公开课主语从句讲解练习及答案

1、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（ thatwhetherif ） that 引导的主语从句:引导词 that 无含义 /在句中不做成分/不行以省； 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/不行以省；留意：引导主语从句，不能用if 不能在开头，只能用whether ； whether she is coming or notdoesn mtatter too much.（ 2） 用连接代词引导的主语从句在由连接代词who, wh

2、ose, 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，担当肯定成分 .例如whatever we do is to serve the people.注： whatever / whoever 的功用whatever = anything that; whoever = anyone who；要留意和whatever, whoever引导的让步状语从句的区分；如： whoever breaks the law should be punished.（主语从句）（ anyone

3、 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.when they will comehasn bteen made pubic.三、 it作形式主语的主语从

4、句有时为了考虑句子平稳，通常在主语从句处使用形式主语语从句移至句末；这分四种情形：it ，而将真正的主1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：<a> 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 it is common knowledge that the whale is not a fish.it is no surprise that bob should

5、 have won the game.<b> it is + 形容词 +从句it is necessary that有必要； it is clear that很清晰； it is likelythat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.需要留意的是这类主语从句中，谓语动词许多为“（ should）动词原形” ，即要用虚拟语气；<c> it is +

6、 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 必需指出 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.<d>itseems不及物动词

7、（ happened / appears /doesn ttmatter/ makes no difference / occurred） that主语从句不行提前it makes no difference whether he will attend the meeting or not. it does not matter if 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 suppor

8、t us was a problem.他们是否会支持我们仍是一个问题；it was a problem whether they would support us.他们是否会支持我们仍是一个问题；(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.他是什么意思很清晰；(4) 假如句子是疑问句，就必需用带形式主语it 的结构：is it t

9、rue 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，其原就是：如that引导的主语从句直接位于句首，就 that 不能省略； 如 that 引导的主语从句位于句 末，而在句首使用了形式主语it ，就 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 不行省 it was a pity that you didn

10、 t go to the talk. 很遗憾你没去听报告； that 可省 主语从句练习题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. for3. when and why he came here yet.a. is not known b. are not knownc. has not known d. have not known4.

11、is no reason for dismissing her.a. because she was a few minutes lateb. owing to a few minutes latec. the fact that she was a few minutes lated. being a few minutes late5. tom liked to eat was different from .a. thatthat you had expected b. whatthat you had expectedc. thatwhat you had expectedd. wha

12、twhat you had expected 6. we go swimming every day us a lot of good.a. if.do b. that.doc. if.does d. that.does 7.it bob drives badly.a. thinks that b. is thought what c. thought that d. is thought that 8.it's uncertain the experiment is worth doing.a. if b. that c. whether d. how9. the boy didn&

13、#39;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, what 11. you don't like him is none of my business.a. what b. who c. that d. whether12. we'll go camping tomorrow depends

14、 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 must correct them.a. who b. anyone c. whoever d. any