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1、名词性从句在句子中起名词作用的句子叫名词从句。名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。 名词性that-从句 1） 由从属连词that引导的从句叫做名词性that-从句。That只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义。名词性that-从句在句中能充当主语、宾语、表语、同位语和形容词宾语。例如： 主语：That he is still alive is sheer luck. 他还活着全靠运气。 宾语：John said that
2、 he was leaving for London on Wednesday.约翰说他星期三要到伦敦去。 表语：The fact is that he has not been seen recently. 事实是近来谁也没有见过他。 同位语：The fact that he has not been seen recently disturbs everyone in his office. 近来谁也没有见过他，这一情况令办公室所有的人不安。 形容词宾语：I am glad that you are satisfied with your job. 你对工作满意我感到很高兴。 2）That
3、-从句作主语通常用it作先行词，而将that-从句置于句末。例如： It is quite clear that the whole project is doomed to failure.很明显，整个计划注定要失败。 Its a pity that you should have to leave.你非走不可真是件憾事。 if, whether引导的名词从句 1）yes-no型疑问从句 从属连词if, whether引导的名词从句是由一般疑问句或选择疑问转化而来的，因此也分别被称为yes-no型疑问句从句和选择型疑问从句，其功能和wh-从句的功能相同。例如： 主语：Whether the
4、plan is feasible remains to be proved. 这一计划是否可行还有等证实。 宾语：Let us know whether / if you can finish the article before Friday. 请让我们知道你是否能在星期五以前把文章写完。 表语：The point is whether we should lend him the money. 问题在于我们是否应该借钱给他。 同位语：They are investigating the question whether the man is trustworthy.他们调查这个男人是否值得
5、信赖。 形容词宾语： Shes doubtful whether we shall be able to come. 她怀疑我们是否能够前来。 介词宾语： I worry about whether he can pass through the crisis of his illness. 我担心他是否能度过疾病的危险期。 2）选择性疑问从句 选择性疑问从句由关联词if/whetheror或whetheror not构成。例如： Please tell me whether / if they are Swedish or Danish. 请告诉我他们是瑞典人还是丹麦人。 I dont ca
6、re whether you like the plan or not. 我不在乎你是否喜欢该计划。 练习一、单项选择。1. Evidence came up _ specific speech sounds are recognized by babies as young as six months old.A. which B. what C. that D. when2. I havent decided _ hotel to stay at.A. which B. what C. at which D. where3. _surprises most of us.A. Wolves
7、are afraid of usB. The fact that wolves afraid menC. The fact that wolves are afraid of menD. Wolves afraid of men4. The announcement _all flight were cancelled because of bad weather greatly distressed the waiting passengers.A. that B. which C. why D. of which5. The question is _can be put into pra
8、ctice.A. how you have learnedB. how what you have learnedC. that why you have learnedD. how that you have learned6. A hinge joint is _ permits the forwards and backward movement of a door.A. that B. what C. those D. which7. One reason why Hamlet is such a successful play is that _.A. it appeals diff
9、erently to peopleB. different people are appealedC. it appeals to many different peopleD. people find it appealing to them very much8. A more important question is _these ideas are well or ill founded.A. where B. when C. how D. whether9. I think it is _you are doing too much.A. because of B. because
10、 C. because that D. because for10. No one could understand _.A. that he was talking about B. what he was talking aboutC. he was talking about D. which he was talking11. I knew nothing about his journey _ he was likely to be away for three months.A. if B. in that C. except that D. which12. The fact _
11、 doctors recommend that children with hypertension drink coffee is surprising.A. what B. is that C. that D. of13. _ is no reason for discharging her.A. Because she was a few minutes lateB. Owing to a few minutes being lateC. The fact that she was a few minutes lateD. Being a few minutes late14. I ha
12、ve no doubt _ he will overcome all his difficulties.A. whether B. when C. that D. if15. The old gentleman never fails to help _is in need of his help.A. who B. whoever C. one D. whomever16. “Is there any particular dessert you would like have?” “_ you select is all right with me .”A. Whatever B. Whi
13、ch C. That D. Whichever17. _ some mammals came to live in the sea is not known.A. That B. What C. How D. Since18. _is his own decision.A. When he is leaving B. When he leavesC. When does he leave D. He leaves19. The people at the party were worried about Janet because no one was aware _ she had gone
14、.A. of where B. of the place C. the place D. the place where20. _ is of no concern to us.A. It rain or not B. If or not it rainsC. Whether it rains or not D. Will it rain or not二、用适当的连接词填空。(what, that, who, whom, whose, which, how, when, where, whatever, whoever, whomever, whichever, however, whenever, wherever, whether, why, because)1. _ he said has nothing to do with this task.2. _ breaks the law deserves a fine.3. Take _ much you want whenever you want to.4. The question remains _ we sho
