Unit13 SectionA（3a-4c）课件2022-2023学年人教版九年级英语全册

Unit13We’retryingtosavetheearth.SectionA3a~4cObjectivesTolearnsomekeywordsandusefulexpressionsTolearnsomethingaboutendangeredanimals--sharks.Theyareendangered.themostdangerousanimalintheoceansharkButtheyarealso

endangered.shark鲨鱼Manypeoplethinkthatsharksaretoostrongtobeendangered,

buttheyarewrong.Thesharksareendangered!ReadthepassagequicklyPara.1A.Twogroupsagainst“finning”.

Para.2B.Somethingaboutsharkfinsoup.

Para.3C.Sharksareendangerednow.鳍sharkfinsoup1.Whereissharkfinsouppopular?2.Whatdoesitmeanwhenpeopleenjoyabowlofsharkfinsoup?ReadPara.1southernChinaThey’rekillingawholesharkwhentheyenjoyabowlofsharkfinsoup.ReadPara.21.Whyisitharmfultotheenvironment?2.Whatdothetwonumbersmean?70million90percentSharksareatthetopofthefoodchain,soiftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.Around70millionsharksarecaught

andtradedeveryyear.Thenumbersofsomekindsofsharkshavefallen

byover90percent

inthepast20to30years.ReadPara.32.Whataretheydoing&whathavetheydone?1.Whatarethetwoenvironmentalprotectiongroups?ReadPara.31.Whatarethetwoenvironmentalprotectiongroups?美国野生救援会(WildAid)是1999年在美国注册的非盈利机构，总部在美国旧金山，它对濒临绝迹的野生动物提供直接的保护，并且发展许多有创意的计划，以教育大众关于野生动物及生态平衡的重要性。世界自然基金会(WWF)是在全球享有盛誉的、最大的独立性非政府环境保护组织之一，自1961年成立以来，WWF一直致力于环保事业，在全世界拥有超过500万支持者和超过100个国家参与的项目网络。ReadPara.32.Whataretheydoing&whathavetheydone?Theyareteachingthepublicabout“finning”.Theyhaveevenaskedgovernmentstodeveloplaws(法律)tostopthesaleofsharkfins.3bReadthepassageagainandfillintheblankswiththewordsinthebox.soalthoughifbutwhen

Manypeopledonotrealizetheyarekillingawholeshark______theyenjoyabowlofsharkfinsoup.2.Sharksareatthetopofthefoodchain,____iftheirnumbersdrop,theocean’secosystemwillbeindanger.whenso3.Manythinkthatsharksaretoostrongtobeendangered,_____theyarewrong.4._________therearenoscientific

studiestosupportthis,alotofpeoplebelievethatsharkfinsaregoodforhealth.5.Sharksmaydisappearoneday___wedonotdosomethingtostopthesaleofsharkfins.butAlthoughif现在进行时(presentprogressivetense)现在完成时(presentperfecttense)usedto被动语态(passivevoice)情态动词(modalverbs)Readthesentencesbelow,payingattentiontotheunderlinedparts.Wearetrying

tosavetheearth.Theriverusedtobesoclean.Theairisbadlypolluted.Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.Weshouldhelpsavethesharks.Wearetryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharksfinsaregoodforhealth.PresentperfectWeshouldsavethesharks.ModelverbsGrammarFocus现在进行时(presentprogressive)概念：表示现在正在发生的动作。谓语构成：be(am/is/are)+v-ing（动词的现在分词）标志性词汇：now,rightnow,look,listen一般在动词原形后面+inggoaskgoingasking以不发音的e结尾的，去掉e，再加-ingwritetakewritingtaking重读闭音节以一个辅音字母结尾的，双写这一个字母，再加-ingget

runswimgettingrunningswimming以ie

结尾的动词，先把ie变成y

，再加-ing

lie

tie

die

lying

tying

dying动词-ing形式的构成：否定形式为：usednotto+do

或：didn’tusetodo疑问形式为：Used…to…?

或：Did…useto…?“usedto+动词原形”意为“过去常常做某事”；表过去的习惯或过去经常反复发生的动作或状态，但现在已经不再存在了。可用于所有人称。被动语态(PassiveVoice)谓语构成:be+v-p.p.主动语态与被动语态的区别：主动语态(TheActiveVoice)表示主语是动作的执行者;被动语态（ThePassiveVoice)表示主语是动作的承受者。一般将来时：

主语+will+be+及物动词的过去分词含情态动词：情态动词(can/could/may/might/must/should)+be+及物动词的过去分词一般现在时:am/are/is+及物动词的过去分词一般过去时：was/were+及物动词的过去分词构成：助动词have/has+过去分词现在完成时(presentperfect)概念：表示已经发生或完成的动作。标志性词汇：already,yet,ever,never,just,before,since,twice,recently,sofar,for+时间段,since+时间点/从句。情态动词:can

/could能够,

may/might可能、可以,

need需要,

have

to不得不,will

/would将要、愿意,

shall

/should应该,

must必须等。

情态动词无人称和数的变化；其后跟动词原形；必须与其后的动词原形一起构成谓语

。

情态动词(modalverbs)Exercise1.她过去常常周末和朋友闲逛。She_____________withfriendsonweekends.2.他习惯于每晚睡得很晚。

He____________________________atnight.3.Kenusedtobeafraidofdogs.(改为一般疑问句)______________________________?usedtohangoutisusedtosleepinglate/stayingupDidKenusedtobeafraidofdogs4.--Excauseme.IsthistherightwaytotheSummerPalace?--Sorry,I'mnotsure.butit____be.A.mightB.mustn'tC.can'tD.must5.Themanintheoffice____beMr.Black,becausehewenthomejustnow.A.musn'tB.maynotC.can'tD.needn't动词适当形式填空1.Thegirloften___________(dance)intheclassroom.2.It's5o'clocknow.Mike_________(have)dinner.3.--____youever____(be)totheUS?--Yes,twice.4.--Doyouoftencleanyourclassroom?--Yes.Ourclassroom__________(clean)everyday.5.Anewhighwayinmyhometown___________(