定语从句的关系代词 that不是万能的.具体的的用法:若先行词指人或物则代替先行词在定语从句中充当主语或宾语 The animal that \which is lost is a panda.先行词 指物代替先行词在定语从句中充当主语 She is the person that \who we are worried about.先行词 指人代替先行词在定语从句中充当宾语 注意1 that \which在代物时常常可以通用,但有时只宜于用which ,不用that (1) 关系代词前有介词时.This is the hotel in which you will stay.(2) 如有两个定语从句,其中一句的关系代词是that,另一句宜于用which.Let me show you the novel that I borrowed from the liberary which was newly open (新开放) to us.注意2that \which在代物时常常可以通用,但有时只宜于用that ,不用which.(1) 先行词是形容词最高级或者它的前面有形容词最高级时 This is the best that has been use