All the doctors in the hospital insisted that he ( ) badly wounded and that

问题描述:

All the doctors in the hospital insisted that he ( ) badly wounded and that
答案是was,be operated on.请教,这里为什么用be?

insist 用法与suggest 相似.insist作“坚持”说时,要用陈述语气;作“坚决主张;坚决要求”讲时,用虚拟语气.
所以首句用了陈述句语气,使用一般过去时;
次句用了虚拟语气,用(should) be operated on,should 可以省略为什么用be,而不用is看上面我说的,是虚拟语气,should be 的形式,情态动词should 后面要用动词原形。should 被省略了。