用夸夸其谈造句:be worth doing sth.值得被做某事

be worth doing sth.值得被做某事 be worth doing 什么意思? be used to doing sth? be behind in doing sth be busy doing sth/with sth be behind in doing sth是什么意思啊 be worth doing 和be worth to be done 有什么区别? be worth of 后加动名词吗？跟 be worth doing有什么区别呢？ 请问be worth doing和be worthy of doing有何区别? doing sth