had better 后的动词用什么形式

原形
had better:
应该,还是...好
例句与用法:
1.We had better learn by heart as many sentence patterns as we can.
我们最好尽可能多背句型.
2.Even a worm will turn.You had better give her a way out.
弱者被逼太甚,也会进行抗争,你最好还是给她一条出路.
3.We had better get under the lee of the hedge until the rain stops.
我们最好在树篱下躲一躲等雨停.
4.Perhaps you and I had better change over; you are more experienced.
也许我们的工作还是对换一下好,你比我更有经验.
5.You had better have another think.
你最好再想一想.
6.You had better see about rooms for us.
你最好替我们去问问有没有房间.
7.Before reading the book,you had better ask yourself if you have the time.
在读这本书之前,你最好问问自己是否有时间.
8.You had better cross out the last name.
你最好把最后一个名字划掉.