一、主语从句的连词分三类
(1)从属连词引导的主语从句 (that whether if)
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。That 引导主语从句通常用it 作形式主语。
That she survived the accident is a miracle.
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 不能在开头，只能用whether 。
Wlietlier she is coming or not doesn't matter too much.
（2）用连接代词引导的主语从句
在由连扌妾代词 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.
Whatever we do is to serve the people.
注:whatever / whoever 的功用
whatever = anything that; whoever = anyone who 。要注意和 whatever, whoever 引导的让步状语从句的区别。
如: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-)
主语从句
例如
(3)用连接副词when, where, why, how引导的名词性从句(其连接副词有含义，在句中作状语。) 例女n：Where we should leave it is a problem.
Wlien they will come hasn^t been made pubic.
三、it作形式主语的主语从句
有时为了考虑句子平衡，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。这分四种情况:
⑴ 对于以连词that引导的主语从句，通常用形式主语it替代主语从句:
It is a fact that事实是；It is good news that .................. 是好j肖息.；It is a
question that ......... 是个i可题；It is common knowledge that ........... 是常识It is common knowledge that the whale is not a fish.
It is no surprise that Bob should have won the game.
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
It seems obvious that we can not go on like this.
It is necessary that you (should) master the computer.
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。
It is said that … 据说.... ；It is reported that … 据报道 ...... ；It has been proved that … 已证明..... ；It must be proved that… 必须指出....... 例如：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 makes no difference whether he will attend the meeting or not.
It does not matter 讦I missed my train.
It happened that I saw him yesterday.
(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句：
Whether they would support us was a problem.他们是否会支持我们还是—
问题。
It was a problem whether they would support us他们是否会支持我们还是—问题。(3)对关系代词型what引导的主语从句，通常直接将主语从句放在句首。如：What we need is money,我们需要的是钱。
What I want to know is this.我想知道的就是这一点。
有时也可将助用形式主语。如：It is clear enough what he meant,他是什么意思很清楚。
⑷ 如果句子是疑问句，则必须用带形式主语h的结构:
Is it true that he is the girl* s father?他是那女孩的父亲，是真的吗？
How is it that you are late again?你怎么又迟到了？
四、连词that的省略问题
引导主语从句的连词that有时可省，有时不能省，其原则是：若that引导
的主语从句直接位于句首，则that不能省略；若that引导的主语从句位于
句末，而在句首使用了形式主语it,则that可以省略:
That you didn' t go to the talk was a pity.很遗憾你没去听报告。（that 不可省）It was a pity （that） you didn^ t go to the talk,很遗憾你没去听报告。（that 可
A- thinks that B. is thought what C. thought that D- is thought that
the exp eriment is worth doing.
A. if
B. that
C. whether
D. how the boy didn't take medicine made his mother angry<
A. That B, What C. How D, Which
A. What, what
B. What, that
C. That, that D, That, what
省）
主语从句练习题
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. Wliat.. .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 7Jt
Bob drives badly.
8.It's uncertain
9. 10-
we can't get seems better than we have.
11. OU don't like him is none of my business*
A. What
B. Who
C. That D, Whether
12.. ____ we'll go camping tomorrow dep ends 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 dep ends on the time.
-
A. When
B. Why
C. What
D. That
15
he wont 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
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.. leaves the room last ought to turn off the lights.
A. Anyone
B. The person
C. Whoever D, Who
答案：高考题：CBBA 1~5CBACD 6~10DDCAA 11~15CBDAC
16-20 BDCAC
主语从句造句： 1.How well the prediction will be validated by later performance depends upon the amount and reliability of the information used. 这些预测以后将在多大程度上被之后的表现证实，取决于所采用信息的数量和可靠性。 2.It is often important that you make it clear what your particular role is at a given time. 你要搞清楚在指定时期内你的特定角色是什么，这很重要。 3.It is reported that the unemployment rate is very high in many developed countries because financial crisis. 据报道，由于金融危机，很多发达国家的失业率都很高。 4.That mental health is important to physical condition is a fact. 精神健康对身体状况很重要，这是一个事实。 5.That he finished writing the composition in such a short time surprised us all. 他在这么短的时间内完成了写作使我们所有人都惊讶。 6.Whether we will go for an outing tomorrow remains unknown. 我们明天是否会去远足有待商榷。 7.What make the river more beautiful are the plants growing in the water. 为河水增色的是水里的荷花。 8.What struck me was that they have all suffered a lot. 给我印象深刻的是他们都受过很多苦。 9.Whether we will hold a party in the open air tomorrow depends on the weather. 我们明天是否在户外开晚会要看天气而定。 10.Which car you will choose to buy makes no difference. 你决定买哪一辆车都不会有任何区别。 11.It is common knowledge that honesty is the best policy. 诚实是最好的政策是共识。 12.What they need most is not financial aid or loan but advanced technologies and talents in certain key areas.
