为什么要用a friend of mine而a leg of desk,不用a friend of me

为什么要用a friend of mine而a leg of desk,不用a friend of me a good friend of mine 为什么用mine his a friend of mine 为什么用mine 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 With whom did you watch 2010 World Cup Opening Ceremony ( )A.A friend of mine B.A friend of meC.A friend of my sister D.A friend of you为什么要解释 Friend of a Friend 歌词 an old friend of me有这种说法吗?an old friend of mine跟an old friend of me有什么区别?那为什么要用mine? 是help of him与a friend of his 为什么一个用him 一个用his? of的用法.为什么a friend of mine要用物主代词,而a painting of Tom却不用名词所有格 a friend of mine(I) is a good reporter中为什么用mine a friend of mine. a friend of a friend of I还是a friend of me那为什么有the love of a mother a friend of ours写成our a friend可以吗`ours换成us可以吗/为什么? The girl named ellie is a friend of tom 这里为什么用named a friend of mine comes from... 为什么用mine 不用me 改错Peter is a friend of my father.为什么? a friend of mine 那为什么 the leg of the chair用chair而不用chair's