he is a friend of my brother's 在上下文中必须要he这个人存在么?表示哥哥的朋友不止一个,前文必须有he才能用这样的句子吗

Susan is my classmate.He is a friend of（）. he is a friend of mine和he is my friend的区别? 两个句子的区别He is a friend of my brother.He is a friend of my brother's. He is a friend of my brother's.和He is a friend of my brother.两者有什么区别 he is a friend of my mother与he is a friend of my mother’s有什么区别? He is a friend of mine是不是双重属格或是 He is a friend of my He is one of my friends.（改为同义句） He is a friend（ ）（ ） He is a friend of my father正确还是He is a friend of my father's正确?迷惑哦,最好能解释为什么. My friend Jason is full of ___(energy) and he is also a good team player He is a friend of mine.翻译. he is a friend of mine A friend of ( ) [he] is from Japan he is a friend of _____(we) He is a friend of A.my B.me C.mine D.I 英语Hello!My friend.here is a picture of my____ .my name is jane.he is my_______ ,peter He is a friend of my mother 要不要加's? He is a good friend that speaks well of me behind my back. he is one of my friends.（改为同义句） heis a friend _____ ______ .