新概念四有这么一句话

题目

新概念四有这么一句话
Such inns as there were were generally dirty and flea-ridden;the food simply local cheese accompanied by bread often twelve months old,all washed down with coarse wine.
说是由于上下文语义明确并且为使句子简练,在该并列句food后省略了谓语动词was
我想请问一下 什么情况下谓语动词可以省略 有没有具体的语法?
那样省略的话 句子成分不就不完整了么?

答案