有谁知道whom是什么意思

whom:[ hu:m,hum ]
pron.[who的宾格]谁
例句与用法:
1.That is the man about whom we were speaking.
他就是我们刚才谈论的那个人.
2.Our doctor,whom/who we all like very much,is leaving.
常给我们看病的那个医生,我们都非常喜欢他,他要走了.
3.The students(whom/who/that) we examined last week were excellent.
我们上星期考的学生都好极了.
4.Who did you see at the party?
你在聚会中看见谁了?
5.Whom did they invite?
他们邀请谁了?
6.Who did you go with?
您是跟谁一起去的?
7.By whom was the order executed?
这项命令是谁执行的?
8.To whom should I refer the matter?
我应该找谁办这件事?