|
1.A-A-A型（无变化的动词） cut-cut-cut let-let-let hit-hit-hit put-put-put cost-cost-cost hurt-hurt-hurt read/rid/-read[red]-read[red] 2.A-A-B型（现在式和过去式同形） beat-beat-beaten 3.A-B-A型（现在式和过去分词同形） come-came-come become-became-become run-ran-run 4.A-B-B型（动词的过去式与过去分词相同） （1）词尾的d变为t或词尾是n加t build-built-built lend-lent-lent send-sent-sent spend-spent-spent burn-burnt/burned-burnt/burned learn-learnt/learned-learnt/learned mean-meant-meant （2）把原形变为aught及ought的变化（如果原形有a则是aught，无a则是ought） buy-bought-bought bring-brought-brought think-thought-thought fight-fought-fought catch-caught-caught teach-taught-taught （3）eep变ept或过去式、过去分词含有/e/音的动词 keep-kept-kept sleep-slept-slept sweep-swept-swept leave-left-left say-said-said meet-met-met spell-spelt-spelt smell-smelt/smelled-smelt/smelled hold-held-held feel-felt-felt （4）其他 | 
