Unit+5+Working+the+Land+Using+Language+(II)+課件【知識(shí)精講精研】高中英語(yǔ)人教版（2019）選擇性必修第一冊(cè)

Unit5Period4UsingLanguage(Ⅱ)EvaluatechemicalfarmingandorganicfarmingDoyouknowwhatsubstanceisputinthesoiltomakeplantsgrow?新課導(dǎo)入Itisfertiliser.1.能通過(guò)閱讀語(yǔ)篇了解化學(xué)農(nóng)業(yè)與有機(jī)農(nóng)業(yè)的區(qū)別及其優(yōu)缺點(diǎn)，學(xué)習(xí)議論文的結(jié)構(gòu)；2.寫一篇文章來(lái)表達(dá)你對(duì)化學(xué)農(nóng)業(yè)或有機(jī)農(nóng)業(yè)的看法。課堂學(xué)習(xí)Pre-readingLookatthetitle,anddoyouknowwhatthepictureshows?

CHEMICALVERSUS

ORGANICFARMINGWhere?What?Why?Organic

farmingissimplyfarmingwithoutusinganychemicals.ChemicalfarmingWhile-readingReadthetext,andanswerthequestions:1.Whatischemicalfarming?Chemicalfarmingisfarmingusingchemicalpesticidesandartificialfertilizers.2.Whatisorganicfarming?Organicfarmingissimplyfarmingwithoutusinganychemicals.

COrganicmethodsforproducingrichsoil

DTheproblemswithchemicalfarmingPara.1-2Para.3Para.4Para.5

AWhatorganicfarmingis

BWhyman-madechemicalsarestillusedinfarmingReadandmatch.Readthetext,andthenanswerthequestions.11.Whydidmanyfarmerswelcometheintroductionofchemicalfarming?2.Whatconcernsmanypeopleabouttheuseofpesticides?3.Whatisoneproblemwiththeuseofchemicalfertilisers?Manyfarmerswelcomedthemasagreatwaytofightcropdiseasesandincreaseproduction.Theirlong-termusecansometimesharmboththelandandpeople’shealth.Cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.4.Howisorganicfarmingdifferentfromchemicalfarming?5.Whydoorganicfarmerschangethekindofcropgrowninafieldeveryyear?

Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans.Differentcropsaregrownbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.Thencompletethesentencesinthetable.2Para.MainideaDetail1—2Pesticidescankillhelpful

_____________________.Somepesticideshavebeen__________becauseofthe________________.Cropsgrownwithchemicalfertilisersusually_____________tobe

fullof_____________.bacteriaandinsectsprohibiteddamagetheycausegrowtoofastnutritionDPara.MainideaDetail3Manyorganicfarmersuse

________________________asfertiliser.4

Theyoften_____________________grownineachfield___________.Theyalsoplantcropsthatuse______________ofthesoiltohelp

keepitrich.5

Organicfarmingisnowherenearabletomeetthehigh________________________________.naturalwastefromanimalschangethekindofcropeveryyeardifferentdepthsneed/demandforfoodaroundtheworld

ACBPost-readingWhatisthegoalofusingorganicfarmingmethods?Doyouthinkitcanbereached?Whyorwhynot?Thegoalofusingorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople'shealth.Yes,Ithinkthisgoalcanbereached.Farmersworkedforcenturieswithoutusinganykindsofchemicalsandwithoutharmingtheenvironment,andthefoodtheyproducedwasjustfine.Languagepoints1.【教材原句】Thisaffectsthecropsgrownonthelandand,in

turn①,theanimalsandhumanswhodigest②them.這會(huì)影響土地里種植的作物,繼而影響消化這些作物的人畜。①【詞匯精講】inturn相應(yīng)地;轉(zhuǎn)而;依次;輪流【詞匯拓展】byturns輪流;交替地inone’sturn 輪到某人;接著taketurnstodosth 輪流做某事itisone’sturntodosth 輪到某人做某事單句語(yǔ)法填空(1)Nowthatwehavefinishedthedesign,itistheirturn

(construct).

(2)Thetwodaughterslookedaftertheirsickmother

turns.toconstructby②【詞匯精講】digestvt.&

vi.消化vt.領(lǐng)會(huì);領(lǐng)悟【詞匯拓展】digestionn.消化;領(lǐng)悟digestiveadj.

助消化的

用digest的適當(dāng)形式填空(1)Nutrientsfromthe

foodcanbeabsorbedintotheblood.

