麻烦大家帮忙解释一下,It is no use .... 和 It is of no use ...之间的区别？

Question

例如:Her brother doesn't want to go to HongKong with you.It is no use trying to persuade him.
He has already made up his mind to go to that university .It is of no use to change his idea.
为什么一个用doing 一个用to do ?

Answer 1

It is no use +doing sth是现在分词里的固定搭配。类似的搭配还有It is a waste of time doing sth.
和 It is of no use ...是be of +名词=be +形容词，如：be of importance=be important, It is of no use = It is not useful ...,而 It is not useful或uesless+to do sth. ...这里只是多加了个no，看起来这两个有点相似。实际上就是It is of use = It is useful。
so,understand?追问

understand!

追答

那该采纳我的啊。

Answer 2

It is no use doing sth 是一个常用句型，意思为：做...是没用的，相似的还有It is no good doing sth. 第二个句型中的of no use 属于of +抽象名词结构，相当于not useful. 相似的还有
of help=helpful of importance =important of value =valuable

Answer 3

It's no use doing sth是固定句式
It's of no use to do sth也可以说成It's useless to do sth.这里的it是形式主语，真正的主语是动词不定式to do，of +名词相当于形容词

Answer 4

都是固定搭配
it is no use doing
it is of +表示形状的名词+to do