同位语从句和定语从句的三点区别.doc

同位语从句和定语从句的区别This is the fact that I told you yesterday.This is the fact that we are poor.一、定语从句是起形容词的修饰作用，而同位语从句则是起补充说明的作用。二、定语从句的引导词在从句中充当一定的成分，可作主语、宾语、状语等；而同位语从句中的引导词在从句只起连接作用，不作任何句子成分。三、引导定语从句的关联词在从句中作宾语或状语时，可以省略或被其他词代替；而同位语从句的引导词一般不能省略，更不能被代替。例如：例1：The reason why he was chosen remains unknown. 他为什么被选上的原因还是不清楚。例2：The idea why he was chosen attracted our attention. 他为什么会被选上，这一想法引起我们的注意。例1中why引导的是定语从句，why可以被 for which或 that 代替;例2中 why引导的是同位语从句，why 不能省去，也不能被其它词代替。四、同位语从句前的名词一般是表示抽象意义的或者有内涵的名词。比如idea, fact, suggestion, truth, promise, order。一般没有复数形式。定语从句的先行词则单复数都会出现。五、连接代词who、which、what和连接副词where、when、why、how、whether亦可引导同位语从句。练习：1. We heard the news that he had told her.2. We heard the news that he had won the game.3.The fact that they didnt finish the work has to be faced.4. Theplanthat Mr.Leedrewuplastweekwasverygood5. Theplanthatweshouldbuildanotherladbuildingwasverygood.6. That question whether we need it has not been considered.