冀教版八年级下册Lesson8WhyArePlantsImportant课件

Unit2PlantaPlant,Lesson8WhyArePlantsImportant?,Words,soiln.土，土壤,shaden.树荫,pleasantadj.使人愉快的fulfillv.达到；执行basicadj.基本的；基础的,Questions,Whatwouldhappenwithoutfood?Whatkindofthingscantrees（plants）do?,Inpairs,Readthetextandanswertothefollowingquestions,LanguagePoints,1.Treeshelpcleantheair.树能帮着清洁空气。helpvt.帮助，常用于两个句型：helpsb.(to)dosth.=helpsb.withsth.“帮助某人做某事”。介词with后接名词，通常不接动词-ing形式。Mr.WuhelpsmelearnEnglish.=Mr.WuoftenhelpsmewithmyEnglish.吴先生帮我学英语。,2.Thenwecansitintheshadeunderatree.,intheshade,“在阴凉处”,类似短语,inthesuninthelight,在阳光下在灯光下,3.Donutsdontgrowontrees!,ontrees“在树上”,onthetree,树本身的东西，长在树上。,inthetree,外来的东西，不是树本身的东西,e.g.树上有几只鸟.,Therearesomebirdsinthetree.,树上有很多苹果.,Therearemanyapplesonthetree.,看!风筝在树上.,Look!Thekiteisinthetree.,4.Thetreesandplantstakeenergyfromthesunandturnitintofood.,turninto,“把转化”,e.g.我们可以把树制成纸.,Wecanturnthetreeintopaper.,takeenergyfrom“从中获取能量”,5.Medicineandclothingarealsomadefromtreesandplants.与make有关的被动语态的短语,bemadefrom,由(看不出原料)制成,bemadeof,由(看出原料)制成,bemadeby,被(某人)制造,bemadein,在(某地)制造,6.Wecantlivewithoutplants,without,介词“没有”,e.g.他没有吃早饭就去上学了.,Hewenttoschoolwithoutbreakfast.,没有水鱼就不能活.,Fishcantlivewithoutwater.,Whyareplantsimportant?Treeshelp_theair.Trees_usfood.Wecan_thingswithtrees.Wecan_underatree.We_booksfromtrees.Manyanimals_intrees.,clean,give,build,sit,make,live,Exercise,Allplantstakeenergy_thesunandturnit_food.A.to;fromB.into;toC.from;toD.from;into,2.Plantscanhelp_theair.A.tocleanB.cleaningC.cleanD.ofcleaning,3.Wine_wheat.A.ismadefromB.ismadeofC.ismadebyD.ismadein,4.Iwouldfail_yourhelp.A.inB.withC.withinD.without,Whydoweneedplants?Findsomeanswerstothisquestion.Writedownyouranswers.,letsdoit!,Peopleuseplantsinmanyways,ForfoodThereareabouteightythousanddifferentplantsintheworldthatpeoplecaneat.Buthalfoftheworldsfoodcomesfromonlythreeplants:rice,cornandwheat.,Formedicine,Wemakemanymedicinefromplants.Whatsmedicine?Doctorsusemedicinetohelpsickpeople.,Forshelter,Weusewoodfromtreestobuildhousesandfurniture.Tables,chairsandbedsarefurniture.Soisyourdesk.Manyanimalsliveintheforest.,Forclothing,Isyourshirtmadeofcotton?Cottonismadefromthecottonplant.Doyouhaveahatmadeofstraw?Strawhatsaremadefromthestemsofgrassplants.,Forthingsweusetowork,Lookatthethingsonyourdesk.Books,paper,pencils,erasersandtheinkinyourpenallcomefromplants.,Plantshelpmaketheaircleanandfresh.Theplantscoverthesoilandcanstopthedust.,Forenvironment,Summarize,theimportanceoftreesorplants,Treesareveryimportanttopeople1.Treesandotherplantshelpcleantheair.2.Treesandplantsareimportanttopeople,theyhelpusfulfillourbasicneeds.Wecanbuildthingswithtrees.3.Thetreesandplantstakeenergyfromthesunandturnitintofood.4.Medicineandclothingarealsomadefromtreesandplants.,5.Plantscoverthesoil.Thatway,thewindandwaterdontcarrythesoilaway.6.Plantsalsomakeeverythinglookbeautiful.7.Manyanimalsliveintheforestandeatthefruitfromthetrees.Inaword,wecantlivewithoutplants.,1.完成练习册第8课（