【编者按】精品学习网英语四六级频道为大家收集整理了“英语六级语法复习:hadbetter表示最好”供大家参考，希望对大家有所帮助!
had better 相当于一个助动词，它只有一种形式，它后面要跟动词原形。
had better do sth
had better not do sth
It is pretty cold. You‘d better put on my coat.
She‘d better not play with the dog.
had better have done sth表示与事实相反的结果，意为"本来最好"。
You had better have come earlier.