hardly…when...
它的意思是“几乎未来得及做完A这件事,紧接着就开始B这件事.”
例如：
He had hardly finished the article when the light went out.
他刚写完文,灯就熄了.
He had hardly had time to settle down when he sold the house.
他还未安顿下来,就卖掉了那所房子.
另外,如果把hardly放于句首,主句要用倒装结构即谓语动词要提前.
如：
Hardly had I finished eating when he came in.
我刚吃完他就进来了.
Hardly had she gone out when a student came to visit her.
她还没走出家门,就有一个学生来看望她.