chemicalororganicfarming公開課新的資料第1頁/共27頁First,buyorselecttheseedsfromtheshop.Theprocessoffarmingshop第2頁/共27頁Second,plow（犁田）orturnoverthesoil.第3頁/共27頁Third,sowtheseedsinthesoil.第4頁/共27頁Finally,harvestourgrain.

第5頁/共27頁toincreaseproductionofthe

crops

fertilizers第6頁/共27頁fertilizer

Howmanykindsoffertilizersdoyouknow?

chemicalfertilizers

natural

fertilizers第7頁/共27頁chemicalfarmingorganicfarmingchemicalfertilizers

natural

fertilizersBetter？第8頁/共27頁ChemicalOrOrganicFarming?第9頁/共27頁EffectsofchemicalfertilizerProblemscausedbychemicalfertilizers.P1.P2.Farmersandcustomersturntoorganicfarming.(advantages)Othermethodstokeepthesoilfertile.

P3.P4.Task1.Skimming

forthemainidea第10頁/共27頁Skimming:readthepassagequicklytogetageneralideaYoucangetitfromthefirst,thelastparagraphandalsotopicsentence

Readingskill:第11頁/共27頁EffectsofchemicalfertilizerProblemscausedbychemicalfertilizers.P1.P2.Farmersandcustomersturntoorganicfarming.(advantages)Othermethodstokeepthesoilfertile.

P3.P4.Task1.Skimming

forthemainidea第12頁/共27頁Whyarechemicalfertilizerssopopularinfarmingtoday?

2.Whatproblemscanbecausedbyusingchemicalfertilizers?3.Whatisorganicfarming?4.Whatisthepurposeofusingorganicfarmingmethods？Task2Scanning第13頁/共27頁Scanning:skip(跳讀)thepassagequicklytofindthedetailsorspecificinformationReadingskill:第14頁/共27頁Whyarechemicalfertilizerssopopularinfarmingtoday?

2.Whatproblemscanbecausedbyusingchemicalfertilizers?3.Whatisorganicfarming?4.Whatisthepurposeofusingorganicfarmingmethods？Task2ScanningBecausetheycanstopcropdiseaseandincreaseproduction.First,theycandamagethelandbykillingthehelpfulbacteriaandpests.Theyalso

stayintheground,buildupinpeople’sbodiesandleadtocancerorotherillnesses.Inaddition,itusuallygrowstoofasttobefullofnutrition.Organicfarmingisfarmingwithoutusinganychemicals.Togrowgoodfoodandtoavoiddamagingtheenvironmentorpeople’shealth.第15頁/共27頁Para1TopicPara2ProblemsPara3AdvantagesPara4Methodsillustration（闡明）comparisonconclusionThetypeofthearticleis_____________Exposition（說明文）Thestructureofthispassage第16頁/共27頁請以“PlasticorClothbags?”為題模仿這篇文章的篇章結(jié)構(gòu)和句子結(jié)構(gòu)去寫一篇說明文。使用塑料袋的害處有：1.“白色污染”的主要來源；2.不可回收再利用；3.燃燒污染空氣；4.污染土壤和地下水。

使用環(huán)保袋的好處有：1.可以大量減少塑料袋的使用；

2.使用壽命比紙袋長；

3.可以循環(huán)利用；

4.價格低廉，易于推廣。

writing第17頁/共27頁Part1:

Briefintroductionofthepresentsituation.(Effects)part2:

Theproblemscausedbyusingplasticbags.Part3:

Theadvantagesofusingclothbags.

Howmanypartsarethereinyourcomposition?Whatdoeseachparttalkabout?TipsHaveadiscussioninpairswhattowritePart4:

Conclusion.PlasticOrClothBags?Pre-writing第18頁/共27頁5-stepThemethodofwriting

Step1:

choosetherighttense(時態(tài))_________________________

Step2:

keywords(關(guān)鍵詞)____________

Step3:

putwordsintosentence(連詞成句）

Step4:

putsentencesintoarticle（連句成文）

Step5:correcting(檢查校對）past/

present/future

?Someconjunctions(連詞）:

whitepollution,recycle,reuse…h(huán)owtowriteFirstofall,firstly,secondly,what’smore,inaddition,notonly…butalso,foronething,foranother,ontheonehand,ontheotherhand,lastbutnotleast,inmyopinion,asfarasIamconcerned,Pre-writing第19頁/共27頁

Overthepasthalfcentury,…h(huán)avebecomeverycommon…,…welcomethemasa..wayto….Recently,however,wehavebeenfindingthattheycancausedamageto…,even…topeople’health.Whataresomeoftheproblemcausedby..?Firstofall,…what’smore/inaddition,

…Lastbutnotleast

…Withthesediscoveries,…arebeginningtoturningto….Foronething..Foranother,…/

ontheonehand,…ontheotherhand,…Allinall,/Inmyopinion,/

AsfarasIamconcerned,let’swelcome…andsaynoto…While-writing第20頁/共27頁ChallengeyourselfPrepareacomposition“PlasticOrClothBags?”While-writing第21頁/共27頁使用塑料袋的害處有：1.“白色污染”的主要來源；2.不可回收再利用；3.污染空氣，土壤，地下水

使用環(huán)保袋的好處有：1.大量減少塑料袋的使用；2.使用壽命比紙袋長；3.可以循環(huán)利用；4.價格低廉，易于推廣。

“PlasticOrClothBags?”

Overthepasthalfcentury,…h(huán)avebecomeverycommonWhataresomeoftheproblemcausedby..?Firstofall,…secondly,

what’smore/inaddition,

…

Withthesediscoveries.,…arebeginningtoturningto….Foronething,..Foranother,/

ontheonehand,…ontheotherhand,…Lastbutnotleast..Inmyopinion,/

AsfarasIamconcerned,let’swelcome…andsaynoto第22頁/共27頁greenfoodorganicfoodWhatcanwelearnfromthelesson?Healthylife

第23頁/共27頁HomeworkReadthetextmorecarefullyafterclass,andunderlinesomeusefullanguagepoints.Finishthewriting.第24頁/共27頁Thankyou!Goodbye第25頁/共27頁Thefollowingwordsmayhelpyou.

Overthepasthalfcentury,…h(huán)avebecomeverycommon…,…welcomethemasa..wayto….Recently,however,wehavebeenfindingth