had better的用法

had better 是 最好 的意思
这两个词组合在一起当做情态动词，也就是后面直接加动词原形，否定式在better后加not，再加动词原形。
eg（举个例子）：You had better go out for a walk。（你最好出去走走）
You had better go out .你最好不要出去

注意，You had better 可以写为 You'd better
http://wenku.baidu.com/view/82e090d233d4b14e8524686d.html

had better 译为“最好..”,后面加动词原形，即“had better do”。如：You'd better do your homework now.

had better 译为“最好..”后面加动词原形。如：You'd better go back home because your wife is ill now.

不对，首先这不是祈使句，祈使句的主语是you,其次，凭什么后面的had是必须的意思？正解应该是：这是用了倒装，起强调的作用，其实had
better来回答是可以的，但是根据语境是要进一步肯定，所以用一下倒装来强调语气，变成了better
had.

had better do sth..

You had better wait here. 你最好在这里等。。。