名词从句又可分别称为主语从句.doc

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。1.How the book will sell depends on its author. 2.John said that he was leaving for London on Wednesday.3.The fact is that he has not been seen recently.4.The fact that he has not been seen recently disturbs everyone in his office. 5.He will talk to us about what he saw in U.S.6.It is impossible that I go and attend the meeting.引导名词性从句的连接词可分为三类： 连接词：that, whether, if连接代词：what, whatever, who, whoever, whom, whose, which.连接副词：when, where, how, why1。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，宾语从句中可省略2。不充当介宾3。 引导主语从句、表语从句和同位语从句,that不可省略。That/wh-clause + v +主语从句S +be/link.v + that/wh-clause表语从句S + vt + that/wh-clause宾语从句S + vi + prep + wh-clause宾语从句 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It 作形式主语It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。例如： It is a pity that you didnt go to see the film. It doesnt interest me whether you succeed or not.2. what 与that 在引导主语从句时的区别what 引导主语从句时在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： 1) _you said yesterday is right.2) _she is still alive is a good thing. It is a good thing that she is still alive表语从句表语从句在复合句中作表语的名词性从句，放在系动词之后，一般结构是“主语连系动词表语从句”。可以接表语从句的连系动词有be, look, remain, seem等。另外，常用的还有the reason is that 和It is because 等结构。引导词有：that,how,whether,why,例如：1) The question is _ we can make good preparation in such a short time.2) This is _ we cant get the support of the people.3) But the fact remains _ we are behind the other classes.4) The reason _ he is late for school is _ he missed the early bus. whether 与 if 均为 “是否” 的意思。但在下列情况下，whether 不能被 if 所取代：1. 主语从句Whether he will come is unknown. 表语从句，如：The question is whether you should accept it.3. 同位语从句，如：The question whether hell attend the meeting is not decided4. 从句作介词的宾语，如： It depends on whether we have got enough money. 用if 或whether 填空w 1. I dont know _ Ill be free tomorrow.w 2. I dont know _ or not Ill be free tomorrow.w 3. The question is _ this book is worth writing. 4. It depends on _ we will have enough money.w 5. _ they can do it matters little to us.w 6._ you are not free tomorrow , Ill go without you.w 1) This is what I want.w 2) Xiao Li is no longer what he used to be.w 3) That is why / how he caught cold yesterday.w 4) What he wants to know is whether we can finish our work by tomorrow morning.w 3. As if, as though, because, as, just as 引导的表语从句w 1) It looks as if we will be late.w 2) The patient looked as if he had been ill for a long time.w 3) It may be because I didnt have a good sleep yesterday evening.w 4) Things were not as they seemed to be.翻译以下句子，并指出带下划线的从句属于名词性从句中的哪一种。1.What he wants is a book.2.It is so nice that we can learn this grammar point together.3.Im so glad that I can make friends with you.4.This is why he did it.5.Do you agree to the suggestion that we (should) have a trip in Tibet?6.That he wants a book is certain.7.I suggested just now we (should) take part in this activity.8.Whether you like him or not doesnt matter too much.9.He doesnt know whether you can sing it