人称代词有主宾格，主格I you he she it we you they做主语，宾格me you him her it us you them做宾语。

物主代词分形容词性物主代词和名词性物主代词

形容词性物主代词my your his her its our your their做定语，修饰限定物之主人

名词性物主代词mine yours his hers its ours yours theirs等同于形容词性物主代词+名词，做标语，宾语等。