Now she was left along with her son为什么用was和left

问题描述:

Now she was left along with her son为什么用was和left
如题,我英语基础烂,麻烦解释清楚点
be为什么用过去式?

翻译:现在就剩下她和她的儿子了.
语法:be left ------被动语态,----被留下,
along with ==and -----和,与.