七年级三大时态

在英语中，不同时间发生的动作或存在的状态要用不同的动词形式来表现。每种时态的概念、信息词、结构、句式变化、以及某些时态间的相互区别重点掌握时态Tense时态现在进行时：一般现在时：一般过去时：现在正在进行的动作经常或习惯性的动作或存在的状态。过去某个时间或时间段发生的动作或存在的状态。(ThePresentContinuousTense)(TheSimplePresentTense)(TheSimplePastTense)知识结构一般过去时构成用法常用时间动词的过去式1、表示过去某个时间发生的动作或存在的状态。2、表示过去经常或反复发生的动作。yesterdaylastnightin1990twodaysago用法1、表示过去某个时间发生的动作或存在的状态。Hewashereyesterday.Igotupatsixthirtyyesterdaymorning.Myfatherwasatworkyesterdayafternoon.Didyouhaveagoodtimelastsummer?2、表示过去经常或反复发生的动作。Myfatheroftenwenttoworkbybuslastyear.WhenIwasachild,Ioftenlistenedtomusic.常用时间常与一般过去时态连用的时间有：yesterdayyesterdaymorning(afternoon,evening…)lastnight(week,month,year…)twodaysago,aweekago,threeyearsago…in1990,(in1998…)规则动词过去式的构成构成规则例词1、一般在动词原形末尾加–edlooklookedplayplayedstartstarted2、结尾是e的动词加--dlivelivedhopehopeduseused3、末尾只有一个辅音字母的重读闭音节词，先双写这个辅音字母，再加—edstopstoppedplanplannedtriptripped4、结尾是“辅音字母+y”的动词，先变“y”为“i”再加—edstudystudiedcarrycarried清念/t/,元浊/d/;/t//d/之后念/id/规则动词词-ed的读音说明：1、清念/t/，即ed在清辅音后面念/t/,例：finishedhelpedpassedcooked2、元浊/d/,即ed在元音，浊辅音后面念/d/,例：borrowedenjoyedcalledmoved3、/t//d/之后念/id/,即ed在/t//d/音后面念/id/例：wantedshoutedneededcountedPRACTISE改写句子：1、Lucydidherhomeworkathome.（改否定句）Lucy______________herhomeworkathome.2、Hefoundsomemeatinthefridge.（变一般疑问句)______he___________meatinthefridge?3、Shestayedthereforaweek.（对划线部分提问）_________________she_____there?4、Therewassomeorangeinthecup.（变一般疑问句)_____there_____orangeinthecup?didn’tdoDidfindanyHowlongdidstayWasany不规则动词表InfinitivePasttenseamiswasarewerebeginbegunbreakbrokebringbroughtbuildbuiltbuyboughtcancouldInfinitivePasttensecatchcaughtcomecamedodiddrawdrewdrinkdrankdrivedroveeatatefallfell答案1.look2.live3.stop4.carry5.hope6.trip7.call8.finish9.want10.are11.go12.have13.do14.get15.come16.say17.see18.put19.eat20.take21.read动词过去式转换练习将下列动词变为过去式各时态常用的信息词现在进行时：一般现在时:一般过去时:now,Look!Listen!atthistimeWhereis…?Don’ttalk!It’s8:00am.always,usually,often,sometimes,seldom,never,everyday,every…,threetimesadaylastnight,last…,twodaysago,…ago,in1999,in+过去的年份,justnow=amomentago,yesterday,yesterdaymorning现在分词的构成：动词第三人称单数的构成：过去式的构成：①直接加-ing.②重读辅元辅，双写尾字母加-ing.③以e结尾去e加-ing.①直接加-s.②以s,x,ch,sh,o结尾加-es.③以“辅音+y“结尾变y为i再加-es.①直接加-ed.②以e结尾只加d.③重读辅元辅，双写尾字母再加-ed.④以“辅音+y”结尾变y为i再加-ed.have-look-begin-use-shop-get-dance-study-现在分词第三人称单数过去式study-finish-have-go-do-play-watch-give-need-stop-hope-play-try-plan-visit-like-havinglookingbeginningusingshoppinggettingdancingstudyingstudiesfinisheshasgoesdoesplayswatchesgivesneededstoppedhopedplayedtriedplannedvisitedliked改一般疑问句的方法：改否定句的方法：①首先看有无be动词，如果有，将be提到句首并大写，句末打问号.