It is such an interesting book that we all like it.为什么不是定语从句

问题描述:

It is such an interesting book that we all like it.为什么不是定语从句

请比较用了什么词,少了什么词:It is such an interesting book THAT we all like it.(结果状语从句)It is such an interesting book AS we all like (定语从句)又如 They are such good books THAT we will read ...