句型1.
It (so) happened（chanced） that +clause.
= sb. happened /chanced to do sth.
=sb.did sth.by chance.
如：
It happened that he was out when I got there. 当我到那儿时，碰巧他不在。
＝He happened to be out when I got there.
= It chanced that he was out when I got there
= He was out by chance when I got there.
句型2.
It seems that sb. do/ be doing/ have done/ had done
= Sb. seems to do/ be doing/ have done/to be done/to have been done（还有动词appear等可这样使用）
如:
It seemed that he had been to Beijing before.他好象以前去过北京。
＝He seemed to have been to Beijing before.
句型3.
It is / was＋被强调的部分＋that(who)+剩余的部分.
如：
It wasn't until he came back that I went to bed.直到他回来我才睡觉。(一定要注意被强调句型中的谓语动词否定的转移)。
It was because he was ill that he didn't come to school today.只因为他有病了今天没有来上学。（只能用because而不能用for, as 或since）
It is I who am a student. 我确实是个学生。（句中am不能用are来代替。）
句型4.
It is high time (time/ about time)+ (that) 主语＋should do / did+其它。（从句中的谓语动词用的是虚拟语气。）
如:
It is high time that we should go / went home.我们该回家了。
句型5.
It is / was said ( reported…)＋that+从句.
如：
It was said that he had read this novel.据说他读过这篇小说。
＝He was said to have read this novel.
句型6.
It is impossible / necessary/ strange…that clause.(从句中的谓语用should＋do / should have done，其形式是虚拟语气。)
如：
It is strange that he should have failed in this exam.真奇怪，他这次考试没有及格。
句型7.
It is + a pity/ a shame…that clause.(注意从句中的谓语动词用should do或should have done的形式，但should可以省略。)
如：
He didn't come back until the film ended. It was a pity that he should have missed this film. 他直到电影结束才回来。他没有看到这部电影真可惜。
句型8.
It is suggested / ordered/ commanded /…that +clause.(从句的谓语动词用should do, 但should可以省略。)
如：
It is suggested that the meeting should be put off.有人建议推迟会议。
练习：
1.有人建议我们立刻动身。(It is suggested that ……)
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2.现在的确该停止这场争论了。(It is high time that……)
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3.直到他生了重病，他才知道健康的重要。(It was not until ……that……)
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作者: 纸船。梦 时间: 2011-8-20 14:14
有人建议我们立刻动身.
It is suggested that we should set out at once.
.现在的确该停止这场争论了.
It is high time that we should stop this argument.
直到他生了重病，他才知道健康的重要
It was not until he was seriously sick that he knew the importance of health.作者: e03891 时间: 2011-9-20 11:25
It is very good to see these sentences above.作者: passionjudge 时间: 2011-10-14 11:52
support you作者: vanna 时间: 2011-10-16 11:32
Look Look作者: linda40134 时间: 2011-11-12 20:48
要好好努力學習英文作者: liziming8292011 时间: 2012-7-3 22:34
It is very good,l like作者: zhizhi120 时间: 2012-7-8 22:03
it is too difficult to me. i have forgetten many english words since i graduated from the college ten years ago. even i don't know this sentence is correct or not.作者: 簿子酒 时间: 2012-7-11 09:37
It was you who made us lose the competion.作者: 簿子酒 时间: 2012-7-13 09:36
it is said that she had never ever loved me .作者: laiweibin 时间: 2012-7-16 19:47
It was you who made us lose the competion.
it is said that she had never ever loved me .
i love it