Do not be rude to your elders.

不要对你的长辈粗鲁。

He was very rude to the waiter.

他对服务员的态度非常粗鲁。

She was very rude to the waiter.

她对服务员的态度很粗暴。

It is rude to speak loudly in public.

在公共场合大声说话是粗鲁的行为。

He was shockingly rude to the waiter.

他对服务员令人震惊地无礼。

He oughtn't be so rude to his parents.

他不应该对他的父母这么无礼。

It's rude to boo at a live performance.

在现场表演中发出嘘声是很不礼貌的。

He was rude to the waiter for no reason.

他无缘无故对服务员很粗鲁。

You shouldn't be so rude to your friends.

你不应该对你的朋友这么粗暴。

It's rude to ogle people in public places.

在公共场所色眯眯地看人是很不礼貌的。