My是形容词性物主代词,是形容词的词性,后面需要加名词,比如说：my bag,my teacher.
me是人称代词的宾格“我”,跟语文中一样,宾格可以作宾语,需要放在动词或者介词后面,eg:He likes me.
He did this for me!
能看懂吗?