Unit13 SectionA（3a-4c）課件2022-2023學(xué)年人教版九年級英語全冊

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

endangered.shark鯊魚Manypeoplethinkthatsharksaretoostrongtobeendangered,

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

Para.2B.Somethingaboutsharkfinsoup.

Para.3C.Sharksareendangerednow.鰭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?美國野生救援會(WildAid)是1999年在美國注冊的非盈利機構(gòu)，總部在美國舊金山，它對瀕臨絕跡的野生動物提供直接的保護，并且發(fā)展許多有創(chuàng)意的計劃，以教育大眾關(guān)于野生動物及生態(tài)平衡的重要性。世界自然基金會(WWF)是在全球享有盛譽的、最大的獨立性非政府環(huán)境保護組織之一，自1961年成立以來，WWF一直致力于環(huán)保事業(yè)，在全世界擁有超過500萬支持者和超過100個國家參與的項目網(wǎng)絡(luò)。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現(xiàn)在進行時(presentprogressivetense)現(xiàn)在完成時(presentperfecttense)usedto被動語態(tài)(passivevoice)情態(tài)動詞(modalverbs)Readthesentencesbelow,payingattentiontotheunderlinedparts.Wearetrying

tosavetheearth.Theriverusedtobesoclean.Theairisbadlypolluted.Noscientificstudieshaveshownthatsharkfinsaregoodforhealth.Weshouldhelpsavethesharks.Wearetryingtosavetheearth.PresentprogressiveTheriverusedtobesoclean.usedtoTheairisbadlypolluted.PassivevoiceNoscientificstudieshaveshownthatsharksfinsaregoodforhealth.PresentperfectWeshouldsavethesharks.ModelverbsGrammarFocus現(xiàn)在進行時(presentprogressive)概念：表示現(xiàn)在正在發(fā)生的動作。謂語構(gòu)成：be(am/is/are)+v-ing（動詞的現(xiàn)在分詞）標(biāo)志性詞匯：now,rightnow,look,listen一般在動詞原形后面+inggoaskgoingasking以不發(fā)音的e結(jié)尾的，去掉e，再加-ingwritetakewritingtaking重讀閉音節(jié)以一個輔音字母結(jié)尾的，雙寫這一個字母，再加-ingget

runswimgettingrunningswimming以ie

結(jié)尾的動詞，先把ie變成y

，再加-ing

lie

tie

die

lying

tying

dying動詞-ing形式的構(gòu)成：否定形式為：usednotto+do

或：didn’tusetodo疑問形式為：Used…to…?

或：Did…useto…?“usedto+動詞原形”意為“過去常常做某事”；表過去的習(xí)慣或過去經(jīng)常反復(fù)發(fā)生的動作或狀態(tài)，但現(xiàn)在已經(jīng)不再存在了?？捎糜谒腥朔Q。被動語態(tài)(PassiveVoice)謂語構(gòu)成:be+v-p.p.主動語態(tài)與被動語態(tài)的區(qū)別：主動語態(tài)(TheActiveVoice)表示主語是動作的執(zhí)行者;被動語態(tài)（ThePassiveVoice)表示主語是動作的承受者。一般將來時：

主語+will+be+及物動詞的過去分詞含情態(tài)動詞：情態(tài)動詞(can/could/may/might/must/should)+be+及物動詞的過去分詞一般現(xiàn)在時:am/are/is+及物動詞的過去分詞一般過去時：was/were+及物動詞的過去分詞構(gòu)成：助動詞have/has+過去分詞現(xiàn)在完成時(presentperfect)概念：表示已經(jīng)發(fā)生或完成的動作。標(biāo)志性詞匯：already,yet,ever,never,just,before,since,twice,recently,sofar,for+時間段,since+時間點/從句。情態(tài)動詞:can

/could能夠,

may/might可能、可以,

need需要,

have

to不得不,will

/would將要、愿意,

shall

/should應(yīng)該,

must必須等。

情態(tài)動詞無人稱和數(shù)的變化；其后跟動詞原形；必須與其后的動詞原形一起構(gòu)成謂語

。

情態(tài)動詞(modalverbs)Exercise1.她過去常常周末和朋友閑逛。She_____________withfriendsonweekends.2.他習(xí)慣于每晚睡得很晚。

He____________________________atnight.3.Kenusedtobeafraidofdogs.(改為一般疑問句)______________________________?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動詞適當(dāng)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___________(