"better"后面应该接 动词原形 。在构成"you had better do sth"句型时，"better"后面直接跟动词原形，也就是不带"to"的不定式。例如：

1. You had better go now.

2. She had better stay at home.

此外，"better"还可以用于比较级结构，修饰形容词或副词，表示“更……的”。例如：

1. This book is better than that one.

2. She sings better than her sister.

在特定习语中，"better"也有其独特的用法：

1. "had better"表示“最好……”，后面接动词原形。例如：

You had better finish your homework before you go out.

2. "better off"表示“境况较好地”，后面通常接介词"in"或"at"，用于比较两种选择或情况。例如：

They were better off without him.

3. "better yet"表示“更好的是”，用于提出一个更好的建议或方案。例如：

A new manager could be better yet for the company.

4. "better way"表示“更好的方式”，用于表示对某个任务、问题或挑战的解决方案的看法。例如：

We need to find a better way to communicate our ideas.

这些是"better"的一些常见用法和搭配，希望对你有所帮助。