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动词第三人称单数变化规则现在分词变化规则动词过去式和过去分词变化规则动词第三人称单数变化规则1)一般情况下，动词后面直接加-s.例如：worksgetssaysreads2)以ch,sh,s,x或o结尾的动词,在后面加-es。例如：go-goesteach-,teachewash-washesbrush-brushes,catch-catches,do-does,fix-fixes3)以辅音字母+y结尾的动词，把y变为i再加-es.例如：study-studiestry-triescarry-carries,fly-fliescry-cries4）不规则的动词：have-has写出下列动词的第三人称单数形式：1.sit--guess--die--2.go--rush--reach--3.touch--brush--fly--4.copy--say--run--5.do--fix--live--6.cry--enjoy--have--2.go--goesrush--rushesreach--reaches3.touch--touchesbrush--brushesfly--flies4.copy--copiessay--saysrun--runs5.do--doesfix--fixeslive--lives6.cry--criesenjoy--enjoyshave--has1.sit--sitsguess--guessesplay--playsExercises一.用所给单词的适当形式填空1.Iusually____(go)runningforhalfanhourattheweekend.2.Mygrandparents______(like)watchingTVverymuch.3.This___(be)mycat.It____(love)me.4.____(be)yoursisteramemberoftheReadingClub?5.Sheoften_____(do)herhomeworkat9:00intheevening.6.Catslike_____(eat)fish.7.We________(nothave)aMusiclessononThursday.8.Hisuncle__________(notget)upearlyonSaturday.golikeislovesIsdoeseatingdon’thavedoesn’tget现在分词变化规则1一般在动词原形词尾加-ing，如：play-playingcarry-carrying2．以不发音的e结尾的动词，先去掉e,再加-ing如：take-takingwrite-writing3．重读闭音节结尾的动词，如果词尾只有一个辅音字母，要将该末尾只有一个辅音字母的重读闭音节词，双写该辅音字母，再加-ing如：stop-stoppingfit-fittingbegin-beginning4.以ie结尾的动词，要把ie改为y，再加-ingliedietielyingdyingtying关于“双写的问题”一般地说，就是一个单词无论多长，在考虑是否“双写”时，只需要看最后3个字母即可--即如果最后3个分别是由“辅元辅”（辅音，元音，辅音）构成的话，那么这个单词就需要“双写”，如果不是，那么就不用了。但是有一个单词是例外，就是listen这个单词，虽说结尾3个字母符合“辅元辅”规则，但是这个单词却不双写，而是listening.另外，比如offer这个词，虽然是“辅+元+辅”结构，但重读在前音，所以还是offering写出下列单词的现在分词形式copyeatgolastobtainreceiveseparatesurviveworrycallcorrectenablegrowlaughoccur写出下列单词的现在分词形式copyeatgolastobtaincopingeatinggoinglastingobtainingreceiveseparatesurviveworrycallreceivingseparatingsurvivingworryingcallingcorrectenablegrowlaughoccurcorrectingenablinggrowinglaughingoccurring写出下列单词的现在分词形式recognizeservetakecostencouragehandlelayofferrecordsettalkwritepreferrefer写出下列单词的现在分词形式recognizeservetakecostencouragerecognizingservingtakingcostingencouraginghandlelayofferrecordsethandlinglayingofferingrecordingsettingtalkwritepreferrefertalkingwritingpreferringreferring动词过去式和过去分词变化规则动词过去式和过去分词有规则变化和不规则变化两种（一）规则变化⑴一般在动词原形后加-edlook-lookedcall-calledopen--opened⑵以-e结尾的动词加-dmove-movedhope-hopedagree-agreed⑶以辅音字母加y结尾的动词，变y为i，再加-edstudy-studiedcarry-carriedtry-tried以原音字母加y结尾的词，直接加-edplayenjoystay⑷末尾只有一个辅音字母的重读闭音节词，双写该辅音字母，再加-edstop-stoppedstep-steppedbeg----________----__________drip----________----________dot----________----________drop----________----________fit----________----________hug----________----________plan----________----________pat----________----________rid----________----________rob----________----________rebet----________----________regret----________----________过去式/过去分词现在分词beg----begged----beggingdrip----dripped----drippingdot----dotted----dottingdrop----dropped----droppingfit----fitted----fittinghug----hugged----huggingplan----planned----planningpat----patted----pattingrid----ridded----riddingrob----robbed----robbingrebet----rebetted----rebettingregret----regretted----regretting（二）不规则变化-----可分为五种情况。1．动词原形、过去式和过去分词完全同形。(AAA型)如cuthit，hurt，put，let，shut，cost，set2．动词原形与过去分词同形（ABA型）如come，run，become，3．过去式与过去分词完全同形。（ABB型）如find，pay，leave，lend，meet，keep，lose，teach，4．动词原形、过去式、过去分词形式完全不同。（ABC型）如give，fly，drink，see，5．过去式和过去分词有两种形式burn，burnedburntburnedburntlearnlearnedlearntlearnedlearntSmellsmelledsmeltsmelledsmeltlie有规则变化和不规则变化两种，lielied,lied（说谎）lielay,lain（躺，位于）hang有规则变化和不规则变化两种hanghanged,hanged（处绞刑）hanghung,hung(挂，吊)I.A－A－A型cost→cost→costcut→cut→cuthit→hit→hithurt→hurt→hutlet→let→letput→put→putset→set→setshut→shut→shutsplit→split→splitspread→spread→spreadupset→upset→upsetburst→burst→burstcast→cast→cast2.A－B－A型become→became→becomecome→came→comeovercome→overcame→overcomerun→ran→run3.A－B－B型bend→bent→bentbleed→bled→bledbring→brought→broughtbuild→built→builtbuy→bought→boughtcatch→caught→caughtdeal→dealt/dealtdig→dug→dugfeed→fed→fedfeel→felt→feltfight→fought→foughtfind→found→foundflee→fled→fledforetell→foretold→foretold4.A－B－C型begin→began→begundrink→drank→drunk(drunkena.)ring→rang→rungsing→sang→sungsink→sank→sunk(sunkena.)spring→sprang→sprungswim→swam→swumblow→blew→blowndraw→drew→drawnfly→flew→flowngrow→grew→grownknow→knew→knownoverthrow→overthrew→overthrownthrow→threw→thrown用所给单词的适当形式填空1.Iliked_____(go)toWangfujing______(buy)gifts.2.Jim________(fall)fromatreelastmonth.3.LastyearIwanted__________(ride)abike,butit_______(be)toohard.4.Hewentshoppingand________(buy)acoatforyou.5.Who______(eat)breadforbreakfastthismorning?6.He_____________(watch)TVeveryday,buthe______________(notwatch)yesterday.7._______Danny_______(hurt)hisarmyesterday?tobuywatcheswasateboughttoridedidn’twatchfellDidhurtgoingExercises用所给动词的适当形式填空1.TomandMary___________(come)toChinalastmonth.2.Mike_________________(notgo)tobeduntil12o’clocklastnight.SoI_______(get)uplate.3.Mary__________(read)Englishyesterdaymorning.4.There_________(be)noonehereamomentago.5.I___________(call)Mikethismorning.6.Ilistenedbut___________(hear)nothing.7.Tom___________(begin)tolearn