名词性物主代词和形容词性物主代词的区别如下: 形容词性物主代词相当于形容词,后接名词,作名词的定语;名词性物主代词相当于名词,不能接名词了,和名词一样,可以充当主语、宾语。名词性物主代词=形容词性物主代词+名词。 如:this is his book.这是他的书.(his是形容词性物主代词,修饰book)=this book is his.(his是名词性物主代词,作表语);my book is here.His is over there.(His在这里也是名词性物主代词,作主语,=his book)。