his既是形容词性物主代词又是名词性物主代词,his后面跟名词的时候,应该是形容词性物主代词,如果是名词性物主代词,它后面不能跟名词。例如This is his

book.=This book is his.his的人称代词是he 和him,he是主格作主语,him是宾格作宾语,He is a good boy.

We all like him.