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。
主语从句用法小结 勉县第二中学高二（7）班郭恬 指导老师：李艳 请观察下列句子, 注意主语从句的特点。 1. That the earth travels round the sun is a well-known fact. 2. Whether the artist can do it or not is uncertain. 3. Who will act the lead in the play has not been decided yet. 4. Where the young man has gone is not known. 5. When and where the test will be given is not yet decided. 【归纳总结】主语从句必须有引导词；主语从句用陈述句语气。 1. 引导主语从句的词有： 连词: that, whether； 连接代词: who, whose, whom, whoever, what, which等； 连接副词where, when, whenever, wherever, how, why等。 主语从句引导词的选择： 1).连接词: that, whether (1) That he will win is certain. (2) It has been reported that sales of beef in China will increase. (3) Whether we shall raise ducks or geese remains to be decided. (4) Whether he ’ll join us in the discussion is of great importance. 2) 连接代词: who, whom, whose, what, which, whoever, whatever, whichever 等。 (1) It is clear who is afraid of having a change in land ownership. (2) Whose bag it is cannot be told. (3) What India needs is a law to make land ownership fairer. (4) It is not yet decided which cash crop will be produced next year. (5) Whatever he said was right.
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 一、主语从句的连词分三类 （1）从属连词引导的主语从句（that whether if） 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。That 引导主语从句通常用it 作形式主语。 That she survived the accident is a miracle. 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不能在开头，只能用whether。 Whether she is coming or not doesn’t matter too much. （2）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Whatever we do is to serve the people. 注：whatever / whoever的功用 whatever = anything that; whoever = anyone who。要注意和whatever, whoever 引导的让步状语从句的区别。 如：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. ） （3）用连接副词when, where, why, how引导的名词性从句(其连接副词有含义,在句中作状语。) 例如:Where we should leave it is a problem.
主语从句( if除外) 一定义：在复合句中充当主语的句子，叫主语从句；位于句首。 二：读例句，理解句意，思考，分析，总结。 1：连接词that 引导的主语从句： EG:1）That you are so angry bothers me. 你如此生气使我很烦恼。 2）That she survived the accident is a miracle.她在事故中幸免于难简直是奇迹。 3）It was a pity (that) you didn’t go to the talk.很遗憾你没有去听报告。 4）That he has moved to New York is not true.= It is not true that he has moved to New York. 5）That the earth is round is true.= It is true that the earth is round. 总结：在连接词that 引导的主语从句中，that ___含义，在句子___做成分，__省。EX: 1)______ he will succeed is certain. 2) ________ you didn’t go to the park was a pity. 3) ______ you will win the medal seems unlikely. 2: 连接词whether引导的主语从句。 EG: 1）Whether wild life can be well protected is of great importance. 2）Whether Mary really heard him is really doubtful. 3）Whether it will do us harm remains to be seen. 是否对我们有害还要看一看。 4）Whether he will come hasn’t been decided.= It hasn’t been decided whether he will come. 总结：在连接词whether 引导的主语从句中，whether__含义，____做成分，__ 省。EX: 1) ______ she is coming or not doesn’t matter too much. 她来不来都无关紧要。 2) ______ they would support us was a problem. 他们是否会支持我们还是一个问题。 3) _______ to hold the meeting has not been discussed. 3：在连接代词（who,whom,whose,which,what,whoever,whomever,whichever,whatever）引导的主语从句中。 EG: 1）What is needed for the space trip is careful preparation. 2）Who will be sent to carry out the task has been settled. 3）Whom she borrowed money from still puzzled me. 4）Which side will win is not clear. 5）What I want to know is this. 6）Whoever breaks the law will be punished.( _____ 从句) = Anyone who breaks the law will be punished . ( _____ 从句) 比较：Whoever breaks the law , he should be punished. ( _____ 从句) = No matter who breaks the law, he should be punished. ( _____ 从句) 总结：在连接代词引导的主语从句中，连接代词__含义，___成分，做___语、___语、___语，_____ 省。
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 一、主语从句的概念与类型 主语从句在复合句中作主句的主语,引导主语从句的词有从属连词that, whether以及连接代词who, what, which, whoever, whatever, whichever和连接副词when, where, why, how等.例如: That she was chosen made us very happy.她当选了使我们很高兴. What caused the accident is a complete mystery.是什么导致了这次事故还完全是一个谜. Whether she will come or not is still a question.她是否来还是一个问题. Which team will win the match is still unknown.哪个队会赢得这场比赛还不知道. Whoever comes to the party will receive a present.参加聚会的每一个人都将收到一份礼物. When they will start has not been decided yet.他们何时出发还没决定. 注意:上述例句中的主语从句都是放在句首,但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.例如: It is a pity that she has made such a mistake.她犯了这样一个错误,真是遗憾. It depends on the climate whether they are going shopping today.他们是否今天去购物还得看天气情况. 这样就构成了下面一些常用句型: 1)It is + adj. / n. +从句 It is a pity/shame that...遗憾的是…… It is possible that...很可能…… It is unlikely that...不可能…… 2)It +不及物动词+从句 It seems/appears that...似乎…… It happened that...碰巧…… 3)It + be +过去分词+从句
