物主代詞包括形容詞性物主代詞和名詞性物主代詞。形容詞性物主代詞只能作定語，包括：my, your, his, her, its, our, their.名詞性物主代詞相當(dāng)于形容詞性物主代詞加名詞，可以做主語、表語和賓語，包括：mine, yours, his, hers, its, ours, theirs.
【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.
【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.