It is no harm doing sth与It is not harmful doing sth可以替换吗?为什么btw:此处的harm是什么词性?名词?no可不可以改成not a harm(既然harm是名词）

It is no harm doing sth与It is not harmful doing sth可以替换吗?为什么btw:此处的harm是什么词性?名词?no可不可以改成not a harm(既然harm是名词） is it doing harm to do.是反问句吗?常见反问句还有哪些? it is no pleasure doing造句 it is no good doing sth和it is no use doing 要例句 用It is no use doing It is no need doing...造句和There is no need...造句 it is no it is no use doing sth为什么不是it is not use doing sth? There is no harm in trying.There is no harm in trying.in trying是什么语法? it is no good doing 与it is no use Thany very much. It is no use doing sth与It is no use to do sth的区别. it is no use to do 与it is no use doing 有什么区别? it is no useless to do=it is no use doing it is no pleasure doing 这个用法对么~好像是there is no pleasure doing、但是it is no pleasure doing是书上的. 用it is no pleasure doing sth 造句? there is no other way of doing it翻译 it is of no use doing 还是to do?it is no use doing 还是to do? 1.It is no use doing sth 2.It is of no use doing sth哪个是对的? it is no use doing的问题有it is no use doing sth,那有没有it is use doing sth呢? There is no use to do与 It is no use doing的区别There is no use to doIt is no use doing 是这么用吗?