高中英语主语从句语法解释

高中英语语法 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 hell come here isnt 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。

解释：

1． 主语从句能用it作形式上的主语。常以it作形式主语的句型有：

A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+that从句。如：

It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。