主语从句讲解练习及答案.docx

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 例如：It is used to be thought that a new star mustbe due to a collision between two stars.It has not been made clear when the new road is to be opened to traffic. It seems 不及物动词(happened / appears / doesn ' t matter / makes no difference / occurred .)that .主语从句不可提前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 support us was a problem. 他们是否会支持我们还是一个问题。

It was a problem whether they would support us.他们是否会支持我们还是一个问题⑶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4)如果句子是疑问句，则必须用带形式主语it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？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 .A. is not known B. are not known C. has not known D. have not known5. Tom liked to eat was different from .A. That...that you had expec ted B. Wha t ...that you had expec tedC. That ...wha t you had expec ted D. Wha t...wha t you had expec ted6. 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 doing.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. That 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 must correct them.A. Who B. Anyone C. Whoever D. Anybody19.. team will win the match is a matter of public concern.A. Which B. That C. If D. How20.. leaves the room last ought to turn off the lights.A. Anyone B. The person C. Whoever D. Who答案： 1~5 CBACD 6~10DDCAA 11~15 CBDAC 16~20 BDCAC。