人教版英語必修4unit2Using language市公開課一等獎省名師優(yōu)質(zhì)課賽課一等獎?wù)n件

人教課標(biāo)版高一必修4Unit2英語課件ReadingonP14Whatisthesubstanceweputonthesoilwhichmakescropsgrow?Itisfertilizer.Howmanykindsoffertilizersdofarmersuse?Therearetwokinds.Theyarechemicalfertilizersandnaturalones.Whichkinddofarmersusewhentheyaredoingorganicfarming?Doyouknowaboutorganicfarming?ORGANICFARMING

Organicfarmingissimplyfarmingwithoutusinganychemicals.1.Whyarechemicalfertilizerssopopularinfarmingtoday?I.Readthepassageandanswerthefollowingquestions.Theyareagreatwaytostopcropdiseaseandincreaseproduction.Comprehending2.Whatproblemscanbecausedbyusingchemicalfertilizers?Theycandamagethelandbykillinghelpfulbacteriaandpestsandbystayinginthegroundandundergroundwaterforalongtime.Theydamagepeople’shealthbybuildingupintheirbodiesandleadingtocancerorotherillnesses.3.Whatisorganicfarming?Organicfarmingmeansgrowingcropswithoutusinganychemicals.4.Whatisthemainreasonforusingorganicfarmingmethods?Themainreasonforusingorganicfarmingmethodsistogrowgoodfoodandtoavoiddamagingtheenvironmentorpeople’shealth.II.Readthetextagainandfillintheblanks.ChemicalFarmingAdvantagesStoppingcropdiseaseandincrease__________productionChemicalFarmingDisadvantagesDamagingtheland:killingthehelpful________________Damagingpeople’shealth:◆Manychemicalsinthefoodsupplycanleadtocancerorotherillnesses.◆Foodgrowstoofasttobefullofmuch________.bacteriaandpestsnutritionOrganicfarming____Togrowgoodfoodandavoiddamagingtheenvironmentorpeople’shealthGoalOrganicfarmingMethods◆Using_______wastefromanimalsasfertilizer◆Changing______________ineachfieldeveryfewyears◆Using_____________ofsoiltoplantcrops◆Planting_____betweencropsgrassnaturalthekindofcropdifferentlevelsInwhatconditiondoyouthinkgreenfoodgrow?Theadvantagesofgreenfooddirtyairdirtywatersuppliesinindustrialareasmanychemicalfertilizersclean,freshaircleanwatersuppliesawayfromindustrialareasfreeofchemicalfertilizersMainideaofthepassageChemicalfertilizerscancausemanyproblems,soorganicfarmingisbecomingmorepopular.ORGANICFARMINGStructureofthetextIusingchemicalfertilizersforalongtimecanhurtthelandandalsopeople’shealthIIProblemcausedbychemicalfertilizers1.Damagethelandbykillingthehelpfulbacteriaandpestsaswellastheharmfulones2.Leadtocancerorotherillness.3.Foodgrownwithchemicalfertilizerslookbeautiful,butinsidethereisusuallymorewaterthanvitaminsandminerals.ⅢOrganicfarmingisbecomingmorepopularwithsomefarmersandmanycustomersafterthesediscoveriescameout.IVOthermethodstokeepthesoilfertile.ProjectPersuadethefarmersinourcountytogrowthecropsbyorganicfarmingwiththeknowledgelearnt.Whatisorganicfarming?Whatfertilizershouldtheyuse?Why?Howtoplantthedifferentcrops?……Languagepoints1.leadto使用方法[寓詞于境]閱讀以下句子，注意leadto意思和使用方法。1.Hiscarelessnessledtotheaccident.2.Thistestisobviouslybadbecauseitleads toincorrectlearning.3.Toomuchworkandtoolittlerestoften leadstoillness.[自我歸納]leadto意為“_________________”,后多跟名詞或代詞。造成、造成(后果)[聯(lián)想]resultin引發(fā)(某種結(jié)果)、使取得(某種結(jié)果)、結(jié)果……。如：Theaccidentresultedintwodeaths.resultfrom由……造成、因……而產(chǎn)生。如：Sicknesssometimesresultsfromeatingtoomuch.[即學(xué)即練]用leadto適當(dāng)形式完成句子。1.Studentsshouldalwaysrememberthathard workisthemainwaywhich______success.2.Thebadweather_____aterribleaccidenta fewdaysago.ledtoleadsto2.focus使用方法[猜一猜]依據(jù)語境推斷focus在以下句子中含義,并從a-d中找出與每句話中focus相符合英文釋義。1.Thefocusofthemeetingchangedfrompopulationgrowthtotheeducationofwomen.2.Bringtheobjectintofocusifyouwantaclearphotograph.3.Shetriedtofocushermindonherwork.4.SheturnedthecameraandfocusedonMartin’sface.a.thething,person,situation,etc.thatpeoplepayspecialattentiontob.apointordistanceatwhichtheoutlineofanobjectisclearlyseenbytheeyeorthroughalensc.topointacameraatsomething,andchangethecontrolsslightlysothatyoucanseethatthingclearlyd.togivespecialattentiontooneparticularpersonorthing,ortomakepeopledothisc

abd[歸納總結(jié)]focus作名詞,意為“焦點(diǎn)、中心點(diǎn)”;作動詞,意為“集中、聚焦”,常組成短語focuson,意為“集中(注意力、精力等)于”。[即學(xué)即練]翻譯以下句子。1.Becauseofhisstrangeclothes,he immediatelybecamethefocusof attentionwhenheenteredtheoffice.因?yàn)樗嫜b異服,所以一走進(jìn)辦公室他便成了大家注意焦點(diǎn)。2.Focusyourcameraonthosetrees.3.I’msotiredthatIcan’tfocusonanythingtoday.把攝影機(jī)焦點(diǎn)集中在那些樹上。今天我太累了,精神集中不起來。3.keep…freefrom“遠(yuǎn)離”或“防止”keepfreefromemotionalreactions

防止激動反應(yīng)

keepfreefromrestrictions

防止受到限制

4.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.[分析]①本句結(jié)構(gòu)比較復(fù)雜。其主干結(jié)構(gòu)為:主句(Cropsputimportantmineralsbackintothesoil)+狀語(makingitreadyforcrops)。②狀語中又包含“make+it+形容詞”結(jié)構(gòu)和由that引導(dǎo)定語從句(thatneedrichandfertilesoil)。5.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.[分析]①本句主干結(jié)構(gòu)是一個簡單句,其結(jié)構(gòu)是:主語(farmers)+謂語(prefer)+并列賓語(planting...+leaving...)。②其中betweencrops和intheground作地點(diǎn)狀語。③兩個賓語后面又分別帶有一個不定式作目狀語（topreventwindorwaterfromcarryingawaythesoil和tobecomeanaturalfertilizerforthenextyear’scrop）。ExercisesI.依據(jù)以下各句句意及所給單詞首字母或漢語提醒，寫出所缺單詞正確形式。1.Thenewmodelwillgointop________nextyear.2.Becauseofhispoorn_______,hehasgrownweakerandweaker.nutrition production3.Thosecountriesarerichin_______(礦物)resources.4.Newscientificd_________arebeingmadeeveryday.5.Thegroupproducesamonthly________(摘要)oftheirresearch.summarymineraldiscoveriesII.用適當(dāng)介詞填空。