him在一个句子中作宾语，是一个动作的接受者。
例句：
I send a book to him.我寄了一本书给他。
His girlfriend broke up with him.他女朋友跟他分手了。
This is so hard to him. 这对他来说太难了。
his有两个意思，一是“他的”的意思，后面一般加名词，表示“他的……”。
例句：
His mama loves him very much.他妈妈非常爱他。
This is his book,I don't know what it's about.这是他的书，我不知道这是关于什么的书。
We can borrow his car to travel.我们可以借他的车去旅行。