it is no use of doing things后面的doing things是什么成分?

it is no use doing的问题 1.It is no use doing sth 2.It is of no use doing sth there are a lot of things you know should be doing 这句话的成分是什么 关于 it is no use doing 请教it is no use doing 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. There is no use to do与 It is no use doing的区别 非谓语动词的时候,It's of no use后面加的是todo 还是doing it is no good doing sth和it is no use doing 要例句 类似于it is no use doing,是不是只要it is 后面加的是n.而不是adj.后面就是加动名词的? it is no it is no use doing sth为什么不是it is not use doing sth?