主格: He is a boy. I am a girl. You are students. We are women. They are doctors. She is a nurse. It is a cat. 宾格: I don't like him. We don't like her. Watch them. Please give us a book. Show me a dictionary. Do you like it?形容词物主代词: His book is over there. My cat is lovely. Your dictionary is on the desk. Our teacher is Miss Li. Their family is very large. Her father is a businessman. Its feet is large.名词所有格: Mine is over there. Hers is red. His is yellow. This is not ours. This is not theirs, it's mine. Its is very handsome. Sorry, this is not yours.
主格、 I am a student.宾格、The teacher asked me a question.形容词物主代词、My new bike is black.名词所有格 My father's norebook compuer is red.