主語(yǔ)從句講解及其練習(xí)

1、精選優(yōu)質(zhì)文檔-傾情為你奉上主語(yǔ)從句一、主語(yǔ)從句的連詞分三類（1）從屬連詞引導(dǎo)的主語(yǔ)從句 （that whether if）that引導(dǎo)的主語(yǔ)從句:引導(dǎo)詞that無(wú)含義/在句中不做成分/不可以省。That 引導(dǎo)主語(yǔ)從句通常用it 作形式主語(yǔ)。例如：That you will win the medal seems unlikely. That she survived the accident is a miracle.whether 引導(dǎo)的主語(yǔ)從句: whether有含義(是否)/在句中不做成分/不可以省。注意：引導(dǎo)主語(yǔ)從句，不能用if不能在開(kāi)頭，只能用whether。Whether we w

2、ill hold a party in the open air tomorrow depends on the weather. Whether she is coming or not doesnt matter too much.（2） 用連接代詞引導(dǎo)的主語(yǔ)從句 在由連接代詞who, whose, whom, which, what, whoever, whomever, whichever, whatever引導(dǎo)的名詞性從句中，其連接代詞在句中起名詞性作用，擔(dān)當(dāng)一定成分.例如：What you need is more practice. Whatever we do is to se

3、rve the people.注：whatever / whoever的功用whatever, whoever在主語(yǔ)從句中不含疑問(wèn)意義。它引導(dǎo)主語(yǔ)從句，并在從句中作主語(yǔ)、賓語(yǔ)、表語(yǔ)等。whatever = anything that; whoever = anyone who。要注意和whatever, whoever引導(dǎo)的讓步狀語(yǔ)從句的區(qū)別。如：Whoever breaks the law should be punished. （主語(yǔ)從句）（ Anyone who breaks the law should be punished. ） Whoever breaks the law, he

4、 should be punished. （讓步狀語(yǔ)從句）（ No matter who breaks the law, he should be punished. ）（3）用連接副詞when, where, why, how引導(dǎo)的名詞性從句(其連接副詞有含義,在句中作狀語(yǔ)。)例如:Where we should leave it is a problem. When they will come hasnt been made pubic.三、it 作形式主語(yǔ)的主語(yǔ)從句有時(shí)為了考慮句子平衡，通常在主語(yǔ)從句處使用形式主語(yǔ)it，而將真正的主語(yǔ)從句移至句末。這分四種情況：(1) 對(duì)于以連詞tha

5、t引導(dǎo)的主語(yǔ)從句，通常用形式主語(yǔ)it替代主語(yǔ)從句：<a> It is +名詞+從句It is a fact that 事實(shí)是；It is good news that 是好消息；It is a question that 是個(gè)問(wèn)題；It is common knowledge that 是常識(shí)類似的名詞還有：a pity；a wonder；a good thing； no wonder； surprise等。It is a mystery to me how it all happened.It is common knowledge that the whale is not a

6、 fish.It is no surprise that Bob should have won the game. <b> It is +形容詞+從句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 重要的是類似的形容詞還有：strange; natural; obvious; true; good; wonderful; possible; unlikely; quite; unusual; certain; evident; worth-while;

7、 surprising; interesting; astonishing, etc.It is doubtful whether she will be able to come.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. 需要注意的是這類主語(yǔ)從句中，謂語(yǔ)動(dòng)詞很多為“（should）動(dòng)詞原形”，即要用虛擬語(yǔ)氣。<c>

8、; It is +過(guò)去分詞+從句It is said that 據(jù)說(shuō)；It is reported that 據(jù)報(bào)道；It has been proved that 已證明；It must be proved that 必須指出類似的過(guò)去分詞還有：known; estimated; expected; believed; thought; hoped; noted; discussed; required; decided; suggested; demanded; made clear; found out,etc.例如：It is used to be thought that a new

