you✀d better是什么的缩写

是you had better 你最好
■在口语中常省略成’d better或better.如：
你最好小心点.
正：Youhad better be careful.
正：You’d better be careful.
正：Better be careful.
■注意否定式、疑问式及其回答.如：
You’d better not go there.你最好不要去那里.
He’d better go with us,hadn’t he?他最好同我们一块去,对吗?
What had we better do?我们最好做什么?
Had we better not go?我们不去好不好?
比较：Hadn’t we better go?我们去不是更好吗?
■可接进行式、被动式或完成式.如：
I’d better be going now.现在我得走了.(心情近切)
She’d better be met by him.最好他去接她.
You’d better have done that.你要是把那件事办了就好了.
■注意：1.此结构中的 had 永远不可改为 have 或 has；2.对上级或长辈不宜用此结构.