人称代词 我 I am,have,动词不能有（s） i eat,i run,i sleep
他、她、它,he/she/it is,has,动词加s he eats,she runs,it slepps.
他们、我们 多1个人的话,跟 I 差不多一样的用法
物主代词分两种,一种叫形容词性的物主代词,这类词只能做定语.表示所属,“你的/我的/他的/我们的/他们的/你们的”
your book/his pen/my pencil
另一种叫名词性的物主代词 这类词可以做主语/宾语/表语,等于形容词性的物主代词+ 名词
this is not my book,mine (my book)is over ther.
this is his book.It isn't hers(her book).
I have some books,so I don't like his(his books).