It is no harm doing sth与It is not harmful doing sth可以替换吗?为什么

It is no harm doing sth与It is not harmful doing sth可以替换吗?为什么 it is no it is no use doing sth为什么不是it is not use doing sth? 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. 1.It is no use doing sth 2.It is of no use doing sth 可以说It is easy doing sth吗 it is no good doing sth和it is no use doing 要例句 it is difficult doing.sth造句 用it is pleasure doing sth造句 It is worth doing sth同义句 It is not necessary to do sth enjoy doing sth I like to have It is comfortable doing sth.有这个句型吗?