英语语法高手快来!It's no use doing sth.这个句子中doing sth.在句子中充当什么成分?是su

英语语法高手快来!It's no use doing sth.这个句子中doing sth.在句子中充当什么成分?是su it's no good/use doing sth 并举例 i like doing sth.中doing做的什么成分? divide sth into...介词into在这里句子中充当什么成分呢?是宾补吗? 1.It is no use doing sth 2.It is of no use doing sth it’s no use / good doing sth.为固定句型 doing 英语语法问题：Sb.be doing sth./Sb.doing sth./Sb do sth.这几个句子有什么区别吗? there are sb doing sth中doing sth作什么成分 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‘s a good time for sb to do sth中,to do sth在句中充当什么成分?for sb it is no it is no use doing sth为什么不是it is not use doing sth?