A friend of her/his,那就是说a friend of my?那和a friend of mine有什么

a friend of mine= my friend a friend of mine. a friend of mine a friend of my还是a friend of mine a friend of mine=?my friends 关于a friend of mine a friend of mine=my friend吗 a close friend of mine 和my close friend 有区别吗 a friend of he和a friend of his哪个对?有什么区别? a friend of my brother和a friend of my brother's 有什么区别? a friend of myself与a friend of mine有什么区别,急 his a friend of mine 为什么用mine