动词过去式和过去分词规则变化1一般情况加ed,例如want–wanted2以e结尾的动词,直接加d:smile--smiled;hope--hoped
3重度闭音节双写词尾加ed一个元音加一个辅音字母结尾的动词:(1)对单音节单词,双写最后一个辅音字母加ed
例如stopped;planned;(2)对双音节单词,如果重读在第二个音节处,双写词尾辅音字母加ed
如:preferred(重读在fer前);admitted(重读在mit前);referred;deferred;4辅音+y结尾动词,y变i加ed:worried;studied
动词过去式和过去分词不规则变化⒈A---A---A型(现在式、过去式、过去分词同形)三一同形动词原形(现在式)过去式过去分词costcostcost花费cutcutcut割,切hithithit打letletlet让putputput放下readreadread读[]hurthurthurt伤⒉A---A---B型(现在式和过去式同形)现过同形beatbeatbeaten打⒊A---B---A型(现在式和过去分词同形)现分同形comecamecome来becomebecamebecome变runranrun跑⒋A---B---B型过分同形⑴在动词原形后加一个辅音字母d或t构成过去式或过去分词
burnburntburnt燃烧learnlearned/learntlearned/learnt学习meanmeantmeant意思hearheardheard听见⑵把动词原形的最后一个辅音字母“d”改为“t”构成过去式或过去分词
buildbuiltbuilt建筑lendlentlent借给loselostlost失去sendsentsent送spendspentspent花费⑶其他paypaidpaid付laylaidlaid下蛋saysaids