(完整版)主语从句详解

1、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

2、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 doesnt matter 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 弓| 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： Wh

3、at 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 弓|导的让步状语 从句的区别.Whoever breaks the law should be punishe

4、d.（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 hasnt been made pub

5、ic.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.表从练习The question is we will have our sports meet next week.A. thatB. ifC. whenD. whetherThe reason why he failed is he was to

6、o careless.A. because B. thatC. forD. because ofGo and get your coat. It5 s you left itA. where B. thereC. there where D. where thereThe problem is to take the place of TedA. who can we getB. what we can getC. who we can getD. that we can getWhat I want to know is he likes the gift given by us.A. th

7、at B. ifC. whether D.不填The reason is I missed the bus.A. thatB. whenC. whyD. whatThat is we were late last time.A. thatB. whenC. whyD. whatShe looked she were ten years younger.A. that B. like C. as D. as thoughI fell sick!-I think it is you are doing too much.A. whyB. whenC. whatD. becauseThe reaso

8、n why he hasnt come is.A. because his mother is illB. because of his mothers being illC. that his mother is illD. for his mother is ill一He was born here.That is he likes the place so much.A. thatB. whatC. whyD. howThat is Lu Xun once lived.A. whatB. whereC. thatD. Whyyour father wants to know is get

9、ting on with your studies.A. What; how are youB. That； how you areC. How； that you areD. What； how you areThe trouble is we are short of tools.A. whatB. thatC. howD. why thatAmerica was was first called India” by Columbus.A. what B. whereC. the place D. there whereChina is becoming stronger and stro

10、nger. It is no longer.A. what it used to beB. what it was used to beingC. what it used to beingD. what it was used to behe really means is he disagrees with us.A. What. thatB. That. whatC. What . whatD. That . whatThe energy is makes the cells able to do their work.A. that B. which C. what D. Suchdr

11、ove to Zhuhai for the air show last week .一Is that you had a few days off?A. whyB .what C. whenD. wherehad neither a raincoat nor an umbrella I got wet through.A. Its the reason B. Thats why C. Theres why D. Its howSee the flags on top of the building? That was we did this morning.A. whenB. whichC.

12、whereD. what Are you still thinking about yesterdays game?-Oh, thats.A. what makes me feel excited B. whatever I feel excited aboutC. how I feel about itD. when I feel excitedWhat surprised me was not what he said but he said it.A. the way B. in the way that C. in the wayD. the way whichThe question

13、 is we will have our sports meet next week.A. thatB. ifC. whenD. whetherThe reason why he failed is he was too careless.A. because B. thatC. forD. because ofGo and get your coat. If s you left itA. where B. thereC. there where D. where thereThe problem is to take the place of TedA. who can we getB.

14、what we can getC. who we can getD. that we can getWhat I want to know is he likes the gift given by us.A. that B. ifC. whetherD.不填The reason is I missed the bus.A. thatB. whenC. whyD. whatThat is we were late last time.A. thatB. whenC. whyD. whatShe looked she were ten years younger.A. that B. like

15、C. as D. as thoughI fell sick!I think it is you are doing too much.A. whyB. whenC. whatD. becauseThe reason why he hasnt come is .A. because his mother is illB. because of his mothers being illC. that his mother is illD. for his mother is illHe was born here.That is he likes the place so much.A. tha

16、tB. whatC. whyD. howThat is Lu Xun once lived.A. whatB. whereC. thatD. whyyour father wants to know is getting on with your studies.A. What; how are youB. That； how you areC. How； that you areD. What； how you areThe trouble is we are short of tools.A. whatB. thatC. howD. why thatAmerica was was firs

17、t called India“ by Columbus.A. what B. whereC. the place D. there whereChina is becoming stronger and stronger. It is no longer.A. what it used to beB. what it was used to beingC. what it used to beingD. what it was used to be.he really means is he disagrees with us.A. What. thatB. That whatC. What

