it is a waste to do sth与it is wasteful to do sth有区别吗?他们的用法?

it is no use doing sth.与it is no use to do sth.的区别 It is no use doing sth与It is no use to do sth的区别. it is +adi of sb to sth 与 It is +adj for sb to do sth 的区别有哪些 It is time to do sth和It is time for sth有区别吗? It is+形容词+for sb to do sth与It is+形容词+of sb to do sth有什么区别? it +形容词+to do sth 和it is +形容词+to do sth 有什么区别? It is worthy to do sth有这种用法对吗? it difficult to do sth 和it is difficult to do sth 的区别 It is a pleasure to do sth. it is .for you to do sth和it is .of you to do sth 区别和用法 It is +not+adj+to do sth.的用法 it is time for sth.与it is time (for sb.) to do sth.区别