Bunit4一般过去时的用法.ppt

一般过去时的用法：,1.表示过去的动作或状态，常和明确的过去时间状语连用，如：yesterday,lastweek,threedaysago,in1998等，或与由when引导的从句。eg.Isawhimyesterday.Sheboughtthebiketwoyearsago.Hewastherejustnow.Wheredidyoulivewhenyouwereyoung?,2.也可以表示过去某一段时间内经常或反复出现的动作。句子中常带有everyday,often,usually,always,sometimes等时间状语。WhenIstudiedintheuniversity,Ireadaloudeverymorning.Inthepastfewyears,Iusuallywenttouringduringmysummervocations.,一般过去时的形式:动词be:第一人称单数和第三人称单数用was,其余的人称一律用were。动词have:一律用had,没有人称和数的变化。行为动词：一律用过去式，没有人称和数的变化，行为动词的过去式有两类，一类是规则动词，另一类是不规则动词。,动词过去时规则变化1直接加edworkedhelped2以不发音的e结尾的+dhopedliked3以辅音字母+y结尾的，变y为i加edStudiedtried4以重读闭音节结尾的，双写最后的辅音字母+edstoppedplannedreferred,不规则变化关于规则动词过去式的变化（在词尾加ed）大家已经了如指掌了，但对那些不规则动词的过去式的变化，记忆起来总是有一定难度这里教给大家一些“妙招”不妨一试哦！1.中间去e末尾加t如：keepkeptfeelfeltsleepsleptsweepswept2结尾d变t如：buildbuiltlendlentsendsentspendspent3.遇见i改为a如：ringrangsitsatdrinkdranksingsangswimswambeginbegangivegave,4.骑（马）开（车）写（字）把i变o如：riderodedrivedrovewritewrote5“想”“买”“带来”“打仗”ought换上如：thinkthoughtbuyboughtbringbroughtfightfought6“教书”“抓住”aught切莫忘如：teachtaughtcatchcaught7.owaw该为ew是新时尚，如：knowknewgrowgrewthrowthrewdrawdrew8.“放”“让”“读”过去式与原形一个样，如：putputletletreadreadred,练习一：选用恰当的时态，用括号内动词的正确形式填空。LastyearMr.Smith_(go)toChinaandJapan.He_(have)awonderfultime.He_(do)alotofdifferentthingsand_(talk)toagreatnumberofdifferentpeople.He_(eat)ChineseandJapanesefoodand_(visit)alotofinterestingplaces.Whenhe_(go)backtoEngland,he_(be)verytired.,练习二：句型转换：写出下列各句的否定形式（在可能的地方用紧缩形式），1.ProfessorJenningstaughtthemEnglishin1990.2.Tomhadawonderfultimeinxian.3.Maryfoundherkeysinherbedroom.4.XiaoWangsparentslivedinShanghaitenyearsago.5.JanewenttotheGreatwalltwoorthreetimes.,练习三：用词的适当形式填空1.Heatesomebreadand_(drink)somemilk.2._he_(finish)hishomeworklastnight?3.I_(be)tiredyesterday.4.I_(gain)Artsdegreelastyear.5.What_you_(do)ateightoclocklastnight?6.Mygrandfather_(leave)HongkongforNewYorkin1998.7.What_you_(do)thistimeyesterday?,练习四：单选()1._you_atsixoclockyesterday?A.Do,getupB.Did,getupC.Do,gotupD.Did,gotup()2.Whatdidyousee_?A.nowB.everydayC.since1990D.justnow()3.Hewentintotheroomand_thedoor.A.lockB.lockingC.locksD.locked()4.-What_you_lastweek?-Iboughtabag.A.did,buyB.did,boughtC.do,buyD.do,bought()5.-_he_hislunch?-Yes,hedid.A.Have,hadB.Had,hasC.Did,haveD.Did,had,练习五：用词的适当形式填空1.LastweekI_(buy)anewbike.2.He_(be)herejustnow.3.He_(notfind)hiskeylastnight.4.Myfather_(drink)alotofwineyesterday.5._you_(finish)yourhomeworkyesterday?6.I_(eat)someeggsandbreadinthismorning.7.Hermother_(notgiv