youd better即you had better，后面加動詞原型，構成you had better do sth.句型。意思是"你最好做某事”。這是固定搭配，適用于各種人稱和數(shù)。had可與主語縮寫也可不縮寫。

you'd better 后加什么

you’d better后面直接加動詞原形，也就是不帶to的不定式，構成you had better do sth句型，意思是你最好做某事。

實際上，had better do sth是固定搭配，意思是最好做某事，因為bad better是情態(tài)動詞，而情態(tài)動詞的后面接動詞原因，所以had better的后面就接do sth。舉例如下：

1、You'd better see a doctor about that cough.

你最好找醫(yī)生治治你的咳嗽。

2、You'd better look sharp or you'll be late.

你得快點，不然就遲到了。

you'd better例句

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

我想你最好告訴我們你為什么要問這些問題。

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

既然你已經(jīng)來了，最好還是住下。

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

也許你應該告訴我這究竟是怎么回事。