Is that book the one he borrowed on Friday?是定语从句吗?

Is that book the one he borrowed on Friday?是定语从句吗? Is that book ______ he borrowed on Friday? This is the book+that定语从句 the book is helpful that...that从句做book的定语,属于定语从句?helpful是先行词 英语定语从句练习；请问This book is the one that you bought yesterday. He is not the man that he once was是定语从句吗? He is the man.I borrowed money from him .该定语从句 This book is the one that i bought yesterday.此句中的定语从句引导词that 英语定语从句,先行词He is one of the works( ) been saved in that accid 高中定语从句题难题He bought a book that is on sicence and _ has many 定语从句所修饰的范围He is one of the students who help me.He is the on 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?