英语的语法一直是一个非常重要的成分,是英语学习汇总必不可少的一个基石,在高中英语的学习中,如果能够掌握一个比较全面熟练的语法知识体系,在后续的英语学习过程中会非常容易并且游刃有余,今天就让我们一起来学习关于高中英语语法中的:表语从句以及主语从句吧。
一、表语从句
(资料图片)
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。
二、主语从句
1.定义:用作主语的从句叫做主语从句。
2.构成:关联词+简单句
3.引导主语从句的关联词有三类:
(1)从属连词that。
如:That they were in truth sisters was clear from the facial resemblance between them.很明显,她们确是亲姐妹,她们的脸型很相似。
(2)从属连词whether。
如:Whether he’ll come here isn’t clear.他是否会来这里还不清楚。
(3)连接代词who,whom,whose,what,which,whoever,whatever,whichever 连接副词where,when,how,why。
如:What she did is not yet known.她干了什么尚不清楚。
How this happened is not clear to anyone.这事怎样发生的,谁也不清楚。
Whoever comes is welcome.不论谁来都欢迎。
Wherever you are is my home ---- my only home.你所在的任何地方就是我的家----我唯一的家。
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