yours/your
（1）Is this yours, Li Lei?
(2) I think it's hers.
yours 与 your, hers 与 her 到底有什么区别?
应当牢记,英语的物主代词分两种:形容词性物主代词(或称限定性物主代词)和名词性物主代词(或称独立性物主代词):
A. 形容词性物主代词: my our your his her its their
B. 名词性物主代词: mine ours yours his hers its theirs
还应牢记，形容词性物主代词不能独立使用，必须用在名词之前，而名词性物主代词只能独立使用，绝不可用在名词之前。
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That is my bike. 那是我的自行车。
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That bike is mine. 那辆自行车是我的。
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Are those books mine or yours? 那些书是你的还是我的？
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It's not your book — it's hers. 那不是你的书——那是她的。
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If you need a bicycle, I'll lend you mine. 如果你需要自行车，我愿意把我的借给你。
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She would shut herself up in her room, Julio in his. 她常把自己关在房间里，而朱利奥也是一样。
mine, ours, his, hers, theirs 可用作介词 of 的宾语, 而此种 of 短语充当定语的情形是很常见的:
possessive pronouns
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Isn't Frank Byers a friend of yours? 弗兰克·拜尔斯不是你的朋友吗？
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Have you read any books of mine? 你读过我的书吗？
请做下面的英语试题：
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Is her hair shorter than ____? A. me B. my C. mine D. I(全国高考)
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——Is this raincoat yours? ——No, mine ____ there behind the door. A. is hanging B. has hung C. hangs D. hung(同上,97-16)
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——Is your camera like Bill's and Ann's? ——No, but it's almost the same as ____. A. her B. yours C. them D. their(同上,94-11)
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This bike is his, not _. A. their B. hers C. her D. your