9、 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.<d> It seems不及物動(dòng)詞（happened / appears / doesntt matter / makes no difference / occurred ）that 主語(yǔ)從句不可提前 It makes no difference whether he will attend the meeting or not. It

10、 does not matter if I missed my train.It happened that I saw him yesterday. (2) 對(duì)于以連接代詞(副詞)引導(dǎo)的主語(yǔ)從句，可以使用形式主語(yǔ)代主語(yǔ)從句，也可直接在句首使用主語(yǔ)從句：Whether they would support us was a problem. 他們是否會(huì)支持我們還是一個(gè)問(wèn)題。It was a problem whether they would support us.他們是否會(huì)支持我們還是一個(gè)問(wèn)題。(3) 對(duì)關(guān)系代詞型what引導(dǎo)的主語(yǔ)從句，通常直接將主語(yǔ)從句放在句首。如：What we nee

11、d is money. 我們需要的是錢。What I want to know is this. 我想知道的就是這一點(diǎn)。有時(shí)也可將助用形式主語(yǔ)。如：It is clear enough what he meant. 他是什么意思很清楚。(4) 如果句子是疑問(wèn)句，則必須用帶形式主語(yǔ)it的結(jié)構(gòu)：Is it true that he is the girls father? 他是那女孩的父親，是真的嗎？How is it that you are late again? 你怎么又遲到了？四、連詞that的省略問(wèn)題引導(dǎo)主語(yǔ)從句的連詞that 有時(shí)可省，有時(shí)不能省，其原則是：若that引導(dǎo)的主語(yǔ)從句直接

12、位于句首，則that不能省略；若that引導(dǎo)的主語(yǔ)從句位于句末，而在句首使用了形式主語(yǔ)it，則that可以省略：That you didnt go to the talk was a pity. 很遺憾你沒(méi)去聽(tīng)報(bào)告。(that不可省)It was a pity (that) you didnt go to the talk. 很遺憾你沒(méi)去聽(tīng)報(bào)告。(that可省)5、 高考題：1、It never occurred to me_you could succeed in persuading him to change his mind.(陜西高考)Awhich Bwhat Cthat Dif2、

13、It's obvious to the students_they should get well prepared for their future.(天津卷)Aas Bthat Cwhich Dwhether3、_some people regard as a drawback is seen as a plug by many others.(2010·北京)AWhetherBWhat CThat DHow4、It is uncertain_side effect the medicine will bring about，although about two thou

14、sand patients have taken it.(2010·浙江)Athat Bhow Cwhat Dwhether主語(yǔ)從句練習(xí)題1._ makes mistakes must correct them.A. What B. That C. Whoever D. Whatever2. 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.

15、 has not known D. have not known4. _ is no reason for dismissing her.A. Because she was a few minutes late B. Owing to a few minutes lateC. The fact that she was a few minutes late D. Being a few minutes late5. _ Tom liked to eat was different from _.A. Thatthat you had expected B. What that you had

16、 expectedC. Thatwhat you had expected D. Whatwhat you had expected6._ we go swimming every day _ us a lot of good.A. If.do B. That.do C. If.does D. That.does7.It _ Bob drives badly.A. thinks that B. is thought what C. thought that D. is thought that8.It's uncertain _ the experiment is worth doin

17、g.A. if B. that C. whether D. how9._ the boy didn't take medicine made his mother angry.A. That B. What C. How D. Which10._ we can't get seems better than _ we have.A. What, what B. What, that C. That, that D. That, what11._ you don't like him is none of my business. A. What B. Who C. Th

18、at D. Whether12._ we'll go camping tomorrow depends on the weather.A. If B. 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. Who14._we'll finish translating the book depends on the time.A. When B. Why C. What D. That15._he won't go there is clear to all of us.A. How B. What C. Why D. This16._the house will be built will be discussed at tomorrow's meeting.A. If B. Where C. That D. What17. ._you come or not is up to you.A. What B. If C. Why D. Whether18._makes mistakes