哪些從句作主語(yǔ)時(shí)可用it作形式主語(yǔ)

原則上說(shuō)，it用作形式主語(yǔ)可以代替下列從句：

1. that從句

It is quite clear that he has read the book. 很顯然，他讀過(guò)這本書(shū)。(HM)

2. what從句

It doesn’t matter what he says. 他說(shuō)什么沒(méi)關(guān)系。(HM)

It was clear enough what he meant. 他的意思是很明顯的。

3. who從句

It hasn’t been decided who will be sent to work there. 還沒(méi)決定將派誰(shuí)到那里工作。

4. how從句

It struck her how gentle he was being. 她深深感到他多么溫存。

5. when從句

It hasn’t been made clear when the conference is to take place. 會(huì)議什么時(shí)候召開(kāi)還沒(méi)有宣布。

6. where從句

It’s not known where she went. 她到哪里去了沒(méi)人知道。

It did not matter much where he lived. 他在哪里住都沒(méi)有關(guān)系。

7. why從句

It was clear why he had asked for a conference. 他為什么要求召開(kāi)會(huì)議原因很清楚。

8. whether從句

It makes little difference whether we go or stay. 我們?nèi)ミ�是留沒(méi)有多大差別。

It’s not yet settled whether I am going to America. 我去不去美國(guó)還沒(méi)定。