(2)Largemealsoverloadthe

system.digested

digestive2.【教材原句】Infact,somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.事實(shí)上,由于對(duì)人類和環(huán)境有害,“滴滴涕”等農(nóng)藥在大多數(shù)國(guó)家已被禁用?！揪涫狡饰觥縝ecauseof因?yàn)椤?是介詞短語(yǔ),常用作原因狀語(yǔ),后面跟名詞或代詞作賓語(yǔ)?！緶剀疤崾尽縝ecause是連詞,其后接句子;becauseof是復(fù)合介詞短語(yǔ),其后接名詞、代詞、動(dòng)詞-ing形式、what引導(dǎo)的從句等,它在句中一般做狀語(yǔ)，表示引起事件發(fā)生的直接原因。e.g.Theteachergotangrybecauseofwhatwehaddoneinclass.。3.【教材原句】Asforchemicalfertilisers,cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.至于化肥,用它們種植的作物通常長(zhǎng)得太快,不能提供豐富的營(yíng)養(yǎng)?！揪浞ǚ治觥烤渲械膖oofasttoberichinnutrition為too...to...結(jié)構(gòu)。too...to...意為“太……而不能……”,表示否定含義。在該結(jié)構(gòu)中,too為副詞,修飾形容詞或其他副詞。to為不定式,后跟動(dòng)詞原形。不定式做結(jié)果狀語(yǔ),常用主動(dòng)形式,其邏輯主語(yǔ)有時(shí)是句子的主語(yǔ);若不是,不定式的邏輯主語(yǔ)通常由for引出。完成句子(1)我想提醒你們,無(wú)論何時(shí)開始學(xué)習(xí)都不遲。Iwanttoremindyouthatit’s_______________learn.never

too

late

to

4.【教材原句】Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthanessentialminerals,andtheyoftenhavelessflavouraswell.此類作物外表靚麗,而內(nèi)里卻經(jīng)常是水分多于必需礦物質(zhì),并且往往口感較差?！驹~匯精講】essentialadj.完全必要的;極其重要的【詞匯拓展】beessentialto/for對(duì)……是必要的itisessentialthat...(should)do... 做……是必要的itisessentialtodo... 做……是必要的5.【教材原句】Asanalternative,somefarmershaveswitchedtoorganicfarming,andmanycustomershaveturnedtoorganicfoodwhentheyshopatthelocalgrocery.作為一種替代方法,有些農(nóng)民已經(jīng)轉(zhuǎn)向有機(jī)耕作,而且許多消費(fèi)者在當(dāng)?shù)厥畴s店購(gòu)物時(shí),也轉(zhuǎn)而選擇有機(jī)食品?！驹~匯精講】alternativen.可供選擇的事物adj.可供替代的;非傳統(tǒng)的【詞匯拓展】analternativeto...

……的替代物(to是介詞)havenoalternativebuttodosth別無(wú)選擇只好做某事havethealternativeofdoingsth有做某事的選擇6.【教材原句】Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.為什么要種植不同的作物,是因?yàn)樗麄儼阎匾牡V物質(zhì)放回地里,讓它為下一批作物做好準(zhǔn)備?！揪浞ǚ治觥勘揪涫菑?fù)合句，主語(yǔ)是由主語(yǔ)從句Whydifferentcropsaregrown充當(dāng)，is是系動(dòng)詞，表語(yǔ)是由表語(yǔ)從句becausetheyputimportantmineralsbackintotheground充當(dāng)。makingitready...動(dòng)詞-ing形式短語(yǔ)做結(jié)果狀語(yǔ)。動(dòng)詞-ing形式短語(yǔ)做結(jié)果狀語(yǔ),相當(dāng)于一個(gè)并列謂語(yǔ),所表示的是謂語(yǔ)動(dòng)詞的直接結(jié)果,是意料中的結(jié)果?！緶剀疤崾尽縿?dòng)詞-ing形式短語(yǔ)做結(jié)果狀語(yǔ)時(shí)常用逗號(hào)與主句隔開,表示與主句的動(dòng)作之間有必然的因果關(guān)系,有時(shí)在其前加副詞thus;動(dòng)詞不定式做結(jié)果狀語(yǔ)往往表示出乎意料的結(jié)果或不好的結(jié)果,而且不定式前常加only。7.【教材原句】Therefore,thereisstillalongwaytofindasuitablesolutionthatputssufficientfoodonthedinnertablewhilekeepingpeopleandtheenvironmentashealthyaspossible.因此,想要找到一個(gè)合適的解決方案,使人類和環(huán)境盡可能保持健康,又讓人們有足夠的食物可吃,這還有很長(zhǎng)的路要走?！揪涫狡饰觥勘揪涫且粋€(gè)復(fù)合句。thereisstillalongway...是主句,thatputs...是定語(yǔ)從句,whilekeeping是省略的時(shí)間狀語(yǔ)從句。as...aspossible盡可能……。【句式拓展】as...aspossible相當(dāng)于as...asonecan,使用時(shí)需要注意can的變化。e.g.Youshouldreadmoreandmorebooksascarefullyasyoucan!Beforewriting3Writeanargumentativeessaygivingyouropiniononchemicalororganicfarming.Discussthesequestionsingroups.Istheauthorofthepassagefororagainstorganicfarming?Howdoyouknow?Whatotherdisadvantagesofchemicalfarmingdidtheauthornotlist?Howmightthefollowingitemsbeproblemsandhowimportantaretheyfororganicfarming?naturalanimalwasteusedasfertiliserhighercostofproducingfoodgreatereffortrequiredtofarmWhatotherdisadvantagesoforganicfarmingcanyouthinkof?寫作指導(dǎo)辯論報(bào)告屬于應(yīng)用文文體之一，同時(shí)又具有議論文的特點(diǎn)，是對(duì)某個(gè)話題的辯論。該類文章一般分為三部分：第一部分：開門見(jiàn)山，說(shuō)明自己的看法或觀點(diǎn)；第二部分：列舉支持方的觀點(diǎn)及其理由；或列舉反對(duì)方的觀點(diǎn)及其理由；第三部分：得出結(jié)論或給出自己的觀點(diǎn)。辯論報(bào)告[文體特征]1.文章短小精悍，語(yǔ)言精練，準(zhǔn)確易懂；2.時(shí)態(tài)常用一般現(xiàn)在時(shí)。[常用表達(dá)]1.Wehadadiscussionabout...2.I’mwritingtotellyouaboutadiscussionwehavehadadiscussionabout...3.Opinionsaredividedonthisissue./Opinionsaremainlydividedintotwogroups.4.Differentpeople,however,havedifferentopinionsonthismatter.5.Peoplewhoareagainsttheideathinkthat...WhilewritingDecidewhetheryourgroupsupportschemicalfarmingororganicfarming.Comeupwiththreemainpointstosupportyouropinion,andthenaddatleastonedetailtosupporteachmainpoint.Completetheoutlinebelow.Topicsentence:Inmyopinion,_______farmingispreferableto____________farmingbecause____________________________Point1:_________________________________________

