精品—名词性从句课件.pptVIP

Unit 1The world of our senseGrammarNoun clause名词性从句 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 一．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 didn’t go to see the film.It doesn’t interest me whether you succeed or not. Ⅰ Subject clause引导主语从句的连词主要有:whetherthat疑问词一.由 that 引导的主从:1. That we shall be late is certain.2. _____________________ is known to all.That the earth is round(地球是圆的)3. ________________________ is a pity.(你错过了这次机会)That you missed the chancethat 不作成分，无意义, 但不能省略.★后接一个完整的陈述句. 注：that 引导的主语从句作主语，谓语用单数。That 引导的主从，常用形式主语it 代替，that 从句后移。That we need time is obvious.It is obvious that we need time. 2. What 引导的主从，what作主语，宾语或表语，表。。。的东西What we need is time.What he said it is true. What 引导的主从，谓语动词视后面的名词而定。isWhat we needtime.What he gave me are two books. 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)W__h_at___you said yesterday is right.It is right what you said yesterday.2) ______she is still alive is a good thing.ThatIt is a good thing that she is still alive. 3. 由whether引导的主从:e.g. Whether he’ll be able to come is not yetknown.Whether we will succeed is still a question.★主语从句不能用if来引导; 陈述语序Ex:1.是否我们要参加这次会议仍未被决定。Whether we shall attend the meeting hasn’tbeen decided yet. 4. 疑问词引导的主语从句what; which; who; whom; when; where;why; how原则:缺什么补什么What he said at the meeting surprised us.Who will win the game is not clear.Where he will go is unknown.Why they have not left yet puzzled me.How we can get there is a problem. Ex.A1.______ makes this shop different is that it offersmore personal services.A.WhatWhoeverB. WhoC. WhateverD.C2.______I can pay back the help that people give memakes me very happy.A.WhereB.WhatC.ThatD.HowA3.It’s not clear ________ was responsible for theaccident.A.Who B.WhatC.HowD.That 二．宾语从句宾语从句就是在复合句中作宾语的名词性从句，通常放在主句谓语动词 (及物动词) 或介词之