I met a friend of mine ,told me that he was going to Japan the next month

问题描述:

I met a friend of mine ,told me that he was going to Japan the next month
I met a friend of mine ,_____told me that he was going to Japan the next month
.为什么这要用who..
而不可以用whom.这两个有什么分别嘛?

who 做主语或宾语,而whom做宾语