(Detail)____________________________________Point2:_________________________________________

(Detail)____________________________________Point3:_________________________________________

(Detail)____________________________________Conclusion:______________________________________Useyouroutlinetowriteashortessaygivingyouropiniononthetopic.Writeanargumentativeessay

明確體裁話題確定時(shí)態(tài)人稱

布局文章架構(gòu)

列出核心要點(diǎn)

開頭：介紹農(nóng)業(yè)發(fā)展概況和有機(jī)農(nóng)業(yè)的出現(xiàn)。中段：展開論述，分層次介紹化學(xué)農(nóng)業(yè)和有機(jī)農(nóng)業(yè)的區(qū)別，有機(jī)農(nóng)業(yè)的優(yōu)勢(shì)。結(jié)尾：總結(jié)觀點(diǎn)，提出建議。支持有機(jī)農(nóng)業(yè)文體：議論文以現(xiàn)在時(shí)為主、兼顧過(guò)去時(shí)、將來(lái)時(shí)；第一、三人稱1.化學(xué)農(nóng)業(yè)的缺點(diǎn)。2.有機(jī)農(nóng)業(yè)的優(yōu)點(diǎn)，人們對(duì)健康的重視和選擇有機(jī)農(nóng)業(yè)的理由。4Exchangeyourdraftwithapartner.

Doesthewriterdoagoodjobofexpressinghis/heropinion?Doeseachparagraphhaveonemainidea?Doeseachparagraphhaveatleastonedetailtosupportitsmainidea?Doesthewritersequencethepointsinalogicalorder?Doesthewriterdoagoodjobpersuadingyoutoaccepthis/heropinion?1.Usethechecklisttohelpyoureviewyourpartner’sdraft.

2.Takeyourdraftbackandreviseit.Sample

Writing

Inmyopinion,organicfarmingispreferabletochemicalfarmingbecauseofthebenefitstotheenvironmentandtopeople,andbecauseorganicfoodismorenutritious.

Tobeginwith,chemicalfarmingharmstheenvironment.Sincechemicalpesticidesarenotfoundinnature,normalnaturalprocessescannotgetridofthem.Instead,thechemicalstendtoaccumulateinthesoilandwater,andareabsorbedinthefoodchain,wheretheypoisonwildlifeanddomesticanimals.Thisaffectsusdirectly,becauseweendupeatingplants,dairyproducts,eggs,andmeatthathavehighlevelsofpesticides.Thinkaboutit:Thepurposeofthepesticidesistokill“pests”,thatis,tokillinsects.Somethingthatcankillaninsectprobablyisnothealthyforapersontoeat.Whileitmaybetruethatthefoodwe