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主语从句的用法
asked Mar 14, 2019 in Questions about English Grammar by 116070100234hyy (290 points)
recategorized Nov 13, 2020 by Ariel | 486 views

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主语从句是在复合句中充当主语的从句,主语从句的引导词有:

连词:that, whether

连接代词:who, whoever, whom, which, whichever, what, whatever

连接副词:when, where, how, why等。

1. that引导主语从句时,that不作成分,但不能省去。

That light travels in straight lines is known to all.

That she is still alive is a consolation.

2. 有时为了使句子结构平衡,避免“头重脚轻”,常用it作形式主语,而把从句放在后面。

(1) It is +名词+从句

It is no surprise that Bob should have won the game.

(2) It is + 形容词+从句

It is obvious that conductors and insulators are both important in industry.

(3) It is + 过去分词+从句

It was required that they should finish their homework on time.

(4) It + 不及物动词+从句

It happened that I saw him yesterday.

3. whether引导

Whether it will do us harm remains to be seen.

4. 连接代词引导的主语从句

Which plan is better should be discussed.

5. 连接副词引导的主语从句

How it was done was a mystery.

[1]劉紅梅.主語從句的用法歸納[J].現代閱讀(教育版),2013(10):159.
answered Oct 22, 2020 by Ariel (34,470 points)
edited Oct 27, 2020 by Ariel

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