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对付接触英语不久或是谈不上深刻的英语进修者，除最简略的主谓宾、主系表布局以外，接触至多的要数It句型了。但是，虽多见却其实不能为所欲为的利用，只有如法泡制的工夫，谈不上把握。究其缘由，在于中英文思惟的差别和句型的多变。
在这篇文章里，我会把It句型举行细致的总结，但愿会对你的英语写作和翻译有所帮忙。感激支撑和存眷，吴坚不崔
It句型的分类
It is+adj+to doIt is+adj（kind, wise, foolish, clever便可以指“事”也能够指“人”）+of+sb+to doIt is+adj（easy, necessary, possible, safe, co妹妹on, normal）+for+sb+to doIt is( important, natural, necessary, strange) that (谓语要用should+动词)It+be+V-ed(said, reported, believed, suggested)+that从句It is (high time, time, about time)+(that) +主语+谓语（用should+动词，或一般曩昔时）It+be+(a pity, a shame, a fact, good news)+that 从句It is useless /no use/ no good +doingIt is+时候段+since指导的时候状语从句，译为“自从……以来已多久了”It is+时候段+before指导的时候状语从句，译为“过量久才……”It+be+时候点+when指导的时候状语从句It is the first(second…)time+that sb has done ,译为“这是或人第…次做…”It + is/was +被夸大的部门+ that/who 从句It is+adj+to do
it作情势主语或情势宾语的环境：
It is wrong to tell a lie. 扯谎是不合错误的。
注：it作情势主语，真实的主语是不定式to tell a lie
He does not think it wrong to tell a lie. 他不认为扯谎是不合错误的。
注：it作情势宾语，真实的宾语是不定式to tell a lie
若是还原到中文的语序，应当是：
To tell a lie is wrong.
但是英文极罕用不定式作主语，除少少数的句子外:
To teach is to learn.To eat is to live.It is+adj（kind, wise, foolish, clever便可以指“事”也能够指“人”）+of+sb+to do
It is wise of him to make such a decision.他做出如许的决议是明智的。It is kind of you to do so.你这么做真是太好了。It is foolish of him to set himself to perform an impossibility.他让本身做一件不成能的事是愚笨的。注：of与for的区分在于，for前的形容词如impossible、necessary指“事”而不指人。of前的形容词如kind、foolish便可以指“事”也能够指“人”。
It is+adj（easy, necessary, possible, safe, co妹妹on, normal）+for+sb+to do
It is very dangerous for children to play with fire.孩子们玩火是很伤害的。It is not easy for us to learn English well. 对咱们来讲学好英语其实不轻易。It is necessary for you to do so.你有需要如许做。It is( important, natural, necessary, strange) that (谓语要用should+动词)
It is strange that she should go out without saying a word.奇异的是，她居然一声不响就出去了。It is important that we should speak politely.咱们措辞要有礼貌,这的很首要的.It+be+V-ed(said, reported, believed, suggested)+that从句
It is suggested that the book (should) be revised.有人建议点窜这本书。It is said that Tom has been back from abroad.听说汤姆已从外洋回来了。It is (high time, time, about time)+(that) +主语+谓语（用should+动词，或一般曩昔时）
It is (high/about) time (that) we handed in/should hand in our homework.该是咱们交功课的时辰了。注重:about/high是用于增强语气，暗示“早是做甚么的时辰了”that从句用should或动词一般曩昔时表虚拟。It+be+(a pity, a shame, a fact, good news)+that 从句
该句型中，从句一般用(should) + 动词真相，暗示出乎料想，译为＂居然＂。
It is a pity that such a thing ( should ) happen in your class.这类事居然产生在你们班上，真是遗憾！It is a shame that we cannot all do what we want to do in life. 人生中，咱们不克不及老是为所欲为，这是一种遗憾。It is a fact that the earth goes around the sun.地球绕着太阳转是究竟。It is useless /no use/ no good +doing
It is no use speaking in soft,gentle tones if everyone else is shouting.若是他人都在叫嚷，用柔和、柔和的腔调措辞是没有效的。It is no use starting late in life to say: “I will take an interest in this or that.”比及老了才说“我要培育这个乐趣阿谁乐趣”，那是没用的。It is no use doing what you like; you have got to like what you do.做你喜好的事是没有效的；你必需喜好你做的事。It is+时候段+since指导的时候状语从句，译为“自从……以来已多久了”
It is 5 minutes since the bus left. 公汽开走已有5分钟了It is+时候段+before指导的时候状语从句，译为“过量久才……”
It will be 3 hours before he comes back.要过三个小时他才会回来It was 3 hours before he came back. 过了三个小时他才回来It+be+时候点+when指导的时候状语从句
It will be Monday when he comes back. 他周一的时辰回来.It was Monday when he came back. 他周一回来的.It is the first(second…)time+that sb has done ,译为“这是或人第…次做…”
It was the first time she’d discovered something she 
really didn’t want to find,and she didn’t know what to do once she’d found it. 这是她第一次发明她真的不想发明的工具，一旦发明了，她不晓得该怎样办。It is the third time that I have seen the film.这是我第三次看这部片子了。It + is/was +被夸大的部门+ that/who 从句
It was last week that I met an old friend in the street.It was because he was ill that he didn’t come to school yesterday.注重：夸大缘由状语从句时，只能夸大由because所指导的从句.
①夸大句型中的主谓一致
It is you，rather than he，that are to blame for the accident．是你，而不是他，才是变乱的祸首罪魁。②插入从句的夸大句型
It was in the restaurant where we had dinner last Sunday that you left your wallet．上周日咱们用饭的那家餐馆里，你把钱包忘在那了。③夸大句型的一般疑难句、特别疑难句情势
一般疑难句：Is / Was it + 被夸大部门+ that + 句子其余部门 ?
Was it in 1933 that the Second World War broke out?第二次世界大战是在1933年暴发的吗？特别疑难句：疑难词+ be + it + that + 句子其余部门?
When was it that he changed his mind to take part in the activity？他是何时扭转了主张加入勾当?④夸大句型用于名词性从句, 特别注重要
利用报告语序。
I don’t know when it was that he changed his mind to take part in the activity？我不晓得他是何时扭转主张加入这项勾当的？⑤not until用于夸大句型
It is / was not until ＋被夸大部门＋ that ＋其他部门
It was not until midnight that she went back home.直到午夜她才回家。
