关于定语从句中介词的问题,谢谢!

问题描述:

关于定语从句中介词的问题,谢谢!
The hotel at which they are staying is very expensive这句话可以这样说吗:The hotel which they are staying at is very expensive

如果是固定短语,介词不可以放在关系代词之前.如:laugh atHe is a person who is always laughed at.如果是非固定短语,介词可以放在关系代词之前/后.如:This is the house which I once lived in.This is the house ...