新概念第三册41
问题描述：
新概念第三册41
They could be saved so such misery and expanse if they chose to live in the city where they rightly belong.为什么要用be saved被动语态?为什么要用过去时?我觉得他是说了一种现象
答
本句用了与现在事实不符的虚拟语气结构.
主动语态为：To live in the city could save them so much misery and expense.