lives were being saved in emergrncies.为什么用were being saved 而不是were saved

问题描述:

lives were being saved in emergrncies.为什么用were being saved 而不是were saved

这是被动语态的过去进行时态.
were saved 是被动语态的过去式,无疑问
要表达进行时,就在be 后面加 being
例如
The cat is being taken care of 那只猫正在被照顾