He went left as soon as you came.你一来他就走了。名词引起的一...就：the moment (instant.minute.second) 表示一...就..。The moment (instant.minute.second) that he finished the task successfully.he felt very thankful for his teacher.他一成功地完成了任务，就对他的老师充满了感激。介词引起的一...就：on+doing 表示一...就..。on hearing the bad news.she cried out.一听到那个坏消息，她就失声痛哭起来。