名词性物主代词his与形容性物主代词his

所谓的名词性的物主代词，顾名思义这类的物主代词具有名词性特征，在句子中充当主语，表语或者宾语。
如：His is a new bike.
This book is his.
She doesn't like my kite;she likes his.
形容词的物主代词起到形容词的作用，在句子中只能作定语。
如：His picture is very beautiful.
I don't know his name.