一般过去时动词的变化规则

一般过去时（一）动词过去式的构成：（1）规则变化：构成规则原形过去式在词尾加edwalk，help,watchwalked,helped,watched以字母e结尾的词直接加dlive,hope,exercise,lived,hoped,exercised,重读闭音节的词先双写尾字母，然后加edplan,stopplanned,stopped以“辅音字母+y”结尾的词先改y为i，再加edstudy,worry,studied,worried,（2）不规则变化：①过去式不改变：这一类不规则变化的动词都是以-t或者以-d结尾的。cost—costcut—cuthit—hithurt—hurtlet—letput—putread—read②有字母组合-ee或者-ll的动词。省略原形动词中两个相同的字母中的其中一个,然后在词尾叫-t。keep—keptsleep—sleptsweep—sweptfeel—feltsmell—smeltspell—spelt③以字母-d或者-t结尾、中间的字母组合多数是-ee或者-oo的动词，省略原形动词中两个相同字母中的其中一个。meet—metshoot—shot④把原形动词的最后一个字母-d改成-t。send—sentlend—lentrend—rentspend—spentbuild—built⑤动词原形中有-ow,-aw这些字母组合的，过去式中把这些组合改成-ew。blow—blewgrow—grewknow—knewthrow—threwdraw—drew⑥动词原形中有字母组合-in(m)或者-ing或者-ink，过去式中把字母-i变成-a。begin—begansing—sangring—rangdrink—drankswim—swam⑦不规则动词以-m,-n结尾的，过去式在原形动词词尾加-t或者-d。mean—meantlearn—learntdream—dreamhear—heard⑧过去式有-ought,-aught的。think—thoughtbuy—boughtbring—broughtteach—taughtcatch—caught⑨动词原形是以元音字母-i加辅音字母加不发音的-e结尾的，一般是在过去式中将字母i改成-o。ride—rodewrite—wrotedrive—drove⑩动词原形中有-ea或者-ee或者-oo的字母组合的不规则动词，动词过去式是将这个字母组合改成-o，然后在词尾加-e。break—brokespeak—spokechoose—chose(11).动词原形中有字母组合-ay的，过去式改成-aid。say—saidpay—paid（二）一般过去时的各种句式：肯定句：主语+动词过去式+其他.IwatchedTVathomelastnight.否定句：主语+didn’t+动词原形+其他.Ididn’twatchTVathomelastnight.一般疑问句：Did+主语+动词原形+其他？DidyouwatchTVathomelastnight?→Yes,Idid./No,Ididn’t.殊疑问句：特殊疑问词+did+主语+动词原形+其他？Whatdidyoudoathomelastnight?（三）常见的标志词：justnow,amomentago,lastweek/night/month/year,yesterday,thedaybeforeyesterday…