1、名词性物主代词可作主语、表语、宾语，不能作定语
This is my cup. Yours is the one thats green.
These things are mine. Those are theirs.
2、名词性物主代词与 of 结构连用
That brother of yours looks healthy.
He is an old friend of mine.
3、下列结构用 the 代替物主代词
He pulled Jack by the hair (arm).
He was wounded in the leg.
He was blind in the right eye.
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