同位语从句的引导词

如题所述

① that 在引导的同位语从句中只起引导词的作用,在从句中不充当任何成分,但不可以省略。

He came to the decision that he must act at once .

② whether 引导同位语从句时,在从句中不作成分,意为"是否"不能省略,不能用 if 替换。

He asked her a question whether they can be friends .

③特殊疑问词 how , where , when , why 等引导同位语从句时,在从句中充当句子成分。

I have no idea why he brought that up again .

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