1.rude作“狂暴的,惊人的,突然的”“简陋的,粗制的”解时,只能用作定语,且无比较等级。
2.rude用作表语时系动词可用于进行体,表示短暂的动作或某种行动是故意做出来的。

用作定语
▲～+n.
 Don't make rude remarks.不要说粗话。
The ship got a rude shock.船受到猛烈的震荡。
They only have rude tools.他们只有些简陋的工具。
用作表语
▲S+be+～
 Don't be rude.休得无礼。
His brother is being rude.他的哥哥变得粗暴无礼起来了。
▲S+be+～+prep.-phrase
 He is rude in manner.他举止粗鲁。
He is rude to me.他对我无礼。
▲S+be+～+to-v
You were rude to say that to your father just now.你刚才对你父亲讲那种话太不礼貌了。
▲It is/was+～+(of sb) to-v
It is rude to point.指指点点是不礼貌的。
It was rude of the salesgirl to talk to the customer like that.那位女售货员那样跟顾客说话太无礼了。

rude, coarse, harsh, rough
参见rough条。

［派生词］ rudely adv.粗暴地；粗野地；无礼地‖rudeness n.粗暴；粗野
［同义词］   abrupt, coarse, crude
［反义词］   graceful, polite, smooth
［词源］＜古法语＜拉丁语rudis(粗的,粗鲁的)