出现英文的过去式

规则动词的过去式词尾变化有几种：1．一般情况下加ed，如watched,planted,watered,pulled,climbed,picked。2．以不发音字母e结尾的加d，如liked,moved,tasted。3．以辅音字母加y结尾的变y为i再加ed，如study——studied。4．以1个元音字母加1个辅音字母结尾的重读闭音节，双写最后一个辅音字母再加ed，如stop——stopped。词尾读音有3种：a．在浊辅音和元音后读[d]，如lived,watered,listened,played。b．在清辅音后读[t]，如liked,helped,watched。c．在[t],[d]音后读[Id]，如planted,wanted,handed(上交)。不规则动词的过去式变化则没有什么规律，请大家背熟记牢：sit——satthrow——threwam,is——wasdrink——drankdraw——dreware——weresing——sangfly——flewdo——didbegin——begangrow——grewhave,has——hadswim——swamput——putmay——mightgive——gavecut——cutcan——couldring——ranglet——letshall——shouldrun——ranread——readwill——wouldride——rodecatch——caughtgo——wentwrite——wroteteach——taughteat——atedrive——drovethink——thoughthear——heardkeep——keptbuy——boughtsee——sawsleep——sleptfight——foughtfind——foundsweep——swepthold——heldwear——worefeel——felttell——toldmeet——metcome——cameget——gotmean——meantbecome——becamemake——madespeak——spoketake——tooksay——said1）is,am-wasare-were2)begin-beganring-rangdrink-drankswim-swamgive-gavesing-sangsit-satrun-ranhave-hadmake-madecome-cameeat-ate3)write-wroteride-rodespeak-spokedrive-drovestand-stoodtell-toldwin-wonget-gottake-took4)sleep-sleptsweep-sweptfeel-feltkeep-keptspell-speltspend-spentbend-bentmeet-metgo-went5)know-knewfly-flewblow-blewgrow-grewthrow-threwdraw-drew(glow-glowed)6)teach-taughtcatch-caughtbuy-boughtfight-foughtthink-thought7)find-foundhear-heardsay-saidlie-laysee-sawlearn-learntmean-meant8)put-putread-readcut-cutlet-let

一、规则动词的过去式由“动词原形+-ed”构成,具体变化有：1.直接在词尾加-ed.如:want—wanted,work—worked,need—needed,clean—cleaned2.以不发音的e结尾的在词尾加-d.如：like—liked,live—lived,use—used,move—moved3.以一个元音字母加一个辅音字母结尾的重读闭音节动词,先双写结尾的辅音字母,再加-ed.如：stop—stopped,trip—tripped4.以辅音字母加y结尾的动词,先把y变成i,再加-ed.如：study—studied,carry—carried,hurry—hurried,marry—married二、不规则动词的过去式大体上归纳有以下六条记忆法：1.以t结尾的词,过去式与原形相同.如：put—put,let—let,cut—cut,beat—beat2.以d结尾的词,把d变成t.如:build—built,lend—lent,send—sent,spend—spent3.以n结尾的词,在词后加t.如：mean—meant,burn—burnt,learn—learnt4.以ow / aw结尾的词,把ow / aw变成ew.如：blow—blew,draw—drew,know—knew,grow—grew5.含有双写字母的词,将双写改为单写,在词尾加t.如：keep—kept,sleep—slept,feel—felt,smell—smelt6.含有元音字母o / i的词,将o / i变成a.如：sing—sang,give—gave,sit—sat,drink—drank

.一般过去时概念：过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为。2.时间状语：ago,yesterday,thedaybeforeyesterday,lastweek(year,night,month…),in1989,justnow,attheageof5,oneday,longlongago,onceuponatime,etc.3.基本结构：be动词；行为动词4.否定形式：was/were+not;在行为动词前加didn't，同时还原行为动词。5.一般疑问句：was或were放于句首；用助动词do的过去式did提问，同时还原行为动词。6.例句：sheoftencametohelpusinthosedays.ididn'tknowyouweresobusy.过去完成时：1.概念：以过去某个时间为标准，在此以前发生的动作或行为，或在过去某动作之前完成的行为，即“过去的过去”。2.时间状语：before,bytheendoflastyear(term,month…),etc.3.基本结构：had+done.4.否定形式：had+not+done.5.一般疑问句：had放于句首。6.例句：assoonaswegottothestation,thetrainhadleft.bytheendoflastmonth.wehadreviewedfourbooks

be,am ,is -was are-were begin-began break-kroke bring-brought build-built buy-bought can-could catch-caught come-came do-did draw-drew drink-drank drive-drove eat-ate fall-fell feed-fed feel-felt find-found fly-flew forght-forgot get-got go-went have,has-had hear-heard hold-held keep-kept knoe-knew learn-learnt,learned leave-left let-let make-made may-might mean-meant meet-met must-must put-put read-read ride-rode ring-rang run-ran say-said see-saw sell-sold shall-should shoe-shoeed sing-sang sit- sat sleep-slept speak-spoke stand-stood swim-swam take-took teach-taught tell-told think-thought throw-threw understand-understood will-would write-wrote