I am telling you is mere impressions. 我和你说的都不过是一些印象而已。What make the river more beautiful are the lotus plants growing in the water. 为河水增色的是水里的荷花。What you need is a good-sized canvas bag. 你需要的是一个比较大的帆布袋。 What I am afraid of is their taking him to Portugal. 我担心的是他们把他带到葡萄牙去。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。（二）
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。
名词性从句 主语从句、表语从句、宾语从句和同位语从句，它们在复合句中的功用相当于名词，因此称为名词性从句，在句中分别作主语、表语、宾语和同位语。 1．When he will come is still unknown. 2．I don’t know who has watered the fields. 3．The problem is that we need more money. 4．Have you heard the news that our team won the game? 1．主语从句：在复合句中作句子主语的从句。 引导词：连词that、whether;疑问代词who, what, which; 疑问副词when, where, how, why (1)连词that（无词意）, whether(是否), 在从句中不担任句子成分，只起连接作用; whether能引导主语从句，而if不能。 That you don’t like him has nothing to do with me. Whether John will do this experiment remains a question. （2）疑问代词who, what, which, 在从句中既作连接词又充当主语、宾语、表语、定语等。 Who will be sent abroad to further his studies is not announced. What surprised me most was that such a little girl could play the violin so well. Which school will win the prize is not known. Whose dictionary has not been found is still unknown. Whichever you take will be yours. Whoever wants this book may take it. Whatever was said here must be kept secret. (3)疑问副词when, where, how, why在从句中充当时间状语、地点状语、方式状语、原因 状语 When they will start hasn’t been de cided yet. Where the heroine went is not mentioned at the end of the story. How he managed to finish the composition in such a short time is still a mystery. Why he often comes here is known to us all.
形式主语从句是雅思写作中非常常用的一种句型。我们先来看一下它是如何构成的。(That + 一个完整的句子可做主语)。比如说：(That education is important) is clear.这就是主语从句的基本形式。但如果句子要是这样，主语过长。所以，我们习惯于用it来代替原来的主语。而把原来的主语放在句子的最后。这句话可改为：It is clear that education is important.这就叫做形式主语从句。 以下的形式主语从句句型在雅思写作中都常常用到。希望大家能认真掌握，灵活使用。 1 It is often the case that 2 It’s a fact that 3 It seems that 4 It’s said that 5 It’s reported that 6 It’s believed that 7 It’s universally accepted that 8 It’s announced that 9 It’s estimated that 10 It must be admitted that 11 It’s obvious that 12 It must be stressed out that 13 It is widely-accepted that 14 It cannot be denied that 15 It can be foreseen that 16 It’s as clear as crystal that
17 It goes without saying that 18 It is acknowledged that 19 It is well-known that 20 It is estimated that 1．句子成分残缺不全 We always working till late at night before taking exams.（误） We are always working /We always work till late at night before taking exams（正）We should read books may be useful to us. （误） We should read books which may be useful to us. （正） 2．句子成分多余 This test is end, but there is another test is waiting for you. （误） One test ends, but another is waiting for you. （正） The driver of the red car was died on the spot. （误） The driver of the red car died on the spot. （正） 3．主谓不一致 Someone/Somebody think that reading should be selective. （误） Some think that reading should be selective. （正） My sister go to the cinema at least once a week. （误） My sister goes to the cinema at least once a week. （正） 4．动词时态、语态的误用 I was walking along the road, and there are not so many cars on the street. （误） I was walking along the road and there were not so many vehicles on the street. （正）We have little time to read some books which we interest. （误） We have little time to read some books in which we are interested. （正）
考研英语长难句：名词性从句-主语从句 名词性从句 在句子中起名词作用的句子叫名词性从句（Nominal Clauses）。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、介词宾语等，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、表语从句和同谓语从句。 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. Who will win the match is still unknown. 谁能赢得这场比赛还不得而知. 1. 由that 引导的主语从句可以直接放句首 That the seas are being overfished has been known for
years.（2006 text3） 海洋正在被人们过度捕捞，许多年以来这已是尽人皆知的事情了。 That such a conjunction of circumstances might occur again soon, especially considering shrinking US defense budgets and diminishing overseas base access,is problematical at best. 至于在近期内能否再次出现这种各个情况巧合的局面，即使最乐观的看法也是值得怀疑的，尤其是考虑到美国国防预算缩减和海外基地减少的情况。 2. 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：【第1句】 （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 It’s a pity that he didn’t come. 很遗憾他没来。 It was intended that you be the candidate. 大家的意图是让你当候选人。
FPCFromClipboardUntitled.txt 形式主语从句是雅思写作中非常常用的一种句型。我们先来看一下它是如何构成的。(That + 一个完整的句子可做主语)。比如说：(That education is important) is clear.这就是主语从句的基本形式。但如果句子要是这样，主语过长。所以，我们习惯于用it来代替原来的主语。而把原来的主语放在句子的最后。这句话可改为：It is clear that education is important.这就叫做形式主语从句。 以下的形式主语从句句型在雅思写作中都常常用到。希望大家能认真掌握，灵活使用。 1. It is often the case that... 2. It’s a fact that... 3. It seems that... 4. It’s said that... 5. It’s reported that... 6. It’s believed that... 7. It’s universally accepted that... 8. It’s announced that... 9. It’s estimated that... 10. It must be admitted that... 11. It’s obvious that... 12. It must be stressed out that... 13. It is widely-accepted that... 14. It cannot be denied that... 15. It can be foreseen that... 16. It’s as clear as crystal that... 17. It goes without saying that... 18. It is acknowledged that... 19. It is well-known that... 20. It is estimated that... 第 1 页
名词性从句之主语从句 一、名词性从句概述：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、主语从句定义： 在句中起主语作用的从句称为主语从句。 引导主语从句的连接词主要有：单纯连词（that, whether/ if）、连接代词(what, whatever, who, whoever, whom, whose, which, whichever等)和连接副词(when, where, why, how, whenever, wherever, however等)。 1)that引导的主语从句 （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.你能得奖看起来不大可能。 That light travels in straight lines is known to all. 众所周知，光沿直线传播。 That you don’t like him is none of my business.你不喜欢他不管我的事。（2）形式主语it替代主语从句位于句首，that引导真正的主语从句会放到句子的后面。常用的句式主要有如下几种： 1.It+ 系动词+形容词+that从句。 如： 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 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 can not go on like this. It is necessary that you （should）master the computer.