1.used to do sth 过去经常干某事，但现在不干了
2.be used to do sth = be used for doing sth 被用来干某事。
3.be /get used to sth /doing sth .习惯于干某事。
4.allow doing sth允许做某事
5.allow sb to do sth = let sb do sth
6..be allowed to do sth被允许做某事
7.would do sth rather than do sth .
8.would rather do sth than do sth .宁愿做而不做
9.prefer to do sth更喜欢做某事
10.prefer not to do sth更喜欢不做某事
11.prefer to do sth rather than do sth喜欢做某事而不做某事
12.prefer +n / doing sth + to +n / doing sth比起什么更喜欢做某事
13..expect sb to do sth期望做某事
14.notice sb doing sth注意到某事
15.happen to do sth 碰巧干某事
16.keep +sth +for +一段时间
17.ask sb to do sth .叫某人干某事
18.invite sb to do sth 邀请某人干某事
19.There be +名词+ doing sth : 有某东西正在干某事
20.be always doing sth 表示总是干某事,
21.fail to do sth 不能干某事
22.be famous for : 因….而出名
23.be famous as : 作为……而出名
24.be good at doing sth 擅长做某事
25.be supposed to do sth应该做某事
26.mind doing sth 介意干某事
27.make room for 为……腾出空间
28.be fed up with …… 厌倦…….
29.keep +sb +doing sth 表示让某人一直做某事
30.see sb doing sth .看见某人正在做某事
31.see sb do sth :看见某人做了某事
32.can’t afford to do sth负担不起
33.be busy doing sth 忙于干某事
34.It +takes +sb.+时间+to do sth 花费时间做某事
35.It’s +adj +for sb +to do sth 做某事怎么样
36.To do sth + be +adj做某事怎么样
37..It’s +adj +of sb +to do sth 某人做某事怎么样
38.某人+be +adj + to do sth 某人做某事怎么样
39.plan to do sth 计划干某事
40.decide to do sth 决定干某事
41.finish doing sth 结束干某事
42.try one’s best to do sth 尽某人最大努力干某事
43.want sb to do sth 想要某人干某事
44.mind one’s doing sth 介意某人干某事
45.be made to do sth 被迫干某事
46.find it +adj+ to do sth 发现干某事怎么样
47.It’s time for sb to do sth该到某人干某事的时间了
48.How about /What about doing sth ?= Why not do sth ?
49.stop sb from doing sth 阻止某人干某事
50.Let +sb + 动词原形
51.How many+复数名词+are there+介词短语？问数量（可数名词）
52.How much+不可数名词+is there+介词短语？问数量（不可数名词）