1.英语主要有下面这些物主代词
形容词性物主代词: my, your, his, her, its, our, their
名词型性物主代词: mine, yours, his, hers, its, ours, theirs
2.形容词性的物主代词只能用作定语，如：
This is my (our) room and that one is his (their) room.
这是我(们)的房间，那是他(们的房间)。
What's her (your，its) name?
她(你，它)叫什么名字?
在汉语中“我的”、“你的”等词有时可以省掉，在英语中却常需加物主代词：
Don't put your hands in your pockets.
不要把手揣在口袋里。
Close your books.
把书合上。
He opened his eyes and looked around.
他睁开眼睛往周围望了望。
3.名词型的物主代词相当于“物主代词+名词”，在句子中可用于：
1)表语：
This pen is mine，not his.
这是我的笔，不是他的笔。
This umbrella is yours and that is hers.
这把伞是你的，那把伞是她的。
2)主语：
Ours is a happy family.
我们家是一个幸福的家。
Their (our) apartment is bigger than ours (theirs).
他(我)们的住房比我(他)们的大。
3)宾语：
Let's clean his (their) room first，and mine (ours) later.
咱们先打扫他(们)的房间，再打扫我(们)的房间。
I like your plan better than his (theirs).
我更喜炊你的计划，胜过他(们)的计划。
此外还可与of连用作定语：
He is a close friend of mine (ours).
他是我(们)的一位亲密朋友。
That daughter of his (hers) is very cute.
他(她)的那个女儿非常可爱。
yours还常用在书信末尾：
Yours sincerely(或Sincerely yours)
你诚挚的朋友
