know bertter than that的用法

一般我们使用的时候都是这样的:

know better than+不定式。这种结构意为“不至于”：

She knows better than to go alone on such a night.
在这样的夜晚，她不至于连不宜单独外出也不知道。

know better than to do sth.的含义是be wiser,better informed,or more
sensible than to do or believe sth.

口语中常用到：

I know better than that!
我才不信呢!