Unit5UsingLanguage公开课课件高中英语人教版选择性

2019新人教高中英语选择性必修一

Unit5UsingLanguage

EvaluatechemicalfarmingandorganicfarmingTeachingobjectives:1.Enablestudentstoknowthedifferencebetweenchemicalfarmingandorganicfarming.2.Toknowthestructureofanargumentativeessay.3.Toknowthewritingskillsofanargumentativeessay,suchasillustrating,givingexamplesormakingcontrast.4.Towriteanargumentativeessayusingwhattheywilllearninthisperiod.Step1Task1Makingpredictions1.Lookatthetitleofthepassageandtrytoguesswhatwillbetalkedinthepassage.2.Ifyouwereaskedtowritethepassageunderthistitle,whatisyourstructure?Whatthetextwilltalkaboutwillinclude:thedefinitionsofbothkindsoffarmingandtheadvantagesanddisadvantagesofeach.ChemicalfarmingVs

OrganicfarmingChemicalfarmingorganicfarmingadvantagesdisadvantagesadvantagesdisadvantagesMychoice/attitudeThestructureofthetextorganicfarmingchemicalfarmingorganicfarmingorganicfarmingchemicalfarmingorganicfarmingStepIITestourpredictionReadthetextquicklyandsilentlyandtrytofindwhatisthemainideaofeachparagraph.Andthendrawthemapofthestructure._____________________________________________________________Para.2_____________________________________________________________Para.3_____________________________________________________________Para.4_____________________________________________________________Para.5_____________________________________________________________Chemicalfarminghelpfightcropdiseaseandincreaseproduction.(advantage)Threedisadvantagesofchemicalfarming.(disadvantages)Thedefinitionoforganicfarmingandoneofitsadvantages.(advantage)Otherdifferentmethodsoforganicfarmingandtheiradvantages.(advantages)

Thedisadvantageoforganicfarmingandshowtothereaderstheattitudeofthewriter.(disadvantage&attitude)ChemicalfarmingadvantageAgreatwayto__________________________________________.disadvantagesKillnotonly_______________________________butalso_____________________.Affectnotonly_____________butalso____________________________________.Cropsarelackingin______________.OrganicfarmingadvantagesThesoilisrichin____________.Keep_______________________freeofchemicals.Avoiddamageto________________________________.disadvantageNowherenearableto______________________.Thewriter’sattitudeHe/Sheisfor________________.Butthereisstillalongwayto______________________________.fightcropdiseaseandincreaseproductionharmfulbacteriaandinsects

helpfulonesthecropstheanimalsandhumanswhodigestthemnutritionmineralsair,soil,waterandcropstheenvironmentortopeople’shealthmeettheneedorganicfarmingfindasuitablesolutionStepIVReadingfortheorganizationandlanguageTask1Readthetextcarefullyagainandfindoutthetransitionalwordsandthinkabouttheirfunctions.Task2Discussthefollowingquestions.1.Whatotheradvantagesanddisadvantagesoforganicfarmingdidtheauthornotlist?2.Whichkindoffarmingdoyoulike?Andwhy?Forexample;notonly...butalso;inaddition;inturn;infact;asfor;...,but...;...,and...aswell.Advantages:organicfoodaremorenutritiousandhavemuchflavour.Farmerscangetmoremoneyoutoforganicfarming.Disadvantages:highercostofproducingfood;greatereffortrequiredtofarm.Ilikeorganicfarming.Becauseorganicfoodaremoredeliciousandmorehealthy.StepVWritinganargumentativeessaygivingyouropiniononchemicalororganicfarming.Task1Completetheoutlinebelow.Topicsentence:Inmyopinion,___________farmingispreferableto__________farmingbecause________________________________________Point1___________________________________________________________(Detail)________________________________________________________Point2___________________________________________________________(Detail)_________________________________________________________Point3___________________________________________________________(Detail)_________________________________________________________Conclusion:______________________________________________________organicchemicalchemicalfarmingdoesharmtonotonlytheenvironmentbutalsopeopleChemicalfarmingharmstheenvironmentChemicalpesticidesarenotfundinnature,andnormalnaturalprocessescannotgetridofthemChemicalfarmingharmsuspeopleWeendupeatingplants,diaryproducts,eggs,andmeatthathavehighlevelsofpesticidesOrganicfoodisgenerallymorenutritiousthanfoodgrownwithman-madechemicalsIwouldliketosuggestbuyingorganicfood.Task2Useyouroutlinetowriteashortessaygivingyouropiniononthetopic,payingattentiontousingrighttransitionalwords.Task3Exchangeposterswithanotherpair.Usethischecklisttogivethemhelpfulfeedback.√Doesthewriterdoagoodjobofexpressinghis/heropinion?√Doeseachparagraphhaveonemainidea?√Doeseachparagraphhaveatonedetailtosupportitsmainidea?√Doesthewritersequencethepointsinlogicalorder?√Doesthewriterdogcodjobpersuadingyoutoaccepthis/heropinion?Task4Polishyourdraftsandsharewithyourpartners.LanguagePointsorganicwidespreaddigestessentialmineral

