Unit2 Topic1 SectionA 课件 仁爱版九年级上册英语

Unit2SavingtheEarthTopic1Pollutionhascausedtoomanyproblems.SectionAStage1LearningaimsKnowledgeaimsWordsbee,butterfly,several,chemical,pour,waste,pollute,villager,mess,shame,goodnessPhrasescutdown,pour…into…SentencesTherebesb./sth.doingsth.GrammarThedifferencebetweenThePastSimpleTenseandThePresentPerfectSkillaimsUnderstandthedialogaboutthechangesoftheenvironment.Beabletotalkaboutthechangesoftheenvironmentbyusingdifferenttenses.Tellthedifferencebetweenthepastsimpletenseandthepresentperfect.HumanisticaimsAfterknowingaboutthechangesoftheenvironment,payattentiontotheenvironmentalproblems.Improvethesenseofhardshipandstrengthenthesocialresponsibility.destroythenaturecutdowntreespollutethenaturepourwastewaterTherapiddevelopmenthascausedmanyproblems,suchas…TherewerelotsofwhenIvisitedthelastyear.villageflowersandgrassWhathashappenedhere?Thehavethem.villagersdestroyedButnowhavegone.theflowersandgrass=have

disappeared.villagercn.Peoplelivinginavillage.destroyv.破坏，摧毁Stage2Pre-listeningTherewerelotsofwhenIvisitedthelastyear.hilltreesWhathashappenedhere?Thehavethem.farmerscutButnowhavegone.thetreescutdown砍倒cutdowntrees

cutthemdowndownStage2Pre-listeningTherewerelotsofwhenIvisitedthelastyear.lakefishWhathashappenedhere?Thehavethem.factoriespollutedButnowhavegone.thefishpollutev.污染pollutionn.Stage2Pre-listeningWorkinpairs.Lookatthepicturesandmakeupconversationssimilartotheexamplewithyourpartner.Example:A:Therewerelotsofflowersandgrass

whenIvisitedthevillagelastyear.B:Butnowtheflowersandgrass

havegone.A:Whathashappenedhere?B:Thevillagershavedestroyedthem.lake/fishfactory/pollutehill/treesfarmers/cutdownvillage/flowersandgrassvillagers/destroyTherewerebeesandbutterflies

whenIvisitedtheWestHilllastyear.beebutterflyThebeesandbutterflieshavegone.Thereareseveralchemicalfactoriespouringwastewaterintothestream.chemistryn.化学pourv.倒，倾泻wasteadj.废弃的v.浪费chemicaladj.化学的Pleasethrowwastepaperintothedustbin.wasteadj.Weshouldn’twastewater.我们不应该浪费水。v.废弃的浪费e.g.Hepouredredwineintotheglass.倒出；倾泻pour…into…把……倒入……Task1:Listento1aandanswerthequestions.IstheWesthillasbeautifulasbefore?2.WilltheygototheWestHillforapicnic?Stage3While-listeningNo,itisn’t.No,theywon’t.Task2:1b

Listento1aandmarkthewordswithP(Past)orN(Now).Stage3While-listening____beautiful____butterflies____dirty____grass____terrible____factory____bees____fresh____clean____wastewaterPPNPNNPPPNTask3:1c

Listenandcompletethesentencesinthetable.Thenretell1atoyourpartner.TwoyearsagoNow1.Itwasa_______________.2.Therewere_______________________.3.Theairwas_______________________andyoucouldsee_______________________.1.___________________havegone.2.Thewateris________andsmells___________.3.Thereareseveral_______________pouring_____________intothestream.4.__________haschanged.beautifulplacelotsofflowersandgrassfreshandthewaterwascleanbeesandbutterfliesdancingTheflowersandgrasssodirtyterriblechemicalwasteEverythingfactorieswaterThereareseveralchemicalfactoriespouringwastewaterintothestream.有几家化工厂正在往小溪里排放废水。Therebesb./sth.doingsth.……有……在做某事e.g.Therearesomepeoplewaitingforthebusatthebusstop.Stage4Post-listeningKeypoint:Task4Workingroupsandtalkaboutpollutioninaplaceyouarefamiliarwith.Thefollowingsentencesmayhelpyou.…ago,therewere…/itwas…Now,…have/hasgone.Whathashappened?…Everythinghaschanged.Oh,mygoodness!1.People_______________toomanytrees,soIdon’thaveenoughleavestoeat.2.Iliveintreesbutnowmanytrees__________.3.Ilikeleavesandgrass,butnowthey_________________.4.I__________hungryformonthsbecauseoflessbamboo.5.Humanpollutedthesea,soI_______________.6.Thewater__________manyyearsago.Butit_______________formetoliveinnow.

B.Listenagainandcompletethesentences.havecutdownhavegonehavedisappearedhavebeendon’tlivehappilywascleanistoodirtysummaryWelearn:1.Expressexclamation:Whatamess!Whatashame!Oh,mygoodness!2.KnowthedifferencesbetweenSimplePastandPresentperfect.Itwasabeautif