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高中英语语法详解：名词性从句中的同位语从句

在复合句中充当同位语。

1. that引导同位语从句。

在下列名词后可用that引导同位语从句answer, belief,doubt, fact, hope, idea, information, knowledge, law, news, opinion, plan, suggestion, thought, truth等。

I had no idea that you were here.

The story goes that william killed his wife.

注意

①同位语从句引导词that无含义，不充当成分，不可省略。

②同位语从句与其说明的名词或代词为同一内容,故可以用is把前边的中心词和从句连接成一个句子。

③同位语从句前一般没有逗号。

that引导同位语从句与引导定语从句的区别：

that引导同位语从句时只起连接作用，不充当任何成分;

that引导定语从句时，在从句中要作成分，如主语、宾语等。

①He told me the news that our team won.(that引导同位语从句)

②The news that / which he told me was very exciting.(that引导定语从句，在从句中作宾语)

2.在no idea, question, problem等后可用wh-疑问词引导同位语从句，if不引导同位语从句。

I have no idea where he has gone. i have no idea what he said.

3.辨析:引导名词性从句时what与whatever, who与whoever的区别：

what 与whatever：

What you want has been sent here. ( what = the thing(s) that/all that/anything that特指)

Whatever you want makes no difference to me.(whatever = anything that泛指)

What caused the accident was a broken bottle.(特指)

Whatever caused the accident has not yet been found.(泛指)

who 与whoever ：

Who will go to beijing on business has not been decided.(who表疑问，表示“谁”，“哪一个”)。

Whoever breaks the law should be punished.(whoever = anyone who，表示“无论哪个人”)

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