(1)一般情况下,动词词尾加 ed ,如:worked played wanted acted
(2)以不发音的 e 结尾动词,动词词尾加 d,如:lived moved decided declined hoped judged raised wiped
(4)以一个辅音字母结尾的重读闭音节动词,双写词尾辅音字母,再加 ed,如:stopped begged fretted dragged dropped planned dotted dripped
(5)注:不规则动词的过去式变化规律性不强,须多加记忆.