18、. whatD. That . what. The energy is makes the cells able to do their work.A. that B. which C. what D. such一I drove to Zhuhai for the air show last week.Is that you had a few days off?A. whyB .what C. whenD. where.1 had neither a raincoat nor an umbrella I got wet through.A. Its the reason B. Thats w

19、hy C. Theres why D. Its how. See the flags on top of the building? That was we did this morning.A. whenB. whichC. whereD. what.- Are you still thinking about yesterdays game?Oh, thats.A. what makes me feel excited B. whatever I feel excited aboutC. how I feel about itD. when I feel excited. What sur

20、prised 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. It has been proved eating vegetables in childhood helps to protect you againstserious illnesses in later life.A. if B. because C. when D. that. The last time we had great fun was we were v

21、isiting the Water Park.A. where B. how C. when D. why.matters most in learning English is enough practice.A. What B. Why C. Where D. Which. The traditional view is we sleep because our brain is “programmed” to make use do so.A. when B. why C. whether D. that.parents say and do has a life-long effect

22、 on their children.A. That B. Which C. What D. As.is our belief that improvements in health care will lead to a stronger, more prosperous economy.A. As B. That C. This D. Itteam wins on Saturday will go through to the national championships.A. No matter what B. No matter which C. Whatever D. Whichev

23、erYou are saying that everyone should be equal, and this is I disagree.A. why B. where C. what .D howAfter Yang Liwei succeeded in circling the earth,our astronauts desire to do is walk in space.A. where B. what C. that D. howthink Father would like to know Ive been up to so far, so I decide to send

24、 him aquick note.A. which B. why C. what D. howOur country is developing at an amazing speed, and this is makes me feel so proud.A. what B. which C. that D. why12.puzzles the scientists how these creatures can survive in such severe conditions.A. What B. As C. That D. Iteaves the room last ought to

25、turn off the lights.A. Anyone B. Who C. Whoever D. The personInside the White House, there is a room called the Oval Office. Thats the presidentworks.A. whey B. when C. what D. whereyou will be admitted to York University will be decided by the Admission Committee. A. That B. Whether C. What D. IfTh

26、e reason I plan to go is she will be disappointed if I dont.A. why; that B. that; because C. which; because D. why; forWe sell handmade gifts.gift you order from us is unique for the special person!A. Which B. That C. Whichever D. WhatWhen the plane is to take off has not been announced .=It has not

27、 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 比拟：It was reported that the US was under the terrorist attack.As was reported, the US was under the terrorist attack.(

28、2)常见用it作形式主语的复合句结构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 mysteiy to me how it all happened.It is common knowledge that the whale is not a fish.It is no s

29、urprise that Bob should have won the game.Its a pity that you missed the film.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.重要的是类彳以的形容词还有：Strange; natural; obvious; true; good; wonderful; possible; unlikely; quite;unusual; certain; evident; wort

30、h-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) maste

31、r 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) +动词原形二即要用虚拟语气.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 proved that.必须指出类彳以的过去分词还有：known; estimated; e

32、xpected; 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 h

33、as not been made clear when the new road is to be opened to traffic.It is said that he was killed in the earthquake.It seems (happened / appears / doesnt 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

34、not.It does not matter if I missed my train.It happened that I saw him yesterday.主从练习.as much as one-fifth of all timber harvested is not used.A. The estimateB. The estimatedC. They are estimated D. It is estimated that2.some mammals came to live in the sea is not known.A. Which B. Since C. Although

35、 D. How.we have achieved is attributed to the guidance of our parents.A. Whoever B. Whatever C. However D. That.wealthy does not necessarily mean that a man is greedy.A. For the reason that he is B. Just because he isC. The reason of beingD. That he isAlthough happened in this developed country soun

36、ds like science fiction, it could occurelsewhere in the world.A. which B. what C. how D. it6.she had forgotten to take her notebook.A. That occurred to herB. She occurred thatC. To her that occurredD. It occurred to her thatam sure that she said is wrong.A. which B. all C. this D. whatWe lost our wa

