clever的比较级是cleverer，最高级是cleverest。clever可以用作形容词，意思是“聪明的；机灵的；熟练的”。例句：How clever of you to do that!你会做那个该是多聪明！I like crows because they are clever.我喜欢乌鸦因为他们是聪明。He was clever to go away at that time.他是聪明的去离开在那个时刻。