The book that is on my desk is mine.这句话中第二个定语从句的先行词是什么?为什么第二个从句中不再用关系词?这句话细讲讲吧,

问题描述:

The book that is on my desk is mine.这句话中第二个定语从句的先行词是什么?
为什么第二个从句中不再用关系词?这句话细讲讲吧,

先行词是the book,它同时也是主句中的祝语;
限制性定语从句是that is on my desk,其中that是关系代词,在从句中作主语;
is mine是系表结构作谓语;