请看下面这个定语从句: The man who is talking with my friend is my teacher.该剧中主语是the man , 表语是my teacher所以主句是the man is my teacher.这个男人是我的老师。定语从句式是who is talking with my friend和我朋友说话的这个人，该从句修饰先行词the man,在这儿关系代词who和先行词the man意思一样的。所以把从句和定语从句连在一起就是:和我朋友讲话的那个男人是我的老师
