1）who,whom
这两个词代替的先行词是人的名词或代词,在从句中所起作用如下：
Is he the man who wants to see you?
他就是你想见的人吗?（who在从句中作主语）
He is the man whom that I saw yesterday.
他就是我昨天见的那个人.（whom在从句中作宾语）
2) Whose 用来指人或物,(只用作定语,若指物,它还可以同of which互换）,例如：
They rushed over to help the man whose car had broken down.那人车坏了,大家都跑过去帮忙.
Please pass me the book whose (of which) cover is green.