人称代词主格：作主语，表示谁怎么样了、干什么了。I am a teacher. You are student. He is a student, too.We/You/They are students.人称代词宾格作宾语，表示动作行为的对象。Give it to me. Lets go (lets =let us)二、物主代词表示所有关系的代词叫做物主代词，也可叫做代词所有格。物主代词分形容词性物主代词和名词性物主代词二种，其人称和数的变化形容词性物主代词(my/your/his/her/its/our/their)+名词而名词性物主代词则相单于性物主代词+名词,故其后不必加名词。如：Is this your book?No,， it isnt， its hers(her book)This pen is mine.
