a friend of Tom表达对,还是a friend of Tom's对a friend of my father对，还是a friend of my father's对

a friend of Tom表达对,还是a friend of Tom's对a friend of my father对，还是a friend of my father's对 a friend of Tom,还是 a friend of Tom's 或者两个都对? Tom is a best friend of mine. I am a friend of Tom(改错) 既然a friend of mine 是对的 那么为什么我做题时看到一道题上写了个 a friend of Tom这个tom不应该换成Toms吗 A friend of mine,A friend of myself.哪个对? He is a friend of Tom's father是否正确 英语翻译是Tom is a friend of Li Ming.还是Tom is a friend of Li Ming's? “A friend of my sister”表达正确吗?还是应该是“A friend of my sister's”? He is a friend of ___.A.Tom's father B.Tom's father's C.Father's of Tom D.Tom father he said he was going to help----whth---english a.a friend of tom的;her b.a friend of tom;her 是a friend of my mother对,还是a friend of my mother's对? IS THIS () A COMPUTER ENGINEER YES YOU CAN ASK HIM FOR ()A OLD FRIEND OF TOM'S ;ADVICE B OLD FRIEND OF TOM'S ;ADVICESC OLD FRIEND TOM; ADVICE D OLD FRIEND OF TOM;ADVICES 选哪个啊请说明原因那个C选项是old friend of Tom Tom is a good friend of ＿＿.A.me B.my C.mine D.I Friend of a Friend 歌词 a friend of my father? a friend of my father's?两种说法哪个对? we met a good friend of ours at school?对a good friend of ours 提问 a friend of he和a friend of his哪个对?有什么区别?