make a proposal

make a suggestion

give advice

口語中習慣用why not

如：Why not try it again? 為什麼不再試試呢？

1、Shall we … ? 例：Shall we go skating tomorrow?

2、You"d better (not) do sth 例：You"d better not climb that tree, or you"ll hurt yourself one day.

3、I advise you (not) to do sth. 例：He"s not a good boy. I advise you to keep away from him.

4、I suggest (that) you (should) do sth.例：I suggest you eat less food and take more exercise.

5、why not ...？為什不呢？

6、You"d better (not) do sth. 你最好（不）做某事。

7、why don"t you do sth? 你為什麼不？

8、advise sb (not) to do sth 勸告某人（不）做某事。

9、Let sb do sth .讓某人做某事

10、What do oyu think of doing sth? 你認為做某事？

11、shall we do sth?讓我們一起做吧。