英语选修8人教版新课标Unit5第3课时教案TheThirdPeriodLanguagestudyTeachinggoals教学目标1.Targetlanguage目标语言Grammar:Presentperfectcontinuoustense.2.Abilitygoals能力目标Enablethestudentstousethepresentperfectcontinuoustense.3.Learningabilitygoals学能目标Helpthestudentslearnhowtousethepresentperfectcontinuoustense.Teachingimportant&difficultpoints教学重难点Howtousethepresentperfectcontinuoustense.Teachingmethods教学方法Explanationandpractice.Teachingaids教具准备Aprojectorandacomputer.Teachingprocedures&ways教学过程与方式StepⅠRevisionCheckthehomework.Letsomestudentsreadtheirwork.Asampleversion:AbriefintroductiontotheZhoukoudianCavesZhoukoudianisasmallvillagesituatedabout50kmsouthwestofBeijingIn1928,DrC.C.Young,afamousChinesepaleontologist,andWenzhongPei,ayoungChinesegeologistjoinedtheexcavation.TwolowerjawsofPekingManwereunearthedinthisyear.Tomaketheexcavationmoresuccessful,DrWengandDrBlackestablished“CenozoicResearchLaboratory”in1929.ThePekingManSitealsoprovidesthemoreprecisescientificdataforthestudyoftheevolution,behaviour.OnthewesternsideofZhoukoudianVillage,therearetwoparallelhills.TheoneontheeastislowerandcalledDragon-boneHill.Zhoukoudianisarelicofprimitiveculture,48kilometerssouthwestofdowntownBeijing,whereLonggushan(dragonskeletonmountain)isstanding.Severaldecadesago,localfarmersminedlimestoneinZhoukoudian,cameuponsomebonefossilsandcalledthem“theDragonBones”.Zhoukoudianbecameknownas“DragonBoneMountain”.Drugstorespurchasedthebonesasamedicalingredient.Thenewsaboutthe“magicbones”drewattentionofscientists.In1929theselimestonecavesbecameworldfamouswiththediscoveryofaskullandtwoteethdatingback200,000to500,000years.TheywerenamedPekingman.ThehistoricalandculturalvalueoftheZhoukoudiansitehasbeenacknowledgedbyitslistingasaWorldHeritageSiteinDecember1987attheeleventhsessionofUNESCO.StepⅡLead-inAskthestudentstopointoutthesentencesthatcontainthestructureasin“Wehavebeenexcavatinghereformanyyears...”Samplesentences:1.Wehavebeenfindingthebonesoftigersandbearsinthecavesandwethinktheseweretheirmostdangerousenemies.2.Wehavebeenexcavatinglayersofashalmostsixmetersthick,whichsuggeststhattheymighthavekeptthefireburningallwinter.3.Yes,indeed,asthebotanicalanalyseshavebeenspecificallyshowingus,allthefieldsaroundhereusedtobepartofalargeshallowlake.T:Whatisthesamestructureinthesesentences?S:“have/hasbeendoing...”T:Yes,inthisunit,wewilllearn“have/hasbeendoingsth.”Thatisthepresentperfectcontinuoustense.StepⅢExplanationPresentPerfectContinuous[HAS/HAVE]+[BEEN]+[V+ing]Examples:Ihavebeenwaitingherefortwohours.ShehasonlybeenstudyingEnglishfortwoyears.Note:WhenyouareusingaverbtensewithmorethanonepartsuchasPresentPerfectContinuous(hasbeenstudying),adverbsoftencomebetweenthefirstpartandthesecondpart(hasonlybeenstudying).Use1DurationfromthePastuntilNowT:WeusethePresentPerfectContinuoustoshowthatsomethingstartedinthepastandhascontinuedupuntilnow.“forfiveminutes”,“fortwoweeks”,and“sinceTuesday”arealldurationswhichcanbeusedwiththePresentPerfectContinuous.Lookatthefollowingexamples.Showthefollowing.Theyhavebeentalkingforthelasthour.Shehasbeenworkingatthatcompanyforthreeyears.JameshasbeenteachingattheUniversitysinceJune.Use2Recently,LatelyT:YoucanusethePresentPerfectContinuouswithoutadurationsuchas“forfiveminutes”,“fortwoweeks”,and“sinceTuesday”.Withoutthedurations,thetensegiv...
