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had better / had best 的意義和應用

1. had better / had best 表示一種勸告或建議，意思為：最好。had better與 had best意義和用法相同，只不過后者比前者的意思更強烈，因此，一般使用前者。如：

You’d better get some sleep. 你最好去睡一會兒。

We’d better be off. 我們最好走吧。

You’d better apologize to him right now. 你最好馬上給她道歉。

You had better put on your coat when you go out. 你出門時，最好穿上大衣。

I have not yet decided as to what papers it had better be sent to. 還沒決定最好把它寄給哪些 報紙。

2. had better / had best 一般不用于疑問句中，但可用于否定句中，其否定形式為：had better / had best not。如(from m.52ysedu.com)：

I’d better not disturb him. 我最好不要去打攪他。

You’d better not play computer games. 你最好不要玩電子游戲。

You had better not talk with strangers. 你最好不要跟陌生人說話。  

We’d better not go until your sister arrives. 我們最好等你姐姐到了再走。

We had better not bring this up now. 我們最好現在暫不提此事。

Better not wait for him.  最好不要等他。