过去式,过去分词的变化规则
    1.一般情况下,动词的过去式和过去分词是在词尾加上-ed:
study的过去分词    walk → walked → walked
    learn → learned → learned
    2. 如果动词的词尾是不发音的-e,则只需加-d:
    live → lived → lived
    smile → smiled → smiled
    3. 如果动词的词尾是辅音字母+y,则去掉-y,加-ied:
    carry → carried → carried
国庆板报内容    study → studied → studied
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    4. 如果动词的词尾是重读闭音节,且末尾只有一个辅音字母,则双写该辅音字母,再加-ed:
如风往事    stop → stopped → stopped
    plan → planned → planned
青蛙怎么做好吃    5. 有些动词的过去式和过去分词是不规则的,需要单独记忆,例如:
    go → went → gone
    see → saw → seen
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    eat → ate → eaten
    以上是英语中过去式和过去分词的变化规则,掌握了这些规则,可以更加熟练地运用英语动词时态。