一规则动词(Regullar Verbs) 的过去式由动词原形-ed构成具体变化有:1. 一般的直接在词尾加-ed如: want—wanted work—worked need—needed clean—cleaned 2. 以不发音的e结尾的在词尾加-d如:like—liked live—lived use—used move—moved smile--smiled hope--