人教版高一英语必修四Unit2Usinglanguag.ppt

Unit2WorkingthelandUsinglanguage chemicalproductionbacteriapestnutritionmineraldiscovery adj 化学的 关于化学的n 生产 制造n 细菌n 害虫 害兽 害鸟n 营养 滋养 食物n 矿物 矿石n 发现 发觉 focussoilreducerootskimunderlinesummarycomment n 焦点 中心点vt 集中 聚焦n 土壤vt 减少 减缩n 根 根源vt 浏览 略读vt 画底线标出 强调n 总结 摘要 概要n 评论 议论vi 做出评论 buildupleadtofocusonkeep freefrom of 逐渐增强 建立 开发导致 造成 后果 集中 注意力 精力等 于使 免受 影响 伤害等 使 不含 有害物 Itisfertilizer Whatisthesubstanceweputonthesoiltomakecropsgrow Howmanykindsoffertilizersdofarmersuse Therearetwokinds Theyarechemicalfertilizersandnaturalones OrganicFarming chemicalfertilizer cowdung 用化学肥料和有机肥料的区别 Reading CHEMICALORORGANICFARMING Chemicalfertilizerscancausemanyproblems soorganicfarmingisbecomingmorepopular Organicfarmingmeansgrowingcropswithnaturalfertilizer Theorganicfarmerskeepthesoilrichandhealthy Themainideaofthetext FastReading Long termuseofchemicalfertilizerscancausedamagetothelandandpeople shealth Problemscausedbychemicalfertilizers Themainideaofeachparagraph P1 P2 Farmersandcustomersturntoorganicfarming Othermethodstokeepthesoilfertile P3 P4 Chemicalfertilizer Notgoodforthesoilorthewatersupply Thesoilgetsexhausted Killbothhelpfulandharmfulbacteriaandpests CarefulReading Chemicalfarming stopcropdiseaseincreaseproduction damagetheland bykilling affectcrops bystaying leadtocancer illnesses bybuildingup havelessnutrition bygrowingtoofast Organicfarming Naturalwastefromanimals Makethesoilricherinmineralsandmorefertile Ahealthysoil Reducediseasesincrops Helpcropsgrowstrongandhealthy Organicfarming usenaturalwaste makethesoilrichinminerals changethecrop putmineralsbackintosoil making plantcropswithdifferentroots usedifferentlevelsofland plantgrassbetweencrops prevent from anaturalfertilizer Othermethods Changecropseverytwoorthreeyears Corn wheat Peas soybeans Putthemineralsbackintothesoil makingitrichandhealthy Cropsthatusethesurfaceofthesoil peanuts Cropsthatneedadeeperlevelofsoil rootvegetable Makesurethatwhatisleftinthegroundafterharvestingbecomesanaturalfertilizerforthenextyear scrop 1 WhichstatementisWRONGaccordingtothetext A Allcropsareorganic B Recently theterm organicfarming hasgainedanothermeaning C Allfarmersusefertilizers D Scientistsbelievesomechemicalfertilizersarebetterforpeople Choosethebestanswer D 2 Whichisnotthereasonwhyorganicfarmersprefernaturalwastefromanimals A Itcankeepthefoodfreefromchemicals B Itcankeeptheair soilandwaterfreefromchemicals C Itcankillharmfulpests D Itcanmakethesoilricherinmineral C 3 Whatistheadvantageofusingchemicalfertilizers A Leavingchemicalsinthegroundforalongtimeisgoodforwatersupply B Theycangetthesoilexhausted C Theycankillhelpfulbacteria D Theycankillharmfulpest D 4 Theorganicfarmersdothefollowingsexcept A addingfertilizerswhichisrichinmineralB changingcropseverytwoorthreeyearsC plantingseedsindifferentlayersofthesoilD plantinggrassbetweencropstopreventthesoilfrombeingblownaway A 1 Whatis organicfarming Answerthequestions Itreferstocropsgrowingwithnaturalratherthanchemicalfertilizers 2 Whatdoorganicfarmersprefertouseasfertilizer Thefertilizerthatorganicfarmerspreferisnaturalwastefromanimals Farmersgrowpeasorsoybeansaftercornorwheatsothatpeasandbeanscanputmineralsbackintothesoil makingitrichandhealthyandreadytogrowmorewheatorcorn 3 Whydoorganicfarmersgrowpeasorsoybeansaftercornorwheat 4 Whatistheadvantageofusingnaturalfertilizer Makethesoilricherinmineralsandsomorefertile Reducediseasesincropsandhelpthemgrowstrongandhealthy Besides keeptheair soilandwateraswellasthefoodsupplyfreefromchemical Theyareagreatwaytostopcropdiseaseandincreaseproduction 5 Whyarechemicalfertilizerssopopularinfarmingtoday 