定语从句中which和that何时不能换用答:修饰物体时关系代词that和 which的区分 使用that的情况:1.当先行词是nothing,something,anything,all,each等不定代词时.e.g.Do you have anything that is important to tell me?2.当先行词被all,any,some,no,not,every,each等修饰时.e.g.I have some books that are very good.3.当先行词...