1.It is said/reported/believed that... (据说/据报道/人们相信......)
例：It is said that he is very rich. (据说他很富有。)
2.as...as... (和......一样......)
例：She is as beautiful as a fairy. (她美若天仙。)
3.such...that... (如此......以至于......)
例：It was such a hot day that we all stayed at home. (天气如此炎热以至于我们都待在家里。)
4.so...that... (如此......以至于......)
例：He ran so fast that I couldn't catch up with him. (他跑得如此快以至于我追不上他。)
5.either...or... (要么......要么......)
例：Either you or I am wrong. (要么你错，要么我错。)
6.neither...nor... (既不......也不......)
例：Neither he nor she likes swimming. (他和她都不喜欢游泳。)
7.not...until... (直到......才......)
例：I didn't go to bed until my father came back. (直到我父亲回来我才睡觉。)
8.It's time (for sb.) to do sth. (是(某人)做某事的时候了)
例：It's time for us to have lunch. (是我们吃午饭的时候了。)
9.had better (not) do sth. (最好(不)做某事)
例：You had better not smoke here. (你最好别在这抽烟。)
10.find/think it + adj. + to do sth. (发现/认为做某事是......的)
例：I find it difficult to learn English well. (我发现学好英语很难。)
11.spend...(in) doing sth. / on sth. (花费......做某事/在某事上)
例：He spends two hours in doing his homework every day. (他每天花两小时做作业。)
12.be worth doing sth. (值得做某事)
例：The book is worth reading. (这本书值得一读。)
13.be busy doing sth. (忙于做某事)
例：My mother is busy cooking dinner. (我妈妈正忙着做晚饭。)
14.prefer to do sth. rather than do sth. (宁愿做某事而不愿做某事)
例：I prefer to stay at home rather than go out. (我宁愿待在家里也不愿出去。)
15.be going to do sth. (打算做某事)
例：I'm going to visit my grandparents this weekend. (这个周末我打算去看望我的祖父母。)
16.be + doing (现在进行时)
例：They are playing basketball now. (他们现在正在打篮球。)
17.have/has done (现在完成时)
例：I have finished my homework. (我已经完成了作业。)
18.used to do sth. (过去常常做某事)
例：He used to play football after school. (他过去放学后常常踢足球。)
19.be + adj. + enough to do sth. (足够......去做某事)
例：He is old enough to go to school. (他到了上学的年龄。)
20.It is + 一段时间 + since + 一般过去时
例：It is two years since I came here. (自从我来到这里已经两年了。)
