物主代词

物主代词包括形容词性物主代词和名词性物主代词。形容词性物主代词只能作定语，包括：my, your, his, her, its, our, their.名词性物主代词相当于形容词性物主代词加名词，可以做主语、表语和宾语，包括：mine, yours, his, hers, its, ours, theirs.examlink.com收集整理

【例句】

Our problems are different from those of other big cities.A friend of mine called on me yesterday and we had a long chat about our school days.