一般情况与过去式一样,直接加 ed 或 d (以 y 结尾把 y 改为 I,再加 ed)2
AAA 型(动词原形,过去式,过去分词同形) cost-cost-cost cut-cut-cut hit-hit-hit hurt-hurt-hurt let-let-let put-put-put read-read-read AAB 型(动词原形与过去式同形) beat-beat-beatenABA 型(动词原形与过去分词同形) become-became-become come-came-come run-ran-runABB 型(过去式与过去分词同形) dig-dug-dug get-got-got sit-sat-sat win-won-won meet-met-met keep-kept-kept sleep-slept-slept sweep-swept-swept feel-felt-felt smell-smelt-smelt leave-left-left build-built-built lend-lent-lent send-sent-sent spend-spent-spent lose-lost-lost burn-burnt-burnt learn-learnt-learnt mean-meant-meant catch-caught-caught teach-taught-taught bring-brought-brought fight-fought-fought buy-bought-bought think-thought-thought hear-heard-heard sell-sold-sold tell-told-told say-said-said find-found-found have/has-had-had mak