高考英语主语从句讲解

1、学习必备欢迎下载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。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)连接副词 : when, where, how和 why 。连接词 ：主语从句的 时态：不受主句的时态影响和限制和 which (whichever)；。1. 从属连词： that ， whether1）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 ”，

2、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

3、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。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不仅What we need is money.That he wil

4、l 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 :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 depe

5、nds 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, sur

6、prising, 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 sapity

7、that wecantgo.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, doesntmatter ,turn out） 。如：It happened that I was out that day.It doesntmatter whether she will come or not.2) 对于以连

8、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。）学习必备欢迎下载句：a. Whether they would support us was a problem.b. It was a problem whether they would support us.3 ）主语从句中的否定前移当用 it 作形式主语 ,而将主语从句放在句尾时,主语从句中的否定词常要前移至主句中。例如:It doesn t seem that they are from the same university.It doesn t appear that we ll have a

9、 sunny day tomorrow.5. 注意：1）主语从句在句首时，必须由连接词引导，不能省略这些连接词。误： They should like each other is natural.正：That they should like each other is natural.2）在It + be + suggested/advised/ordered/requested/ insisted/required中, that 从句的谓语也应该用“ should + 动词原形 ”的形式 , should 有时可以省略。主语从句中用陈述语序,后面的谓语动词用第三人称单数 . It is s

10、uggested that we (should) do the experiment a second time.3) . 用于It is important / natural / necessary / impossible that.句型中 , 主语从句应使用虚拟语气, 用“ should + 动词原形 ”的形式 , should有时可以省略。It is important and necessary that we (should) keep the balance of nature.4） “ what引”导主语从句时，谓语动词：常与其后的名词作表语一致，且根据句子的语境而定。eg

11、 ：What you left are only several old books.What you said is of great importance.5）在 It is funny, strange, surprising, a pity, a shame, no wonder, etc. + that从句中，有时谓语部分用should +动词原形，来表达说话者的感情色彩，此时should 也可省略。6）语气"It be + adj./n. + that-clause"与强调句型均有It be.that. 之类的语言标志,但不同的是 :前者中的that 从句是主语

12、从句.若删掉其中的It be 和 that, 则剩余部分不论结构还是语意都不能成为一个句子;但若将后者中的 It be 和 that 去掉 ,则剩余部分的结构和语意仍能构成一个完整的句子.强调句型译为汉语时可加上"正是 "或 "就是 "之类的字眼 ,而主语从句则不可以.It is surprising that Mary should have won first place.令人惊奇的是玛莉竟然获得了第一名.It is Mary that has won first place.正是玛莉得了第一名.【强调】6. 主语从句的规律：例 1.When wil

13、l he come is not known.正： When he will come is not known.规律一、主语从句一律用陈述语序，即主语在前，谓语在后。例 2. He will not come to the meeting this evening is true.正： That he will not come to the meeting this evening is true.规律二、连词that在从句中无实际意义，但不能省略。例 3. If the meeting will be put off has not been decided yet.正： Whether

14、 the meeting will be put off has not been decided yet.规律三、 whether可以引导主语从句，放在句首，但if 不能例 4. That whether he will help others is a fact.正： That he will help others is a fact.规律四、主语从句中的连词不能重叠使用。例 5. When he will come are a puzzle.正： When he will come is a puzzle.规律五、含主语从句的主句谓语动词多用单数第三人称形式。1. What he ne

15、eds is that book.2. What he needs are some books.规律六、 what引导的主语从句，可根据表语决定主句动词的单复数形式。规律七、主语从句为了避免头重脚轻现象，用it做形式主语，而把从句放在后面。That the earth turns around the sun is known to all.It is known to all that the earth turns around the sun.1.what / that学习必备欢迎下载a._ he said at the meeting surprised us.b._ he turn

16、ed up at the meeting surprised us.2. if / whether_you go or stay at home won t make any differences.3.itWhat a pity _is _you didn t arrive by daylight.A. there, becauseB. it, thatC. he, whenD. that, for4.no matter how/who/what/where/whenWe are ready to do _ the country wants us to do.A. whatB. which

17、C. no matter whatD. whatever5.It is a pity that you (should) miss such a good chance._ he made an important speech at the meeting was true.A. ThatB. WhyC. WhatD.How6. _we ll go camping tomorrow depends on the weather .A IfB WhetherC ThatD Where7._ is known to us all is that America is a developed co

18、untry .AWhichBAsCWhatDIt8. It s known to us all _ a form of energy .A. water isB. that water isC. is waterD. that water to9. It worried her a bit _ her hair was turning gray.A. whetherB.thatC. whatD. when10.What I say and think _ none of your business.A. isB.areC. hasD have11. _ his dream of going t

19、o college will come true is uncertain.ThatB. WhetherC. IfD. Even if12. It is known to us _ where there is pollution, there is harm.A. whichB. whereC. whatD. that13. - I saw your neighbor break your window with a basketball.- _ it made me nearly mad.A. That he brokeB. What he brokeC. He brokeD. His b

20、reak14.It remains a question _ we can get so much money in such a short time.A.howB. thatC. whenD. what15.He made a promise _ anyone set him free he would make him very rich.A. thatB. ifC. whatD. that if16.They lost their way in the forest and _ made matters worse was _ night began to fall.A. what;

21、thatB. it; thatC. what; whenD. which; what17. _that they found an unusual plant in the forest.A. It is said B. They are said C. It said D. It says18. _ caused the accident is still a complete mystery.A. What B. That C. How D. Where19. It worried Mary a lot _ she would pass the college entrance exami

22、nation.A. whether B. if C. that D. how20. _ is no possibility _ Bob will win the first prize in the match.A. There, that B. It, that C. There, whether D. It, whether21. _surprised me most was _such a little girl of seven could play the violin so well.A. That; what B. What; that C. That; that D. What

23、; what22. _ helped to save the drowning girl is worth praising.A. Who B. Anyone C. Whoever D. The person学习必备欢迎下载23 . _ she couldn t understand was _ fewer and fewer students showed interest in her lessons.A. What; why B. That; why C. What; because D. Why; that24. It was _ he said _ disappointed me.A

24、. What; that B. That; that C. What; what D. That;what25. _ is a fact that English is being accepted as an international language.A. There B. This C. That D. It26. _leaves the room last ought to turn off the lights. A. Anyone B. The person C. Whoever D. Who27._ makes mistakes must correctthem.A. What

25、 B. That C. Whoever D. Whatever28. Is this factoryyou visited the other day?A. that B. where C. in which D. the one29.When and why he came here _ yet.A. is not known B. are not knownC. has not known D. have not known30. _ is no reason for dismissing her.A. Because she was a few minutes lateB. Owing

26、to a few minutes lateC. The fact that she was a few minutes lateD. Being a few minutes late31. _ Tom liked to eat was different from _.A. That that you had expected B. What that you had expectedC. That what you had expected D. What what you had expected32._ we go swimming every day _ us a lot of good.A. If.do B. That.do C. If.does D. That.does33.It _ Bob drives badly.A. thinks thatB. is thought whatC. thought thatD. is thought that34.It's uncertain _ the experiment is worth doing.35._ the boy didn't take medicine made his mother an