初中一般过去时ppt课件

.,一般过去时,.,一、定义动词的一般过去时态表示过去发生的动作、情况或存在的状态。行为动词（即实义动词）的过去式没有人称和数的变化。,.,二、谓语动词的构成形式一般过去时的谓语动词有be动词和行为动词两种基本形式。类比一般现在时：（1）当谓语动词是be(am,is,are)动词时，am/is变为was,are变为were。在否定句中，直接将not添加在was/were之后.疑问句时，将was/were置于主语之前即可。e.g.肯：Iwasillyesterdaymorning.否：Iwasntillyesterday.,.,一般疑问句：Wereyouillyesterdaymorning?Yes,Iwas./No,Iwasnt.特殊疑问句：Howwasshe？（2）当谓语动词是行为动词时，将对应的一般现在时肯定句中的行为动词变成过去式；否定及疑问句中的do/does变成did即可动词仍用原形，即“见did，也用动原”。一般现在时一般过去时,e.g.Shelikesdancing.Shedoesntlikedancing.Doesshelikedancing？Whatdoesshelike？,Shelikeddancing.Shedidntlikedancing.Didshelikedancing？Whatdidshelike？,.,规则过去式变化规律：,不规则变化有：seesawdodidgowentam/iswasarewerehas/havehad等,.,写出下列动词的过去式1.study_2.go_3.turn_4.are_5.play_6.have_7.stop_8.clean_9.is_10.love_,.,三、一般过去时的用法1.表示在过去时间里发生的动作或存在的状态e.g.LiuJiegotupat7:10thismorning.Hewasastudentthreeyearsago.2表示过去经常或反复发生的动作。e.g.Zhangalwayswenttoschoolbybikelastterm.3表示已故人所做的事情。e.g.ComradeLeiFengdidgooddeedsinhislife.(雷锋同志做了一生的好事。),.,4.表示过去所发生的一系列的动作，而这一系列的动作是从现在的角度来考虑的，不是从动作相互之间的关系这一角度来考虑的。e.g.MissLiugotupatsevenoclockthismorning,dressed,hadbreakfast,andwenttowork.,.,四、一般过去时常用的时间状语1.yesterday或以其构成的短语：yesterdaymorning(afternoon,evening)等；2.由“last+一时间名词”构成的短语：lastnight,lastyear(winter,month,week)等；3.由“时间段+ago”构成的短语：amomentago,ashorttimeago,anhourago等；4.由“介词+一时间名词”构成的短语：onFriday,onMondaymorning,onApril15,onthenightofOct.1，in1980；,.,5.频度副词：often,always等；6.其它：then,justnow,once,以及由after或before构成的介词短语等；7.由某些表示过去时态的从句等。比较：Heis15now.Hewas14lastyear.HewasbornonJanuary12,1991.,.,练一练：1,Sheoften_(go)toschoolateightoclock.2,Theyare_supper.(eat)3,Heusually_upat17:00.(get)4,She_(live)inBeijinglastyear.5._(be)thereafly(苍蝇)onthetablejustnow?6.I_(call)Mikethismorning.7.Lastweekwe_(pick)manyapplesonthefarm.8.Mymother_(notdo)houseworkyesterday.,.,常见错误一、把动词变成过去式易出错例:1Theystoped(stop)talkingjustnow.2Theyplaied(play)footballyesterday.答案:1stopped2played解析:我们可以记住下面的口诀:动词变成过去式,双写规律要牢记;y前若是辅音字,y变i加-ed;y前若是元音字,只须直接加-ed.二、忘记把动词变成过去式例:Ifly(fly)kitesontheafternoonofSunday.答案:flew解析:我们可以记住下面的口诀:一般过去时态里,过去形式莫忘记.,.,三、在句式变换时易出错例:1Wedidntwent(notgo)outlastFriday.2Didyouhad(have)agoodtimeyesterday?答案:1didntgo2Didhave解析:请记住口诀见助动,用原形.四、易与单三人称作主语的一般现在时弄混例:Hetaughts(teach)meEnglishlastyear.答案:taught解析:行为动词的过去式无人称和数的变化.即使主语是单三人称,也和其它人称所用动词的形式一样.,.,真题演练：1.（07中考）When_yourbrother_back?Abouthalfanhourago.did;comeB.had;comeC.do;comeD.have;come2.（08中考）When_yourmother_youthatbluedress,Mary?Sorry,Ireallycantremember.A.does;buyB.has;boughtC.had;boughtD.did;buy3.（09中考）When_Jessy_toNewYork？Yesterday.A.does;getB.did;getC.has;gotD.had;got,.,改错题HowisJaneyesterday?_Hegetstoschoolatsixyesterday._Heoftengoeshomeat6:00lastmonth._Icanflykitessevenyearsago._Didyousawhimjustnow._TomwasntwatchTVlastnight._Ididmyhomeworklater._Hewaitforyouthreehoursago._Whofinditjustnow?_,.,句型转换1.TheycametoChinain1990.(变一般疑问句)_they_toChinain1990?2.Iwasillfortwodayslastweek?(同上)_youillfortw