主格/宾格/所有格/名词形式的所有格 I/me/my/mine you/you/your/yours she/her/her/hers he/him/his/his they/them/their/theirs it/it/its/its 主格用作主语,如: I am a girl. 宾格用作宾语,在动词或者介词后: 动词后:This is me. 介词后:Go without me. 所有格相当于形容词,后面接名词,如:This is my book. 名词形式的所有格=所有格+名词. 比如:my book = mine (当然,前面要有提及,要不然你说Mine别人不知道你说的具体是什么东西) 如: A: Is this your book? B: Yes, It is mine!(相当于It is my book!)