②如果没有be动词，看原句的动词形式来决定借用助动词do/does/did,并且行为动词要还原。V-原形V-s/esV-ed(过去式)+动词原形…?以此类推①首先看有无be动词，如果有，在be动词后面加not.②如果没有be动词，看原句的动词形式来决定借用助动词do/does/did,并在后面加not,并且行为动词要还原。主语+don’t/doesn’t/didn’t+动词原形Do…Does…Did…对比时态动词形式否定句一般问句现在进行时一般现在时一般过去时表格对比学习be+v-ing(现在分词）在be后加上notBe提到句首V-原形V-三人单在行为v.前借用do,does后加not，行为动词还原Do,Does提到句首，行为动词还原V-ed(过去式）在行为v.前借用did后加not，行为动词还原Did提到句首，行为动词还原1.Heisateacher.2.KangkangcomesfromChina.3.Iusuallytakethebustowork.4.Theyarehavingclasses.5.Janeplayedtheguitarlastnight.先（一般疑问句）再（否定句）Isheateacher?Heisn’tateacher.DoesKangkangcomefromChina?Kangkangdoesn’tcomefromChina.Doyouusuallytakethebustowork?Idon’tusuallytakethebustowork.Aretheyhavingclasses?Theyaren’thavingclasses.DidJaneplaytheguitarlastnight?Janedidn’tplaytheguitarlastnight.句型变化操练判断时态形式：1.Healwayslikesplayingthepiano.()2.WearehavinganEnglishclassesnow.()3.Theyoftengohomelate.()4.Lucydancedthediscoatthepartylastnight.()5.IlikedgotothezoowhenIwasyoung.()6.Myteacherisfriendlytous.()7.Look!Theyareplayingfootball.()8.Shewasbornin1990.()9.Ilostmuchmoneylastnight.（）A.现在进行时B.一般现在时C.一般过去时ABCABBCCC判断下列信息词是属于哪种时态lastnightnoweverydayLook!yesterdayoftenListen!twoyearsagoalwaysin1897threetimesaweek一般现在时一般过去时现在进行时Fillintheblankswiththerightformoftheverbs:1.I_____(be)illlastSunday.2.Amy_____(sit)hereyesterday.3.____you______(clean)yourroomjustnow.4.Mysister_____(be)bornonJune5.1996.5._____(be)yourparentsathomejustnow?6.He_______(study)Frenchherelastyear.7.She_____(do)homeworklastnight.8.They_____(go)tothezooyesterdaymorning.9.We_____(have)apartylastSaturday.10.Joy______(visit)meyesterdayevening.11.They______(live)heretwoyearsago.12.He_____(be)hereamomentago.wassatDidcleanwasWerestudieddidwenthadvisitedlivedwas用所给动词的适当形式填空。1.Listen!Mary_________(sing)now.2.Ayoungman__________(run)ontheplaygroundnow.3.Mymother_________(watch)TVplayeveryday.4.OldBush________(visit)Chinaagainlastmonth.5.I______(play)sportsthreetimesaday.6.Look!LucyandLily____________(read)books.7.There_______(is)afootballmatchyesterdayafternoon.8.Ourclass______(go)tothezoothreedaysago.issingingisrunningwatchesvisitedplayarereadingwaswent过去式的不规则变化blow-buy-can-come-do-eat-fall-find-forget-get-give-go-have-know-learn-make-meet-read-run-say-see-send-sit-take-think-will-tell-begin-teach-catch-blewboughtcouldcamedidatefellfoundforgotgotgavewenthadknewlearntmademetreadransaidsawsentsattookthoughtwouldtoldbegantaughtcaught答案1.look2.live3.stop4.carry5.hope6.trip7.call8.finish9.want10.are11.go12.have13.do14.get15.come16.say17.se