提建议的句型：
Why don’t you do（动词原形）sth？为什么不做某事呢？eg：Why don’t you hang out with us？
Why not do sth？为什么不做某事呢？
eg：Why not hang out with us？
What/How about doing sth? 做某事怎么样？
eg：What/How about going to the movies?
Let’s do sth. 让我们做某事吧
eg：Let’s take the dog for a walk.
You’d better (not) do sth 你最好做（不做）某事
eg：You’d better take a taxi to school.
Would you like to do sth?/sth? 你想要的做某事吗？
eg：Would you like to sweep the floor?
You/We could do sth. 你们（我们）可以去做某事
eg：You could buy your brother a schoolbag.
You/We should do sth. 你们（我们）应该去做某事
eg：We should ask for teacher’s help.
Shall we do sth? 我们去做某事，好吗？
eg：Shall we go shopping together?
回答：
同意对方的建议
Good idea./That’s a good idea. 好主意
OK,/All right./Great.好/行/太好了
Yes，please./I’d love to. 是的，请吧/我愿意
No problem. 没问题
Sure./Of course./Certainly. 当然可以
I agree with you.
I can’t agree more. 非常同意
委婉拒绝别人建议
Sorry，I can’t.
I’d love to./I’d like to,but 我很乐意，但是
I don’t think so.
I’m afraid...
Sorry,but...
What a pity! I have to ... 真遗憾！我得......。