waste的用法：
waste sth.浪费
You're wasting your time.
You waste an opportunity.
be wasted 不能产生效果,未被完全领会
your jokes are wasted on him.
a waste of 时间、金钱等的浪费
it's probably a waste of time.
waste away 消瘦,衰弱下去
i don't want you to waste away.
waste one's breath 白费口舌
i can see that i am wasting my breath.
waste no time 抓紧时间
go to waste 被糟蹋掉
It is a shame to let that food go to waste.
waste sth.in doing sth.
注意：waste 做名词是不可数.但可以加不定贯词 wastes 指的是沙漠
waste 也可用作废水废物
The river was thick with industrial waste.
