表语从句
1.定义:用作表语的从句叫做表语从句。
2.构成:关联词+简单句
3.引导表语从句的关联词的种类:
(1)从属连词that.如:
The trouble is that I have lost his address.麻烦是我把他的地址丢了。
(2)从属连词whether,as,as if.如:
He looked just as he had looked ten years before.他看起来还与十年前一样。
The question is whether they will be able to help us.问题是他们是否能帮我们。
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,如:
All this was over twenty years ago,but it’s as if it was only yesterday.
这都是20多年前的事了,但宛如昨天一样。
能跟表语从句的谓语动词一般为系动词be,seem,look等。如:
It looked as if it was going to rain.看起来天要下雨了。
(3)连接代词who,whom,whose,what,which,whoever,whatever,whichever
连接副词 where,when,how,why.
如: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 how he did it.问题是他是如何做此事的。
That was what she did this morning on reaching the attic.那就是她今晨上了阁楼干的。
解释:
1.连词because可引导表语从句。如:
I think it is because you are doing too much.我想这是因为你做得太多。
2.在一些表示“建议、劝说、命令”的名词后面的表语从句中,谓语动词用虚拟语气。should+动词原形表示,should可省略。如:
My suggestion is that we (should)start early tomorrow.我的建议是我们明天一早就出发。