That you are leaving is a pity.
What *tters is how you live.
Where he lives is not clear.
Who will stay *kes no difference.
That he has lost his watch is not true, is it?
Whether the football game will be played depends on the weather.
1、It is + 名词 + that从句
It′s a pity that we can′t go.
It is a fact that English is being accepted as an international language.
It is no wonder that he is not hungry; he has been eating sweets all day.
2、It is + 形容词 + that从句
It is certain that she will do well in her exam.
It is probable18 that he told her everything.
Is it true that the scientist will give us a lecture next week?
3、It + 动词 + that从句
It seems that Alice is not coming to the party at all.
It happened that I was out that day.
碰巧我那天外出了。 (= I happened to be out that day.)
It is reported that there was a fire in the super*rket last night.
As is reported, there was a fire in the super*rket last night.
4、It is + 过去分词 + that从句
It is said that Mr. Green has arrived in Beijing.
It is reported that China has sent another *n-*de19 earth satellite20 into orbit21.
It is said that... 据说……
It is reported that... 据报导……
It is well known that... 众所周知……
It is announced that... 据宣布……
It is believed that... 人们相信……
It is thought that... 人们认为……
It is understood that... 自不待言……
It must be pointed out that... 必须指出……
It must be admitted that... 必须承认……
It doesn′t *tter whether she will come or not.
It *kes no difference where we shall have the meeting.
It suddenly occurred22 to her that she had forgotten to lock the door.
Is it possible that they *y complete the task ahead of time?
Does it *tter much that he won′t be able to come tomorrow?
How strange it is that the students are so quiet!
What a shame it is that you cannot stay for dinner!
连接代词what, whoever, whatever, whichever等引导的主语从句不宜用it作形式主语。
Is what he told us really true?
Whichever of you want to come to our party will be welcome.
在It is suggested, ordered, requested, insisted, etc. + that从句中，谓语部分用should + 动词原形，should常被省略。(详见第3章虚拟语气)
It is suggested that we (should) do the experiment a second time.
在It is important, natural, necessary, etc. + that从句中，谓语部分常用should + 动词原形，should常被省略。
It is important and necessary that we (should) keep the balance of nature.
在It is funny, strange, surprising, a pity, a shame, no wonder, etc. + that从句中，有时谓语部分用should + 动词原形，来表达说话者的感*彩，此时should也可省略。
It is a pity that you (should) miss such a good chance.