a friend of后加什么?为什么老师说例句：she is a friend of him.老师说of是介词，后加宾格。我不懂，为什么？

a friend of 后加什么格 a friend of后加什么?为什么老师说例句：she is a friend of him.老师说of是介词，后加宾格。我不懂，为什么？ a friend of 后加什么样的名词形式of 已经有“的”的意思了,为什么有 mine的形式呢?a friend of me 和 a friend of mine有什么区别? be a friend of 后面加什么 be a friend of 后面加什么 新概念语法第二册问题Jeremy used to have a large circle of friend,but now she likes being alone.circle of friend改写成friend circle行不行?为什么要加being?起什么作用? The boy with glasses is my friend 为什么用with而不用wear?用了with 后为什么glasses不能加a pair of? Tony is a friend of my brother's.为什么有了of已经表示的了还要加'?能不能说Tony is a friend of my brother. Life Without A Friend Is Death is后为什么加daethRT a photo of (I) ,a friend of (I)填什么 为什么 a kind of kinds of后加什么名词 a friend of sb's a friend of sb's 为什么sb后面要用所有格形式（加s）,可以详细讲下么 the boy's name=the name of the boy this is my friend =this is a friend of mine 看看“of”后!为什么 who were your first friends?friend 后为什么加s Friend of a Friend 歌词 a friend of 是加 ours 还是 us A friend of her/his,那就是说a friend of my?那和a friend of mine有什么区别? quite a few of后加什么词?