人称代词的主格在句中可以做主语例子：they are playing football.
人称代词的宾格在句子中作动词或介词的宾语。例子：his parents are looking for him.
人称代词在句子中作表语例子：it’s me.
说活人出于感情用he或she来代替国家，船只，动物等名词。例子：She is a fine old ship.
英语口语中习惯上使用人称代词的宾格作表语例子：it’s me。
We,you, they有时用来代替一般的人
例子：we should keep quite inthe library.