高中英语必修四unit2-Using-language-课件.pptx

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1、人教版Book4Unit2Workingtheland(Reading,Speaking&Writing)UsinglanguageVSStep1Lead-inbigandbeautifulfresher,healthier,tastebettertoimprovetheoutputofthecropsfertilizerherbicidepesticidenaturalfertilizerfromanimalwastechemicalfertilizerHowmanykindsoffertili

2、zersdofarmersuse?Whichkinddofarmersusewhentheyaredoingorganicfarming?ChemicalfertilizersgreenfoodorganicfoodChemicalorOrganicFarming?ReadingD.Long-termuseofchemicalfertilizerscancausedamagetothelandandpeople’shealth.B.Farmersandcustomersturntoorganicf

3、arming.C.Othermethodstokeepthesoilfertile.Step2Reading4mA.Problemscausedbychemicalfertilizers.Task1Skimthepassageandmatchthemainideawitheachparagraph.P1.P2.P3.P4.Themainideaofthispassage:________________cancause_____________,so________________isbecomi

4、ngmorepopular.chemicalfertilizersmanyproblemsorganicfarming1.Whyarechemicalfertilizerssopopularinfarmingtoday?2.Whatproblemscanbecausedbyusingchemicalfertilizers?3.Whatisorganicfarming?Andwhataretheadvantagesoforganicfarming?4.Whatmethodsdotheorganicf

5、armersusetokeepthesoilfertile?Task2Readthepassagecarefullyandanswerthefollowingquestions1.Whyarechemicalfertilizerssopopularinfarmingtoday?Manyfarmerswelcomedthemasagreatwaytostopcropdiseaseandincreaseproduction.Paragraph1Chemicalfertilizerdamagethela

6、ndorthewatersupplydamagepeople’shealthGrowtoofasttobefullofnutrition2.Whatproblemscanbecausedbyusingchemicalfertilizers?Whatproblemscanbecausedbyusingchemicalfertilizers?Therearethreeproblems.First,theycandamage…aswellas….Theyalsostayinthe…and….Inaddi

7、tion,…growtoofastto….first;second;finally;lastbutnotleast,etc.Para2Therearethreeproblems.First,theycandamage…aswellas….Theyalsostayinthe…and….Inaddition,…growtoofastto….Tips:connectives（过渡词）andtransitionalphrases（过渡词）fordevelopmentParagraph2advantages

8、3.Whatisorganicfarming?Whataretheadvantagesoforganicfarming?MakethesoilricherinmineralsandmorefertileHelpcropsgrowstrongandhealthykeeptheair,soil,waterandcropsfreefromchemicals.(Environment-friendly)Paragraph3Farmingwithoutusinganychemicals.It