语法the original paintings the prints were made from were often of good quality

问题描述:

语法the original paintings the prints were made from were often of good quality
这句话的语法问题,我总觉得这么不是很顺.它是怎么构成的.为什么from后面直接加were...

主句是the original paintings were often of good quality.
the prints were made from 是定语从句,修饰paintings的.