一、表语从句的引导词

引导表语从句的词有连词that, whether，连接代词和连接副词，关系代词型what，以及as if, as though, because等连词。

1. 由that引导

The fact is that he doesn’t really try. 

事实是他没有做真正的努力。

The trouble is that I have lost his address. 

麻烦的是我把他的地址丢了。

My suggestion is that we should tell him. 

我的建议是我们应该告诉他。

His sole requirement was (is) that the system work. 

他唯一的要求是这个制度能起作用。

My idea is that we should start making preparations right now. 

我的意见是我们马上就开始做准备工作。

2. 由whether引导

The question is whether the film is worth seeing. 

问题是这部电影是否值得看。

【注意】whether 可引导表语从句，但与之同义的if却通常不用于引导表语从句。

3. 由连接代词引导

You are not who I thought you were. 

你已不是我过去所想像的人。

The problem is who we can get to replace her. 

问题是我们能找到谁去替换她呢。

The question is who (m) we should trust. 

问题是我们应当相信谁。