6 Whatproblemsarecausedbyusingchemicalfertilizers Therearethreeproblems First chemicalfertilizersaffectthesoilandthewatersupplybadly Second theyallowfarmerstogrowthesamecropyearafteryearandexhaustthesoil Third theykillbothhelpfulandharmfulpests 7 Whatisthemainreasonforusingorganicfarmingmethods Themainreasonforusingorganicfarmingmethodsistogrowgoodfoodandtoavoiddamagingtheenvironmentorpeople shealth Fillinthechart Farmersoftenchangethekindofcropineachfieldeveryfewyears Changingthecropsrenewsthemineralsinthesoilandhelpsitbecomerichandhealthy Thisusesdifferentlevelsofsoil Thispreventswindorwaterfromcarryingawaysoilandactsasanaturalfertilizer Itisimportanttoexplainthisagainorwewillconfusethestudents confuse动词 表示 把 某人 弄糊涂 使迷惑 搞乱 混淆 如 Theyaskedmesomanyquestionsthattheyconfusedme 他们问我那么多问题把我都弄糊涂了 LanguagePoints MyChineseandEnglishbooksareconfusedtogether 我的中英文的书籍混在一起了 Hewasconfusedbyastrangeidea 他被奇怪的念头弄糊涂了 Pleasedon tconfuseAustraliawithAustria 别把澳大利亚和奥地利混淆了 拓展 confusionn 混乱 慌乱 混淆confusing和confused辨析 这两个词都是由confuse转化而来的形容词 confusing意思是 莫名其妙的 难以理解的 difficulttounderstand puzzling 强调事物本身所具有的性质 confused意思是 糊涂的 迷乱的 unabletothinkclearly 强调人对某事物的感受 2 Hisfathersaysthathehasneverregrettedsendinghissontostudyabroad Page13 regret在句中作动词 意为 为 感到遗憾 后悔 惋惜 如 Ididn tregretthechoiceIhadmade 我做了这个选择并不后悔 Iregrettosaythatwecan tstayhereanylonger 我很遗憾 我们不能再在这儿多呆了 Sheregrettedhavingmissedthefilm 她懊悔没能看上那场电影 拓展 1 regret还可用作名词 意为 遗憾 后悔 Ifeltagreatregretathavingspentmytimeinthisway 我对这样浪费光阴深感懊悔 2 regrettodosth表示 遗憾地要 后面的动词常是say tell speak inform等 regretdoingsth表示 后悔做过 toone sregret令人遗憾的是 3 Thesechemicalsinthefoodsupplybuildupinpeople sbodiesovertime buildup增强 建立 开发Hardworkingconditionsbuildupcharacter 艰苦的工作条件能磨练人的性格 4 Manyofthesechemicalscanleadtocancerorotherillnesses leadto 导致 造成Toomuchworkandtoolittlerestoftenleadtoillness 过量的工作和过少的休息会引起疾病 AllroadsleadtoRome 条条大道通罗马 5 Theyfocusonkeepingtheirsoilrichandfreeofdisease focuson 集中 注意力 精力等 于Youshouldfocusyourattentiononyourwork 把注意力集中在你的工作上 Olympus Focusonlife 奥林巴斯 瞄准生活 6 reducev 减少 降低e g 公司尽力通过减少花销来提高利润 Thecompanytriestoincreaseprofitsby 今年我们已经减少了业务开支 We expensesthisyear reducingcosts havereduced 7 Thisalsokeepstheair soil waterandcropsfreefromchemicals keeps freefrom of 使 免受 影响 伤害等 使不含 有害物 Weputourbooksinbookcasetokeepthemfreefromdust Youmusttakecaretokeepthewoundfreefromthedirt 拓展 1 keep from 隐瞒 不把 告诉 某人 阻止 避免 如 Hewon tbeabletokeepthetruthfromhisfather Youcan tkeephimfromdoingthatthing 2 freefrom 使解除 使摆脱如 Theyaimtofreethestudentsfromtoomuchhomework 3 befreeofsb sth 摆脱某人 某物I mfreeofthatjobatlast Expressions 1 化肥2 对 造成损害3 洗掉某物4 导致 造成 后果 通往5 逐渐增强 建立6 另外 还有 7 使 免受 影响 8 集中 注意力 精力 于9 每隔几年10 避免做 chemicalfertilizerscause dodamagetowashoffleadtobulidupinaddition to keep freefrom offocusoneveryfewyearsavoiddoing Exercises cause dodamageto washoff leadto bulidup inaddition to keep freefrom of focuson avoiddoing 1 Hismistakes hisfailure 2 Thesechemicalsinthefoodsupply inpeople sbodiesovertime 3 Allroads Rome 4 Please yourmind thefollowingproblem 5 Childrenshould violence ledto bulidup focus on leadto bekeptfreefrom 6 Helikesbasketball helikesfootball Helikesbasketball football 7 LittleTomstuckto themud hisshoesbyhimselfbeforehecamein 8 Itriedto meet himbecausehealwaysboresme 9 ThestormonMay3 great peopleinBurmasofar cause dodamageto washoff leadto bulidup inaddition to keep freefrom of focuson avoiddoing Inaddition inadditionto washing off avoidmeeting hascaused damageto Thepossiblebadeffectsofchemicalfertilizersonthefruitandvegetablesthatweeattoday 1Asyoulistentothisdialogue keepinmindwhatyouhavejustreadaboutchemicalfertilizers