一 ...就 ...如：I found myself in an entirely new world the moment I arrived in Beijing.我一到北京就感到耳目一新.它的用法就和when 差不多？不是完全正确，考查“一……就……”表达法表示“一……就……”的连词有：①as soon as; ②the moment=the minute = the instant; ③immediately=directly;④hardly…when…=nosooner…than…等。例如：1. As soon as/ The moment /The minute/ Immediately he saw the bear, he climbed thetree. 他一看见熊就立刻爬上了树。2. I had hardly sat down when he stepped in.= I had no sooner sat down than he stepped in. =Hardly had I sat down when he stepped in.= No sooner had I sat down than he stepped in. 我刚坐下，他就进来了。