It's mine 后面为什么用mine为什么用mine,不用My

It's mine 后面为什么用mine为什么用mine,不用My 请问IT‘S MINE is this coat yours?No,it's not mine.此句中为什么要用yours和mine? it's mine 什么意思? Is this your sweater,Joy?No,it's not ___ sweater.___ is yellow.用my或 mine填写这两个空.Is this your sweater,Joy?No,it's not ___ sweater.___ is yellow.用my,mine填写这两个空,前面一个用my,我知道,但后面一个为什么用mine.min it's mine.这里的mine可不可以换成me No it is Helen. l left mine at home.为什么用mine而不用my呢 Mary’s ruler is much longer than [mine]. 括号中为什么用mine. 请解析. mine It's light.Mine is pink. it's so different from mine 翻译 Let me( ) .oh,it's mine. Yes,it's mine.It belongs to me belongs为什么要加s I met a friend of mine.of不是表示所属关系吗,为什么后面还用mine呢 an old friend of mine这就话为什么用mine a good friend of mine 为什么用mine his a friend of mine 为什么用mine 英语翻译but it isn t hers.lt s mine!it isn t hi s mine!