3、动词的原形、过去式和过去分词列出并规为五种类型。一、AAA型（原形、过去式和过去分词同形）：cost cost cost cut cut cut let let let put put put read read read二、ABB型（过去式与过去分词同形）：bring brought brought build built builtbuy bought bought catch caught caughtdig dug dug feel
4、 felt feltfind found found get got gothave had had hear heard heardhold held held keep kept kept※learn learnt learnt leave left leftlend lent lent make made mademeet met met
5、 pay paid paidsay said said sell sold soldsend sent sent shine shone shonesit sat sat sleep slept slept※smell smelt smelt spend spent spentstand stood stood teach taught taughttell
6、 told told think thought thoughtunderstand understood understood三、ABC型（原形、过去式和过去分词各异）：be was/were been begin began begunblow blew blown break broke brokendo did done draw d
7、rew drawndrink drank drunk drive drove driveneat ate eaten fall fell fallenfly flew flown forget forgot forgotten giv
