《主语从句讲解及练习》由会员分享，可在线阅读，更多相关《主语从句讲解及练习（4页珍藏版）》请在金锄头文库上搜索。
1、主语从句（Subject Clause）讲解及练习定义:在复合句中充当主语的句子叫做主语从句. 第一部分：常规主语从句，即句子在复合句中充当一个主语 主语从句的时态：不受主句的时态影响和限制。（1）That he finished writing the composition in such a short time surprised us all.（2）Whether we will go for an outing tomorrow remains unknown.（3）Who will be our monitor hasnt been decided yet.（4）Whom we
2、must study for is a question of great importance.（5）What caused the accident remains unknown.（6）Whatever you did is right.（7）Whose watch was lost is unknown.（8）What we need is time.（9）What we need are good doctors.小结:（1）引导主语从句连词有 that, whether, who, what, whatever 等（2）连词位于句首不能省略（3）主语从句大多数情况下视为三单,但也有
3、例外,如，例 9。 第二部分：为了防止句子头重脚轻，通常把形式主语 it 放在主语位置，真正主语搁置于句末（1）It is certain that he will win the match.（2）It is true that he has made a very important discovery in chemistry.（3）It is very likely that they will hold a meeting.（4）It is strange that he should do that.（5）It is important that we all should att
4、end the meeting.（6）It is strange that the man should have stuck to his silly ideas.（7）It is a pity that we wont be able to go to the south to spend our summer vacation.（8）It is still a mystery what caused the accident.（9）It is said that he has gone to shanghai.（=He is said to have gone to shanghai）（
5、10）It is known to all that the gun powder was first invented by the Chinese.（11）It is suggested that the work should be done with great care.（12）It seems that he has seen the film.（=He seems to have seen the film）（13）It happened that the two cheats were there. （=The two cheats happened to be there）小
6、结:（1）以that引出的主语从句,常以形式主语it引导.It is +形容词/名词+ that 从句.(2)在有些that从句中要用虚拟语气(should+do / should+have done)例句 4,5,6,11.主语从句与宾语从句两者的用法和在句中的作用是不同的，下面从它们的 各自用法，介绍：)一主语从句主语从句 定义:在句子中担当主语的是一个从句,这个从句就叫做主语从句。主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式 主语 it 代替，而本身放在句子末尾。1. It作形式主语和it引导强调句的比较It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从
7、句的连接词没 有变化。而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成 分，都可用连词that。被强调部分指人是也可用who/whom。例如：It is a pity that you didnt go to see the film.2. 用 it 作形式主语的结构(1) It is 名词从句It is a fact that 事实是It is an honor that 非常荣幸It is common knowledge that 是常识(2) it is 形容词从句It is natural that.很自然It is strange that.奇怪的是(3) it 不
8、及物动词从句It seems that.似乎It happened that. 碰巧(4) it is+过去分词+从句It is reported that.据报道It has been proved that. 已证实3. 主语从句不可位于句首的五种情况(1) if 引导的主语从句不可居于复合句句首。(2) It is said , (reported)结构中的主语从句不可提前。例如：It is said that President Jingo will visit our school next week.(3) It happens., It occurs.结构中的主语从句不可提前。例
9、如：It occurred to him that he failed in the examination.It does nt matter how/whether结构中的主语从句不可提前。例如：It doesnt matter whether he is wrong or not.(5) 含主语从句的复合句是疑问句时，主语从句不可提前。例如：Is it likely that it will rain in the evening?4. What 与 that 在引导主语从句时的区别What引导主语从句时在从句中充当句子成分，如主语.宾语.表语，而that 则不然。例如：What you
10、 said yesterday is right.What he had done was proved to be wrong.1. makes mistakes must correct them.A. What B. That C. Whoever D. Whatever2. It worried her a bither hair was tur ning grey.A. while B. that C. if D. for3. Whe n and why he came hereyet.A. is not known B. are not knownC. has not known
11、D. have not known4. is no reas on for dismissi ng her.A. Because she was a few minu tes lateB. Owi ng to a few minu tes lateC. The fact that she was a few minu tes lateD. Bei ng a few minu tes late5. Tom liked to eat was differe nt from.A. That.that you had expectedB. What that you had expectedC. Th
12、at.what you had expectedD. What.what you had expected6. we go swim ming every dayus a lot of good.A. If.do B. That.doC. If.does D. That.does7.ItBob drives badly.A. thinks that B. is thought what C. thought that D. is thought that8.I ts un certa inthe experime nt is worth doing.A. if B. that C. wheth
13、er D. how9. the boy did nt take medic ine made his mother an gry.A. That B. What C. How D. Which10. we cant get seems bett er tha nwe have.A. What, what B. What, that C. That, that D. That, what11. you dont like him is none of my bus in ess.A. What B. Who C. That D. Whether12. well go camp ing tomor
14、row depe nds on the weather.A. If B. Whether C. That D. Where13. is going to do the job will be decided by the Party com mitt ee.A. That B. Why C. How D. Who14. well fin ish tra nslat ing the book depe nds on the time.A. Whe n B. Why C. What D. That15. he wont go there is clear to all of us.A. How B
15、. What C. Why D. This16. the house will be built will be discussed at tomorrows meeti ng.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. An ybody19. team will win the match is a matter of public con cer n.A. Which B. That C. If D. How20. leaves the room last ought to tur n off the lights.A. Anyone B. The pers on C. Whoever D. Who参考答案1-10 CBACD DDCAA 11-
