They ___(run)out of their water and food,which worried them a lot.
问题描述：
They ___(run)out of their water and food,which worried them a lot.
这里为什么用had run 而不用was running?
答
首先理解run out of 的意思：用完了
had run out of 是指已经用完了,符合逻辑
was running out of 正在用完?用完不是一个可以正在进行的动作,进行时态不合适也就是说is running out可是解释为快用完，但是加了个of就是已经用完了吗？如果正在的话sth is running out 主语得是物品，这样说也可以嗯 懂了 谢谢