`better` 后面通常跟动词原形，构成 `you had better do sth` 句型，中文翻译为“你最好做某事”。例如：

You had better wear a coat. 你最好穿上外套。

He had better stay at home. 他最好待在家里。

`better` 也可以用于比较级结构，表示“更好的”。例如：

This book is better than that one. 这本书比那本书好。

He is better at English than at math. 他英语比数学好。

`better` 后面还可以跟介词 `off`，构成短语 `better off`，意为“境况（尤指经济性）较好的”。例如：

Being unemployed is better off than being underpaid. 失业比收入不足要好