youdbetter后面加什么形式

you’d better全拼为you had better，后面直接加动词原形，也就是不带to的不定式，构成you had better do sth.句型。意思是你最好做某事。

例句：

1、I think you'd better tell us why you're asking these questions.

我想你最好告诉我们你为什么要问这些问题。

2、Now that you are here, you'd better stay.

既然你已经来了，最好还是住下。

3、Maybe you'd better tell me what this is all about

也许你应该告诉我这究竟是怎么回事。

4、You'd better go and make amends to him. I'm sure he'll forgive you.

你最好是负荆请罪，我相信他会原谅你。

had better do sth. 最好做某事。这是固定搭配, 适用于各种人称和数。 had可与主语缩写也可不缩写。