this is the boy.i sit behind him怎么合并成定语从句?
问题描述：
this is the boy.i sit behind him怎么合并成定语从句?
答
This is the boy who I sit behind
答
This is the boy whom I sit behind.
答
This is the boy behind whom I sit.
或:
This is the boy whom I sit behind.
答
This is the boy who sits in front of me.