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1、规则变化【过去式的变化规则】①一般情况下，在动词原形后直接加ed。如：want---wanted，play---played②以不发音的字母e结尾的动词，直接加d。如：hope---hoped，live---lived③重读闭音节单词需双写最后一个辅音字母，再加ed。如：stop---stopped,prefer---preferred④以辅音字母+y结尾的动词变y为i，再加ed。如：study---studied，worry---worried⑤有些动词不符合上面的规则，需要特殊记忆。如：am(is)-w
2、as,are-were,go-went,eat-ate,swim-swam,buy-bought,see-saw,teach-taught,bring-brought,think-thought,fall-fell,hurt-hurt,break-broke,win-won,lose-lost动词过去式变化规则AAA型（动词原形、过去式、过去分词同形）cost（花费）costcostcut（割）cutcuthit（打）hithithurt伤害）hurthurtlet（让）letletput（放）putput
3、read（读）readread(2)AAB型（动词原形与过去式同形）beat（跳动）beatbeaten(3)ABA型（动词原形与过去分词同形）become（变成）becamebecomecome（来）camecomerun（跑）ranrun(4)ABB型（过去式与过去分词同形）dig（挖）dugdugget（得到）gotgothang（吊死）hangedhangedhang（悬挂）hunghunghold（抓住）heldheldshine（照耀）shoneshonesit（坐）satsatwin（赢）wo
4、nwonmeet（遇见）metmetkeep（保持）keptkeptsleep（睡）sleptsleptsweep（扫）sweptsweptfeel（感觉）feltfeltsmell（闻）smeltsmeltleave（离开）leftleftbuild（建设）builtbuiltlend（借出）lentlentsend（传送）sentsentspend（花费）spentspentlose（丢失）lostlostburn（燃烧）burntburntlearn（学习）learntlearntmean（意思是）m
5、eantmeantcatch（抓住）caughtcaughtteach（教）taughttaughtbring（带来）broughtbroughtfight（战斗）foughtfoughtbuy（买）boughtboughtthink（想）thoughtthoughthear（听见）heardheardsell（卖）soldsoldtell（告诉）toldtoldsay（说）saidsaidfind（找到）foundfoundhave/has（有）hadhadmake（制造）mademadestand（站）
6、stoodstoodunderstand明白understoodunderstood(5)ABC型（动词原形、过去式与过去分词三者不同形）begin（开始）beganbegundrink（喝）drankdrunkring（铃响）rangrungsing（唱）sangsungswim（游泳）swamswumblow（吹）blewblowndraw（画）drewdrawnfly（飞）flewflowngrow（生长）grewgrownknow（知道）knewknownthrow（投掷）threwthrownsh
7、ow（出示）showedshownbreak（打破）brokebrokenchoose（选择）chosechosenforget（忘记）forgotforgotten(forgot)speak（说，讲）spokespokenwake（醒）wokewokedrive（驾驶）drovedriveneat（吃）ateeatenfall（落下）fellfallengive（给）gavegivenrise（升高）roserisentake（取）tooktakenmistake（弄错）mistookmistakenri
8、de（骑）roderiddenwrite（写）wrotewrittendo（做）diddonego（去）wentgonelie（平躺）laylainsee（看见）sawseenwear（穿）worewornbe(am,is,are)（是）was,werebeen①一般情况下，在动词原形后直接加ed。如：wanted，played。②以不发音的字母e结尾的动词，直接加d。如：hoped，lived。③重读闭音节单词
