his 既是形容词性物主代词又是名词性物主代词eg: This is his father him 是人称代词的宾格,用在动词和介词之后eg: My teacher will help him .
通常动词后面用宾格him I will take care of him when you are not at home. 表示“他的”什么的时候用hisHis book is on the desk.His mother is watering flowers.