You'd better

你最好...

You'd better send him to the hospital.

你最好把他送到医院去。

You'd better change your job.

你最好换份工作。

You'd better not make such a silly mistake again.

你最好不要再犯这个愚蠢的错误了。

A:Where are you going?

你要去哪里?

B:Mike asked me out for dinner.

麦克让我出去吃饭。

A:You'd better not go out because of your bad cold.

你最好不要出去，因为你感冒还没好。

B:But I have promised to come.

但是我已经说好要去了。