宾语从句的用法归纳总结
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我不知道他想要什么。
误: I don't know what does he want.
正: I don't know what he wants.
宾语从句的引导词
(1) 用 that 引导。 that 只起引导词作用,不充当句子成分,也没有词义,且通常可以省略:
We think (that) he will help us. 我们认为他会帮助我们。
He said (that) he was good at English. 他说他擅长英语。
I know (that) he is very busy. 我知道他很忙。
(2) 用 if 或 whether 引导。 if 和 whether 引导宾语从句,不充当句子成分,但有词义,表示 “ 是否 ” :
I don't know if [whether] he will come. 我不知道他是否会来。
She asked if [whether] that was enough. 她问那是否够了。
I wonder whether [if] it is true. 我不知道是不是真的。
(3) 用连接代词引导。常见的引导宾语从句的连接代词有 what, who, whom, which, whose 等。此时要特别注意宾语从句用陈述句词序,而不用疑问句词序:
Ask him which he wants. 问他要哪一个。
She asked who would like to go. 她问谁愿意去。
Tell me whose wallet this is. 告诉我这是谁的钱包
【注】 what 引导宾语从句时,有时表示 “ 什么 ” ,有时表示 “… 所 … 的 ” 。比较:
I asked what he needed. 你问他需要什么。
I gave him what he needed. 我给了他所需要的东西。