be afraid to do sth害怕做某事
be sure (not) to do sth一定 务必 (不) 做某事
be suitable for sb to do sth 适合某人做某事
be ready to do sth准备去做某事
be hard to do sth 做某事艰难
（sth）be uesd to do sth 某物被用来做某事
be used for doing sth ……被用来做某事
be willing to do sth乐意做某事
be able(unable) to do sth(不)能够做某事
be serious about doing sth 认真对待做某事
be +形容词+ to do sth 做某事怎么样
be +形容词+ enough + to do sth足够的……而可以做某事
be supposed to do sth 被期待做某事、应该做某事
begin to do sth begin doing sth开始做某事
can’t couldn’t wait to do sth迫不及待做某事
decide (not) to do sth决定（不）做某事
encourage sb to do sth 鼓励某人做某事
forget to do sth忘记做某事（事未做）
forget doing sth 忘记做了某事(事情已经做了)
fail to do sth 做某事失败
go on to do sth 继续做另一件事
happen to do sth碰巧做某事
have a change to do sth
= have an opportunity to do sth有机会做某事
help sb to do sth help sb with sth 帮助某人做某事
have (no) time to do sth（没有）有时间做某事
How long does it take sb to do sth?
花费某人多少时间做某事
in order to do sth 为了做某事
invite sb to do sth邀请某人做某事
It’s a good time to do sth做某事的好时候
It’s one’s duty to do sth做某事是某人的职责
It’s +形容词+ for of sb to do sth
做某事对某人来说怎么样(注意for of用法)
It’s time （for sb） to do sth = It’s time for sth该（某人）做某事了。
It’s one’s turn to do sth 轮到某人做某事了
It takes sb some time to do sth花费某人…时间做某事 （注意take的时态, sb用宾格）
like to do sth like doing sth喜欢做某事
learn to do sth 学习做某事
need to do sth 需要做某事、
plan to do sth计划做某事
prefer to do rather than do sth 宁愿做某事而不愿再…..
remember to do sth 记地去做某事
remember doing sth记地做了某事