他因为不礼貌被罚站。

He was punished for his misbehavior.

他的不礼貌让大家都很不高兴。

His misbehavior made everyone very unhappy.

在课堂上不礼貌是不被允许的。

Misbehavior in the classroom is not allowed.

她的不礼貌行为让老师很生气。

Her misbehavior made the teacher very angry.

这种不礼貌的行为需要被纠正。

This kind of misbehavior needs to be corrected.

如果你不鞠躬是不礼貌的。

It's impolite if you don't bow.

吃完就离开是不礼貌的。

It is not polite if you leave as soon as you finish eating.

用筷子指着别人是不礼貌的。

It's impolite to point at anyone with your chopsticks.

在中国，用筷子敲空碗是不礼貌的。

In China, it's impolite to use your chopsticks to hit an empty bowl.

是的，让别人等待是非常不礼貌的。

Yes, it's very impolite to keep others waiting.