whom先行词指人，在定语从句中充当宾语。whose先行词指人或物，在定语从句中充当定语。
whose是所有格，意思是“谁的”，先行词指人或物，在定语从句中充当定语。后面一般跟名词；whose是指代主句中的物主代词，像是her，his，their。
whom是who的宾格，意思是“谁”，先行词指人，在定语从句中充当宾语；whom只能指代主句中
的人称性质的宾语。
例句：
She introduced me to her husband，whom I hadn’t met before.她把我介绍给她丈夫，我以前没见过他。
He asked me with whom I had discussed it.他问我和谁讨论过此事。
Whom do the police suspect？警方怀疑谁？
Whose is that farm over yonder？那边的农场是谁的？
I can't remember whose idea it was for us to meet again. 我记不清我们再次会面是谁的主意了。
关系代词whom、whose的用法：
whom在定语从句中用作宾语。
如：
In Berlin，he first met the woman whom he would one day marry.在柏林，他第一次遇见那个女人，后来他终于跟她结了婚。
但是，用作宾语的whom如果不是紧跟在介词之后，通常会被省略或用who，that代之。
如：
The person to whom I complained is the manager.我向他投诉的那个人是经理。
The person (who，whom，that) I complained to is the manager.我向他投诉的那个人是经理。
关系代词whose既可用于指人，也可用于指事或物，它在定语从句中主要用作定语。
如：
She is the woman whose car was stolen.她就是汽车被盗的那个女人。
This is the house whose windows were broken.这就是窗户被打破了的房子。
Mrs.Gray，whose children are in college，is trying to get a job.格雷太太的孩子们都在上大学，她想找一份工作。
His house，whose windows were all broken，was a depressing sight.他的房子窗户无一完好，一派令人心酸的景象。