作业帮He was able to run away before the war broke out.可否将 was able to 改为could为什么?
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/06 02:36:47
He was able to run away before the war broke out.可否将 was able to 改为could为什么?
不可以
could是有能力,指的是一种（过去）一直有的能力
was able to也是有能力,不过就必须有一定前提
句中的“ before the war broke out”决定只能用was able to