alternative

groceryinstancedepth

rootentirelyaspect相应地;转而;依次;轮流随着时间的推移例如;比如集中于防止……做……对……没有影响进行研究建立执行把……和……分开1.inturn相应地;转而;依次;轮流digestvt.&

vi.消化vt.领会;领悟【教材原句】Thisaffectsthecropsgrownonthelandand,inturn,theanimalsandhumanswhodigestthem.这影响到种在土地上的庄稼,进而影响动物和消化这些作物的人。【词汇精讲1】inturn相应地;转而;依次;轮流Sheaskedthesamequestionofeveryoneinturn.她依次向每一个人问同样的问题。Inthecitysquarestheneonlightsflashedinturn.在城市广场上,霓虹灯依次闪烁。【词汇拓展】Duringthesummerholidays,theteacherswereondutybyturns.暑假期间,老师们轮流值班。Whenitis

myturn,Irealizedwhytheprocesswasmovingsoslow.当轮到我的时候,我明白进程为什么这么慢了。【词汇精讲2】digestvt.&

vi.消化vt.领会;领悟Hehastoavoidfatbecausehisbodycan’tdigestit.他不得不避免吃脂肪,因为他的身体无法消化它。Ineedsometimetodigestinformation.我需要一些时间来理解信息。【词汇拓展】Noliquidsareservedwithmealsbecausetheyinterferewithdigestion.上饭菜时不要同时上汤水或饮品,因为这会【词汇拓展】It

is

essential

thatwe(should)dealwiththeproblem.我们很有必要处理这个问题。It

is

essential

to

knowwheretheproblemlies.有必要知道问题在哪里。3.alternativen.可供选择的事物adj.可供替代的;非传统的【教材原句】Asanalternative,somefarmershaveswitchedtoorganicfarming,andmanycustomershaveturnedtoorganicfoodwhentheyshopatthelocalgrocery.作为一种选择,一些农民转向了有机农业,许多顾客在当地商店购物时转向了有机食品。【词汇精讲】alternativen.可供选择的事物adj.可供替代的;非传统的Hegaveinonlyatthelastmomentbecausehehadnoalternative.他只是在最后一刻因为没有选择才做了让步。Wewillhavetorelymoreonalternativeenergy,suchassolarandwindpower.我们将不得不更多地利用可代替的资源,比如太阳能和风能。【词汇拓展】IfhewantstogotoHongKongtonight,hehasnoalternativebuttogobyair.如果他今晚想去香港,除了坐飞机外别无选择。【词汇拓展】Shehasmasteredseveralforeignlanguages,for

instance,French.她精通几种语言,例如法语。1.Therefore,thereisstillalongwaytofindasuitablesolutionthatputssufficientfoodonthedinnertablewhilekeepingpeopleandtheenvironmentashealthyaspossible.因此,要找到一个合适的解决方案还有很长的路要走,该方案可以在餐桌上提供足够的食物,同时又要尽可能保持人和环境的健康。【句式剖析】本句是一个复合句。thereisstillalongway...是主句,thatputs...是定语从句,whilekeeping是省略句。as...aspossible尽可能……。Pleaserespondtomeasquicklyaspossible.请尽快给我回信。Hedesiredthathisbookbereadbyasmanypeopleaspossible.他希望有尽可能多的人读他的书