unit 2 plant a plant lesson 8 why are plants important 课件1

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1、Lesson8WhyArePlantsImportant?Unit2PlantaPlantWordssoiln.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.1.Treeshelpcleantheair.树能帮着清洁空气。helpvt.帮助，常用于两个句型：helpsb.

2、(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。Languagepoints2.Thenwecansitintheshadeunderatree.intheshade“在阴凉处”类似短语inthesuninthelight在阳光下在灯光下3.Donutsdon’tgrowontrees!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

3、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.turn…into…“把…转化…”e.g.我们可以把树制成纸.Wecanturnthetreeintopaper.在零下摄氏度的时候水会变成冰。WaterturnsintoiceatzerodegreesCelsius.takeenergyfrom“从…中获取能

4、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.Wecan’tlivewithoutplantswithout介词“没有”e.g.他没有吃早饭就去上学了.Hewenttoschoolwithoutbreakfast.他没说再见就走了.Heleftwithoutsayinggood-bye.没有水鱼就不能活.Fishcan’tlivewithoutwater.Whyar

5、eplantsimportant?Treeshelp____theair.Trees____usfood.Wecan____thingswithtrees.Wecan___underatree.We___booksfromtrees.Manyanimals____intrees.cleangivebuildsitmakeliveAllplantstakeenergy______thesunandturnit______food.A.to;fromB.into;toC.from;toD.from;intoExercise2.Plantscanhelp__theair.A.tocleanB.c

6、leaningC.cleanD.ofcleaning3.Wine______wheat.A.ismadefromB.ismadeofC.ismadebyD.ismadein4.Iwouldfail___yourhelp.A.inB.withC.withinD.withoutWhydoweneedplants?Findsomeanswerstothisquestion.Writedownyouranswers.let'sdoit!PeopleuseplantsinmanywaysForfoodThereareabouteightythousanddifferentplantsinthewor

7、ldthatpeoplecaneat.Buthalfoftheworld’sfoodcomesfromonlythreeplants:rice,cornandwheat.FormedicineWemakemanymedicinefromplants.What’smedicine?Doctorsusemedicinetohelpsickpeople.Good-bye