They could be saved so much misery为什么不说They could save?

题目

They could be saved so much misery为什么不说They could save?

答案

被动语态.是他们被怎样怎样. 如果你用第二个,就是说他们怎样怎样.
第一个里,THEY是被SAVE.
第二个里,THEY SAVE 别的东西