it's nice of you to help me同义句改成 U're nice 开头的!介词突然忘了

It's nice of you to say It's nice of you to help It's really nice of you.Nice to meet you.区别 It,s very nice of you,中文, It's very nice of you It's nice of you to bring me the newspaper .of you是什么成分呀? it's nice of sb to do It's very nice of you to write to me,为什么用of it's so nice--you---help me.Aof ;for Bfor; to Cof ; to D of ;of It's nice to meet you again It's nice to meet you finally It's nice ---(talk) to you It’s nice to meet you中的nice是什么意思 It's nice of you to do that 为什么用of 而不用for It's really nice of you to say so.中文意思?为什么用of不用for? it's nice of you to give me a ticket to the film翻译 连词成句,to,me,talk,of,it's,really,you,nice,to it's nice of you to help me同义句改成 U're nice 开头的!介词突然忘了