by the time后加什么时态
问题描述:
by the time后加什么时态
答
by the time 有两个意思1.到...为止,一般要求主句用过去完成时.He had left by the time we reached home.当我们到家的时候他已经走了.The movie had begun by the time we got there.当我们到那儿的时候,电影已经开...