表语,其实宾从没有先行词,定语才有
其实who,whom,whose很好分的
如果后面是个动词,那肯定是who 比如：the man who is talking to my teacher is my father
如果后面是个冠词/限定词+名词或者代词,那就是whom 比如：The man whom my(限定词） teacher is talking to is my father.
或者The man whom the(冠词） lady is talking to is my father.
如果后面是名词,多半是whose 比如：the man whose hair(这个名词前面没有冠词或其他限定词）is gray is my father.