37、y in the forest, and made matters worse was that it was getting dark.A. that B. which C. it D. What9.or not is still uncertain.A. Hes comingB. If he is comingC. That comingD. Whether hes coming10. Its hell be able to come.A. doubt whether B. doubtful C. doubt it D. doubtful whether.he is at work in

38、the heart of the big city or at home in the quiet suburb, Dicks 1 ife is tied to machines.A. Whether B. Till C. If D. Unless.he saw both surprised and frightened him.A. That B. When C. What D. Which13.is warm sunshine.A. What do we all need. B. What all we needC. What we needD. What we all need14.is

39、 a pity that he should feel so upset.A. What B. That C. He D. It15.a spoonful of soil can tell us so much about the structure and early history of the moon.A. RemarkableB. Quite remarkablyC. It is remarkable that D. It is remarkable fact that.you nominate will be elected.A. Who B. Whom C. Whomever D

40、. Thafs.book you borrow must be returned within a week.A. WhatB. WhichC. Whichever D. Thafs18.of us gets home first starts cooking.A. WhoB. WhichC. Whichever D. Anyone.makes mistakes must correct them.A. What B. That C. Whoever D. Whatever. It worried her a bit her hair was turning grey.A. while B.

41、that C. if D. for.When and why he came here yet.A. is not known B. are not knownC. has not known D. have not known4.is no reason for dismissing her.Because she was a few minutes lateOwing to a few minutes lateThe fact that she was a few minutes lateBeing a few minutes late.Tom liked to eat was diffe

42、rent from.A. That.that you had expected B. What .that you had expectedC. That.what you had expected D. What.what you had expected.we go swimming every day us a lot of good.A. If.do B. That.do C. If.does D. That.doest Bob drives badly.A. thinks that B. is thought what C. thought that D. is thought th

43、atts uncertain the experiment 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.we cant get seems better than we have.A. What, what B. What, that C. That, that D. That, what.you donft like him is none of my business.A. W

44、hat B. Who C. That D. Whetherell go camping tomorrow depends on the weather.A. IfB. Whether C. That D. Where13.is going to do the job will be decided by the Party committee.A. That B. Why C. How D. Who.well finish translating the book depends on the time.A. When B. Why C. What D. That.he wont go the

45、re is clear to all of us.A. How B. What C. Why D. This.the house will be built will be discussed at tomorrows meeting.A. IfB. Where C. That D. What.you come or not is up to you.A. What B.IfC. Why D. Whether.makes mistakes must correct them.A. Who B. Anyone C. Whoever D. Anybody.team will win the mat

46、ch is a matter of public concern.A. Which B. That C. IfD. How. Who is this factory some foreign friends visited last Friday?A. that B. where C. which D. the one.Is this factoryyou visited the other day?A. that B. where C. in which D. the one.leaves the room last ought to turn off the lights.A. Anyon

47、e 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附属连 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

48、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 couldnt 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、由附属连词that, whether引导的表语从句.that在引导表语从句时无词义

49、，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 t

50、hat it was too valuable for everyday use.问题是它作为日常之用太贵重了. What she couldnt understand was that fewer and fewer students showed interest in her lessons. 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 等弓I 导表 语从句，在句中作主语、宾语、表语，关系代词不能省略.The

51、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.Thats what he is worrying about.那就是他在担忧的事.Thats 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. Its 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. Thafs why I

52、got wet through.我彳门既没伞也没雨衣,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.那就是他所担忧的.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.Thats because we never thought of it.这是因为我们从未想过止匕事.It seems as

53、if he didnt 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)feel, seem , look, appear 9sound9 taste, smellstand , lie , remain ,keep, staybecome ,get, grow , turn ,go ,come, run,fallprove, 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：

54、that / whether /as if /asthough (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 didnt go there.事实是我没去那儿.考题 1 The traditional view is we sleep because our brain is programmed” tomake us do so.A. when B. why C. whether D

55、. 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 isI 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.一 Is