如题所述
1.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谓语动词否定的转移,及形式).
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.）
2.It is high time (time/ about time) (that) 主语＋should do / did+其它.（注意从句中的谓语动词用的是虚拟语气）
It is high time that we should go / went home.我们该回家了.
3.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
.4.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.
5.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
.6.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.
7.It is/was＋表示地点的名词＋where+从句.（注意本句不是强调句型,而是以where引导的定语从句.）
如：It was this house where I was born.
请比较：It was in this house that I was born.(后一句是强调句型.)
扩展资料:
it句型归纳复习
1．It is said（reported，learned．．．）that．．．
该句型中的it是形式主语，真正的主语是that引导的主语从句。该结构常译为“据说（据报道，据悉……）”。
It is said that he has come to Beijing．据说他已经到北京了。
2．It is．．．since．．．
该句型主要用作处理非延续性动词的完成时，又要和表示一段时间的时间状语连用的问题。主句中是时间作表语，其时态是现在时或完成时，since引导的从句通常是一般过去时态，而且是非延续性动词。如果主句是一般过去时，从句则用过去完成时。
It is（has been）5 years since his father died．他父亲去世已经5年了。
3．It happens（seems，looks，appears）that．．．
该句型中it是形式主语，that引导的是主语从句，主句中的happen，seem等词是不及物动词。
It happened that he met his teacher in the street．碰巧他在街上遇见了老师。
It seems that he will be back in a few days．看来他几天后就会回来了。
4．It takes sb．some time to do sth．
该句型中的不定式是真正的主语，it是形式主语，常译为“做……要花费某人……时间”。
It took thousands of people and many years to build the Great Wall．成千上万的人用了许多年的时间才建起了长城。
5．It is kind（of sb．）to do sth．
该句型中的不定式短语是真正的主语，如果不定式的逻辑主语是由of引出的，句中的形容词必须是能表示逻辑主语特征的形容词。常见的有：bad，brave，careless，clever，foolish，good（好心的），honest，horrible，kind，lazy，naughty，nice（有教养的），polite，stupid，wise，wrong等。这个句型可以改写为：sb．is kind to do sth．
It is kind of you to say so．你这样说真是太好了。
（＝You are kind to say so．）
6．It is necessary（for sb．）to do sth．
该句型与第5点同属一个句型。如果不定式的逻辑主语是由for引起的，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的形容词。常见的形容词有：① important，necessary，natural②easy，safe，common，normal，hard，difficult，dangerous，unusual，rare，impossible，pleasant等。
在①中的形容词作表语可以用从句改写，如：
It is important for her to come to the party．＝It is important that she（should）come to the party．
