it's nice of you 语法上怎么分析 ,of you 做什么成分呢?

it's nice of you 语法上怎么分析 ,of you 做什么成分呢? It's nice of you to come here,帮忙分析一下这句话的语法结构 It's nice of you to bring me the newspaper .of you是什么成分呀?of It's nice of you to bring me the newspaper .of you是什么成分呀? —It’s really nice of you. It,s very nice of you,中文, 英语语法 It's really nice of you it's very nice of you It's nice of you to help It's nice of you to say It's nice of you helping me so much helping 的成分是什么? That's nice of you