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 1.That he is still alive is a wonder. 2.That we shall be late is certain. 3.That he should have ignored the working class was natural. 4.That she is still alive is a consolation. 5.That she became an artist may have been due to her father's influence. 6.That you are coming to London is the best news I have heard this long time. 7.That she was chosen made a tremendous stir in her village. 8.Whether it will do us harm remains to be seen. 9.Whether they would support us was a problem. 10.Whoever is top from wins the game when two matched players meet. 11.Whichever (of you) comes in first will receive a prize. 12.Whichever you want is yours. 13.When we arrive doesn't matter. 14.How it was done was a mystery. 15.How this happened is not clear to anyone. 16.How many people we are to invite is still a question. 17.Where I spend my summer is no business of yours. 18.What we need is money. 19.What I want to know is this. 20.What's done is done. 21.What he says is not important. 22.What I am telling you is mere impressions. 23.What make the river more beautiful are the lotus plants growing in the water. 24.What you need is a good-sized canvas bag. 25.What I am afraid of is their taking him to Portugal. 26.What struck me was that they have all suffered a lot. 27.It's a pity that he didn't come. 28.It is important that he should know about this. 29.It's vital that we be present. 30.It was intended that you be the candidate. 31.It is important that this mission not fail. 32.It is essential that a meeting be convened this week. 33.It is appropriate that this tax be abolished. 34.It's unfair that so many people should lose their jobs. 35.It's amazing that she should have said nothing about it. 36.It's unthinkable that they should deny my request. 37.That they should refuse to sign the petition required great courage. 38.Whether they would support us was a problem. 39.It was a problem whether they would support us. 40.It remains to be seen whether it will do us harm or good. 41.What we need is money. 42.What I want to know is this.
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……
主语从句 一、翻译下列句子 1.That he is still alive is a wonder. 2.That we shall be late is certain. 3.That he should have ignored the working class was natural. 4.That you are coming to London is the best news 5.Whether it will do us harm remains to be seen. 6.Whether they would support us was a problem. 7.Whether they would support us was a problem. 8.When we arrive doesn't matter. 9.When we shall hold our sports meet is not decided. 10.How it was done was a secret 11.How this happened is not clear to anyone. 12.How many people we are to invite is still a question. 13.Where I spend my summer is no business of yours. 14.What we need is money. 15.What I want to know is this. 16.What he says is not important. 17.What make the river more beautiful are the lotus plants growing in the water. 18.What struck me was that they have all suffered a lot. 19.It's a pity that he didn't come. 20.It is important that he should know about this. 21.It's unfair that so many people should lose their jobs. 22.It's amazing that she should have said nothing about it. 23.It's unthinkable that they should deny my request. 24.It seems that you are right. 25.It was clear his words pleased her. 26.It doesn’t matter much where we live. 27.It was a problem whether they would support us. 28.It remains to be seen whether it will do us harm or good. 29.It is said that he’s got married. 30.It is believed that he will win the match. 31.It is reported that Chinese team got 102 golden medals. 32.Whoever pollutes the environment should be punished. 33.Whatever he did was right.
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。