It 句型小结
1.It is/was + 被强调部份 + who/ that + 句子的其它成份 2.It be/become + adj./n.+(for sb.) + to do…/ that…
3.It took/was/will take/will be + 一段时间 + before… 过多久才（就）…, …之后才…
此句型中谓语动词多用过去时和将来时.4.It is time + for sth./ to do sth./ that … 该是…的时候了。
后接that从句时谓语动词常用过去式或should+动词原形
5.It is the first/second…time (that) … 第一/二次…
由于time前有序数词修饰，从句谓语动词常用完成时态，且和主句时态保持一致。
6.It looks/seems as if … 看起来好像…
7.It is said/reported/thought/considered/believed/announced/expected… + to do…/that…
据说/据报道/据认为/据相信/据宣布/据期望…
8.It takes (sb.) some time to do sth.做某事花费多少时间 9.It is no use/good + doing sth.做某事是没用/好处
10.It seems/looks/appears/happens + that … 似乎/看起来/好像/碰巧
11.think/make/believe/find/feel/consider+ it + adj./n.+ to do/doing/that-clause
There be句型的小结
1.There used/seem/ happen/appear to be 2.There is no sense in doing 做某事是没有用的，没有意义的 3.There is no use /good doing 做某事是没有用的，没有必要的 4.There is no need to do 没有必要做某事
5.There is thought/said/reported to be 人们认为有/据说有/据报道有 6.There is no doing（口语）不可能…….
