五个肯定句：
You'd better have that tooth pulled out．你最好把那颗牙拔掉。
You had better finish today's assignment，for tomorrow we'll have other things to do．你最好把今天的任务完成，因为明天还有明天的事。
We'd better go now, hadn't we? 我们最好现在去吧?
You had better do whatever he says. 他怎么说你最好就怎么做
I'd better have accepted his offer. 我早该接受他的提议
五个否定句：
You had better not go by air．你最好不要坐飞机去。
You'd better not stay up late. 你最好不要熬夜。
Hadn't we better tell him too? 我们也告诉他不是好些吗?
You'd better not go now because it is raining. 你最好现在别走，因为下雨了。
We'd better not tell the old woman the bad news. 我们最好不要把这个坏消息告诉给老妇人。