2. 物主代词
1)表示所有关系的代词叫物主代词。物主代词分形容词性物主代词和名词性
物主代词，如下表所示。
2)形容词性物主代词的作用相当于形容词，可在句中作定语。例如：
Our teacher is coming to see us.
This is
her pencil-box.
3)名词性物主代词的作用相当于名词，在句中可用作主语、宾语和表语。
Our school is here, and
theirs is there.（作主语）
--- Is this English-book
yours? （作表语）
--- No. Mine is in my bag.
I've already finished my homework. Have you finished
yours? （作宾语）
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