不规则动词过去式和过去分词分为多种类型，AAA型（现在式、过去式、过去分词同形）例如：cost cost cost 花费；AAB型（现在式和过去式同形）例如：beat beat beaten 打，ABA型（现在式和过去分词同形）例如：come came come 来，等等。
类型划分
⒈A---A---A型（现在式、过去式、过去分词同形）
动词原形（现在式）过去式，过去分词
cost cost cost 花费
put put put 放下
read read read 读(读音是ABB型)
hurt hurt hurt 伤
⒉A---A---B型（现在式和过去式同形）
beat beat beaten打
⒊A---B---A型（现在式和过去分词同形）
come came come来
become became become变
⒋A---B---B型
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。
burn burnt burnt燃烧
learn learned/learnt learned/learnt学习
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。
build built built建筑
lend lent lent借给
⑶其他
pay paid paid付
lay laid laid下蛋
不规则动词表
序号动词原形或不定式过去式现在分词或动名词第三人称单数1bearborebearingbears2forbearforboreforbearingforbears3overbearoverboreoverbearingoverbears4bendbentbendingbends5unbendunbentunbendingunbends6bidbade，bidbiddingbids7forbidforbade，forbadforbiddingforbids8outbidoutbidoutbiddingoutbids9underbidunderbidunderbiddingunderbids10bindboundbindingbinds11rebindreboundrebindingrebinds12unbindunboundunbindingunbinds13buildbuiltbuildingbuilds14rebuildrebuiltrebuildingrebuilds15castcastcastingcasts16broadcastbroadcast，broadcastedbroadcastingbroadcasts17forecastforecast，forecastedforecastingforecasts18miscastmiscastmiscastingmiscasts19overcastovercastovercastingovercasts20recastrecastrecastingrecasts21comecamecomingcomes22becomebecamebecomingbecomes23overcomeovercameovercomingovercomes24dealdealtdealingdeals25misdealmisdealtmisdealingmisdeals26dodiddoingdoes27outdooutdidoutdoingoutdoes28overdooverdidoverdoingoverdoes29redoredidredoingredoes30undoundidundoingundoes31drawdrewdrawingdraws32withdrawwithdrewwithdrawingwithdraws33fallfellfallingfalls34befallbefellbefallingbefalls35getgotgettinggets36begetbegotbegettingbegets37forgetforgotforgettingforgets38givegavegivinggives39forgiveforgaveforgivingforgives40misgivemisgavemisgivingmisgives
