It's not polite to ___ at others,(laught),这里面有什么句式吗?

问题描述:

It's not polite to ___ at others,(laught),这里面有什么句式吗?

be polite to do sth.

be polite to doing

laugh at
It is not polite to laugh at others.
嘲笑别人是不礼貌的.
It is (not) polite to .

形容词接to do啊 laugh