牛津英语过去式与过去分词

keep-kept-kept, sleep-slept-slept, sweep-swept-sweptР     4. 过去式和过去分词都以augh或ough结尾的动词。如:Р     buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caughtР     5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid。如:Р     say-said-said, lay-laid-laid, pay-paid-paidР     6. 另有一些其它形式的变化。如:Р    have-had-had, learn-learnt-learnt, leave-left-left, lose-lost-lost, make-made-made, meet-met-met, feel-felt-feltР     四、有些动词原形中含有字母i,在过去式中变i为a,在过去分词中变i为u。如:    Р     五、以字母ow或aw结尾的动词,在变成过去式时,通常把元音字母变成e,在变成过去分词时,通常只在词尾加n。如:Р   blow- blew- blown, draw-drew-drawn, grow-grew-grown, throw-threw-thrown, know-knew-knownР     六、有些动词的过去分词是在原形词尾加n或en,变成以en结尾的单词。如:Р   rise-rose-risen, give-gave-given, take-took-taken, fall-fell-fallen, drive-drove-driven, eat-ate-eaten