时间状语从句
4.表示“一…就…” (1)once,as soon as = immediately =directly=instantly=the moment =the minute=the instant= 主将从现 (2)hardly / scarcely … when, no sooner … than, The girl had hardly rung the bell when the door was opened suddenly, and her friend rushed out to greet her. 可变为: Hardly had the girl rung the bell before/when the door was opened suddenly, and her friend rushed out to greet her. 5.each time, every time, by the time