一、物主代词的用法
物主代词分形容词性物主代词(my, your, his, her, its, our, your, their)和名词性物主代词(mine, yours, his, hers, its, ours, yours, theirs)。形容词性物主代词在句只用作定语；名词性物主代词则不能用作定语，但可以用作主语、宾语、表语、连用of作定语。如：
His son is taller than hers. 他的儿子比她的儿子高。
Her son is a friend of ours. 她的儿子是我们的朋友。
Ours is a great country. 我们的国家是一个伟大的国家
This is my desk and that's hers. 这是我的书桌，那是她的书桌。
She clasped Helen's hand in both hers. 她用双手握住海伦自手。
My view is the very opposite of his. 我的看法和他的看法恰恰相反。
He lives in the house which is opposite ours. 他住在我们家对面的房子里。
Our school beat theirs at baseball. 棒球赛我们学校打赢了他们的学校。
This is your pen. Mine is in the box. 这是你的铅笔，我的在铅笔盒里。
【说明】可以说 a friend of mine (ours, yours, hers, his, theirs)，但是不能说 a friend of me (us, you, her, him, theirs)，但是“名词+of it”有时可用来代替“its+名词”，如 its price 也可说成 the price of it。
二、物主代词与own 连用
为了强调，有时可在物主代词后加上own一词。如：
Mind your own business. 别管闲事。
I saw it with my own eyes. 那是我亲眼看到的。
She had made her own tragedy. 她造成了自己的悲剧。
Her private morality is her own business. 她的个人品德是她自己的事。
I'm a human being. I can stand on my own feet. 我是人，我可以自立。
He referred his wealth to his own hard work. 他把他的致富归功于他辛勤的工作。
I feel that I knew about the value of my own work. 我感觉我了解我自己工作的价值。
【说明】有可用 of one's own 置于名词后作定语。如：
We have no children of our own. 我们没有自己的孩子。
I wish I had a little lab of my own. 但愿我有自己的一间小实验室。
We would be glad to have money of our own. 我们愿意有自己的钱。
These professors had opinions of their own. 这些教授们有合己的看法。
I hope to have a room of my own. / I hope to have my own house. 我希望有自己的房子。