why not 。。。?为什不。。。呢?
You'd better (not) do sth. 你最好(不)做某事
why don't you do sth? 你为什么不。。。?
advise sb (not) to do sth 劝告某人(不)做某事
Let sb do sth 让某人做某事
What do oyu think of doing sth? 你认为做某事。。。。?
shall we do sth?让我们一起。。。。。。吧
用should ,ought to,have to,must等情态动词提建议时,用should和ought to语气比较委婉、客气;用have to, must语气比较直率。
Let's do sth
或 shall we。。。
或 how about。。。
You'd better do sth..
Why not do sth.?
Shall we do sth.?
Let's do sth.