Whatisthemaintopicoftheconversation Listening 1 PaulthinksthatCarrieisnottellinghimthetruth 2 Usingchemicalfertilizersalwaysmakesvegetablesemptyinside True False 2Listentothedialogueasecondtime Decideifthefollowingstatementsaretrueorfalse accordingtotheconversation Giveyourreasons 3 Today sfruitisnotashealthyforpeopleasfruitfiftyyearsago 4 Eatingmorevegetablesmightnotalwaysbegoodforus 5 Alloftoday svegetableslookhealthybutinfactarenot False True True WHAT SWRONGWITHTHEVEGETABLES Girl Hey Paul listentothis amagazinearticleaboutafarmerwhousedtoomuchchemicalfertilizeronhisfields Whenhisvegetableswerepicked theywereallfoundtobeempty Listeningtext BOY Empty You rejoking Carrie thatcan tbetrue Girl Ididn tbelieveiteither Thisarticlesaysthiscanhappensometimeswithvegetableslikecucumbers carrotsandpumpkins Thischemicalfertilizermakesthevegetablesgrowfasttolookbigandbeautiful butthey reemptyinside BOY Youknow I venoticedthatsometimesmymumbuyscarrotsfromthesupermarketthathavebigholesdownthecenter Iguessthatmustbefromusingchemicalfertilizers GIRL Yeah that swhatthemagazinesays Themainpointofthearticle though isn taboutholesinourvegetables It stalkingaboutwhythefruitandvegetablesweeattodayaren tasnutritiousastheonesourgrandparentsate BOY What Mymumisalwaystellingmetoeatmorevegetables becausethey regoodforme GIRL Yeah Iknow mymothersaysthatsamething Andit strue theyaregoodforus buttheproblemisthattheyaren thealthyenough Allthesechemicalfertilizers theykilloffboththebadandthegoodthingsintheground Thegrounddoesn thaveenoughvitaminsandmineralsanymoretohelpcropsgrowhealthy BOY So ifourfruitandvegetablesweregrownwithchemicalfertilizers theymightlookhealthy butprobablyaren treallyhealthy Iguesswe vegottostopusingsomanychemicalfertilizerstogrowourfood F FarmerC CustomerF Goodmorning Wouldyoulikesomeorganiccarrotsthismorning C Hmm They realittleexpensive Whatistheadvantageof Reading Speakingandwriting Sampledialogue F Theadvantageofthesevegetablesisthattheyaregreenfoodsotheyaresafetoeatandgoodforyourfamily C Butwhatistheadvantageofhavinggreenfood Iknowallvegetablesaregoodforyouandthosedowntheroadlookgreentoo AndIcanbuythemathalfpricethere F Well letmeexplain I dratherfeedmyfamilyongreenfoodthanothervegetablesbecausetheyaregrownwithoutchemicalfertilizers C Butthepriceistooexpensive I dprefertobuygoodfoodifIcanaffordit F Thisisgoodvalueformoneybecauseyou llhavehealthierchildren Theywon thavetogotothedoctorsooftenandyouwon thavetotaketimeoffwork Inthelongrunyou llbebenefit C CertainlyI dliketobuywhatissafeandhealthy PerhapsI lltrysomeofyourvegetablesandiftheyareasgoodasyousay I llbebacknextweek Writing BuythebestfruitshereWeonlysellgreenfoodinthisshop Bestchoiceatbestprice Safe healthy clean fresh Farawayfromanypollution Mainheading Thisexplainsthatyousellgreenfood 1 Nochemicalfertilizer allorganicfertilizers2 Cleanair cleanwater3 Nopoison nopesticides4 Homeinheaven Reasonstobuy Healthyfoodmeanshealthylife Farawayfromdiseases withoutworries fullofhappiness onereason Whyitisgoodvalue SomeEnglishfarmingproverbs Hewhodoesnotriseearlyneverdoesagoodday swork 起床不早 一天的工作干不好 Gotobedwiththelambandrisewiththelark 随羔羊就寝 与云雀同起 Abarley cornisbetterthanadiamondtoacock 对一只公鸡来说 一颗麦粒优于一颗钻石 ThecuckoocomesinApril andstaysthemonthofMay singsasongatMidsummer andthengoesaway 布谷鸟 四月来 五月一直在 仲夏唱歌 然后就离开 Alwaystakeoutthemeal tub andneverputtingin sooncomestothebottom 取粮不储粮 桶底粮光光 Nomill nomeal 不磨面就没有饭吃 Sownothing reapnothing 春不播 秋不收 Homework 1 Writeasummaryoftheadvantagesoforganicfarmingandthedisadvantagesofchemicalfarming 2 Collectsomeinformationaboutthesafetyandimportanceofgreenfood