As she was very weak,she couldn't move

问题描述:

As she was very weak,she couldn't move
这里的couldn't与can‘t区别,couldn't表示过去时?

can't 指现在“不能”.couldn't 指过去“不能”
从前文was,可见指的是过去,故用couldn't
翻译:由于她身体虚弱,她没法再走了.