精选优质文档-倾情为你奉上表语从用法1. 定义：用作表语的从句叫做表语从句2. 引导表语的从句的关联词的种类（1） 从属连词that. The trouble is that I have lost his address.The reason was that he was late for school.(2)从属连词whether, as, as if He looked just as he had lookedten years before.The question is whether they will be able to help us.注：从属连词if一般不用来引导表语从句，但as if却可引导表语从句。All this was over twenty years ago, but its as if it was only yesterday.The key is whether we can solve the problem.It looked as if it was going to rain.
