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。
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.
A谓语是seem, appear, be possible/impossible, be a pity, be a wonder, be likely等。
It appeared to scientists on earth that the stars had moved. It’s a wonder you recognized me.
B在It 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?
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？
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)