why didn't you help the litter boy?oh,sorry.he had struggleed to his feet_____i ran over.a.be...
问题描述：
why didn't you help the litter boy?oh,sorry.he had struggleed to his feet_____i ran over.a.be...
why didn't you help the litter boy?oh,sorry.he had struggleed to his feet_____i ran over.a.before b.after c.until d.since选什么?为什么?谢
答
A 我还没来得及跑过去他就挣扎着站起来了
构成过去完成时 .在我到之前他的动作已经发生了