表语从句就是用一个句子作为表语。说明主语是什么或者怎么样,由名词形容词或相当于名词或形容词的词或短语充当,和连系动词一起构成谓语。

表语从句只能置于主句之后,而主句的动词只能是联系动词。

例如:

The problem is how we can get the things we need.

问题是我们怎样能弄到我们需要的东西。(how 在表语从句中充当方式状语)/

The scissors are not what I need.

这把剪刀不是我所需要的。(what 在表语从句中充当宾语)

What I told him was that I would find him a good play.

我告诉他的是我会给他找个好剧本。(what在主语从句中作直接宾语, that作为表语从句的引导词在该表语从句中不充当句子成分, 不能省略)

That is what I want to tell you.

那就是我想要对你讲的。(what在表语从句中充当直接宾语)


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