名词性从句whether与if.ppt

名词性从句 用if 或whether 填空 1. I don’t know __________ I’ll be free tomorrow. 2. I don’t know _______ or not I’ll be free tomorrow. 3. The question is ______ this book is worth writing. 4. It depends on ______ we will have enough money. 5. ______ they can do it matters little to us. 6._______ you are not free tomorrow , I’ll go without you. 用that 或what 填空 1. I wonder if this is ______you are looking for. 2. Our school is quite different from _______ it was before. 3. Father made a promise ______ if I passed the examination he would buy me a computer. 4._______ I can’t understand is why he has changed his mind. 5._______ the earth is round is known to us all. 选择填空（what,whatever,who,whoever) 1._________ was said here must be kept secret. 2. _______we need is more time. 3._______ made the long distance call to him is not important. 4._______ breaks the law will be punished. 5. ________ leaves the room last ought to turn off the lights. * * 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。 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, why 1。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。 辨别下列名词性从句的类别： 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. 主语 宾语 表语 同位语 宾语 主语 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 　 that-从句作主语通常用it作先行词，而将that-从句置于句末，例如： Its a pity that you should have to leave. It is not yet decided who will do that job. 用 it 作形式主语的that- 从句有以下搭配关系： a. It + be +形容词+ that-从句 　It is necessary/ important / obvious/certain… that… b.It + be +名词+ that-从句　 It is a pity/a shame/no