主语从句不放在句首的四种情况

接下来总结一下什么时候主语从句不能放在句首。

(1)含主语从句的复合句是疑问句、感叹句时,主语从句不可提前,用引导词it作形式主语。

Is it really true that he has gone abroad?他真的出国了吗?

How surprising it was that he failed in the exam!真令人惊奇,他考试没有及格!

(2) It is said, reported, .结构中的主语从句不可提前。

      It’s said that the play is very interesting据说戏剧很有趣。

      It’s reported that the highway will be opened to traffic next week据报道,高速路下周通车。

(3) It happens, occurs…结构中的主语从句不可提前。

      It occurred to her that she had forgotten to lock the door她突然想起忘了锁门。It happened that I met him in the street我恰巧在大街上遇到了他。

(4) It doesn’t matter how, whether or not..结构中的主语从句不可提前。It doesn’t matter whether he likes it or not他喜欢与否无关紧要。It doesn’t matter how he will come.他怎么来不重要。

主语从句用it作形式主语

 当主句中充当主语的从句过长时需it 做形式主语,且将从句放在句末。看下面的句子:

原本句子应该是这样: That the temple was rescued was right .然后主语从句作主语可以用it来代替,把主语从句放在句末,然后就变成了这个样子:

It was right that the temple was rescued.

在主语从句中有三种情况,需用形式主语it,而将真正的主语从句放在句尾

A谓语是seem, appear, be possible/impossible, be a pity, be a wonder, be likely

It appeared to scientists on earth that the stars had moved. It’s a wonder you recognized me.

BIt is known...,It is said…,It is hoped…,It is believed…等惯用的被动结构中。

It is believed that before writing was developed, people in China used to keep records by putting a number of stones together.

C 当含主语从句的复合句为疑问句是必须用it 作形式主语。

Is it likely that it will rain this evening?

什么是主语从句

很多学生在课堂上经常问道,什么是主语从句,今天我给大家说一说。

主语从句其实就是在主句种作主语,一个例子吧

The game is exciting.在这个句子里,the game作主语,再看下面的句子:

What you said is exciting. 在这个句子里, What you said 作主语,也就是一个从句作主语,大家能理解吗?

再给大家举几个例子:

That he lost his job is disappointing.(左边加粗的部分是主语)

What you talked about was boring. (左边加粗的部分是主语)

上面举的例子中加粗的部分就是所谓的主语从句了。