at once 马上;She fell in with my idea at once. right away 马上;He wants to see you right away . as soon as立刻; As soon as he gets here were re...
fast 既是形容词又是副词 没有fastly这词; fast adj.快的;迅速的;敏捷的;迅速发生的;立即发生的;动作迅速的; adv.快;快速;迅速;不久;立即;牢固地;完全地; v...
happen是非延续性动词。 happenv.(尤指偶然)发生,出现;(作为结果)出现,发生;碰巧;恰好 Who can say what will happen next year? 谁能说得出明年会发生...