问题描述: it's nice of you 语法上怎么分析 ,of you 做什么成分呢? 1个回答 分类:英语 2014-12-01 问题解答: 我来补答 做nice的补充成分充当句子的表语,写一个句子 就会懂eg it's nice of you to help him .to help him 主语 it形式主语nice of you 形容词短语做表语 展开全文阅读