1. too(for sb) to 太以致不能 so that not enough to do
The boy is too young to go to school. 那男孩太小了以致不能上学。
2. try/do ones best to do sth 尽力去做某事
try to do sth 试着（图）做某事
3. used to do sth 过去常做某事( used to be + adj/a +n)
Mr wang used to be a teacher worker. 王先生过去是一位工人。
I used to live in the country. 过去我住在农村。
4. want/would like to do sth 想做
want/would like sb to do sth 想某人做
feel like doing sth 喜爱做某事（注意like后接动词ing形式）
5. warn sb (not) to do sth 警告某人做某事（或不要做某事）
6. 为什么不（表建议的句型，注意用动词原形）
Why dont you do sth ?
Why not do sth ?
表示建议的句型还有：What How about?（如果是动词，要用ing形式）
Shall we?
7. Would you like (sb) to do sth ?Yes, Id love to .
8. Would you mind doing sth ? 你介意做某事吗？
Never mind/Not at all/of course not/certainly not . （从不介意/一点也不介意/当然不会了）
9. Would you please (not) do sth 你可不可以不做？
10. finish doing sth enjoy doing sth practise doing sth
be good at doing sth stop sb from doing sth go on doing sth
be busy doing sth see/hear/watch sb doing sth
feel like doing sth hate doing sth like doing sth
do well in doing sth be afraid of doing sth
be interested in doing sth make a contribution to