hardly/scarcely…when/before,nosooner…than 和assoonas都可以表示"一…就…"的意思，例： Ihadhardly/scarcelygothomewhenitbegantorain.
Ihadnosoonergothomethanitbegantorain.
AssoonasIgothome,itbegantorain. 注意：如果hardly,scarcely或nosooner置于句首，句子必须用倒装结构：
Hardly/ScarcelyhadIgothomewhenitbegantorain.
NosoonerhadIgothomethanitbegantorain.
