Unit13SectionA3a-3b課件 人教版英語九年級(jí)全冊

SectionA3a—3b

Unit13We’retryingtosavetheearth!

第2課時(shí)Lookatthepicturesandtalkabouttheanimals.Warming-upDoyoulikeanimals?Whatkindofanimalsdoyoulikebest?Doyouknowsomeendangeredanimals?Haveyoueverseenashark?Canyousaysomethingaboutshark?Doyouthinktheyareendangered?Whyaretheyendangered?Pre-readingDiscussionWheresharkfinsoupispopularNumberofsharkscaughtandtradedeveryyearHowgovernmentscanhelpTwoenvironmentalgroupsagainst“finning”InsouthernChina.Around70million.Todeveloplawstostopthesaleofsharkfins.WildAidandtheWWF.Readthepassageandcompletethefactsheet.While-reading()1.Wehavetokillawholesharktogetabowlofsharkfinsoup.T()2.Peoplecutoffsharks’finsandthrowthesharksbackintotheocean.T()3.Sharksareinthebottomofthefoodchainintheocean’secosystem.F()4.Sharkfinsaregoodforhealth.FReadthepassageandchooseTorF.While-readingReadthepassageandfillintheblankswiththewordsinthebox.soalthoughifbutwhen1.Manypeopledonotrealizetheyarekillingawholeshark______theyenjoyabowlofsharkfinsoup.2.Sharksareatthetopofthefoodchain,____iftheirnumbersdrop,theocean’secosystemwillbeindanger.3.Manythinkthatsharksaretoostrongtobeendangered,_____theyarewrong.4._________therearenoscientificstudiestosupportthis,alotofpeople

believethatsharkfinsaregoodforhealth.5.Sharksmaydisappearoneday___wedonotdosomethingtostopthesaleof

sharkfins.whensoWhile-readingAlthoughifbutPost-readingFillandretellendangeredslowlydiesover90percentWildAidstopthesaleofsharkfins1.Thismethodisnotonlycruel,butalsoharmfultotheenvironment.這種方法不但殘忍而且對(duì)環(huán)境有害。(1)notonly…butalso…用于連接兩個(gè)表示并列關(guān)系的成分，著重強(qiáng)調(diào)后者，其意為“不僅……而且……”；其中的also有時(shí)可

以省略。e.g.Shenotonly

playswell,butalso

writesmusic.Post-readingLanguagepoints若連接兩個(gè)成分作主語，其謂語通常與靠近的主語保持一致。e.g.Notonlyyoubutalsohehastoleave.notonly放在句首，后接句子時(shí)要用倒裝結(jié)構(gòu)。e.g.Notonly

had

thepoormanbeenfined,butalsohehadbeensenttoprison.(2)beharmfulto意為“對(duì)……有害”e.g.Smokingisharmfulto

thehealth.Playingcomputergamesmuchisharmfulto

students.Post-reading2.Sharksareatthetopofthefoodchainintheocean’secosystem.

鯊魚位于海洋生物系統(tǒng)食物鏈的頂部。atthetopof意為“在……最高地位；用最高/最大的(速度,聲音等)”e.g.Heshoutedatthetopof

hisvoiceinorderthathemightbeheard.Post-readingPost-reading3.Iftheirnumbersdroptoolow,itwillbringdangertoalloceanlife.

如果它們的數(shù)目降至過低，會(huì)給所有海洋生物帶來危險(xiǎn)。(1)此句復(fù)數(shù)形式的numbers表達(dá)全海洋中鯊魚的總量。

當(dāng)表示數(shù)值的高或低時(shí)，number要用high或low修飾。e.g.Inthatcountry,thenumberofchildrengoingtoschoolishigher

incities

thanintownsandvillage.(2)常與number搭配的動(dòng)詞有g(shù)row,fall等。e.g.Thenumberoffamiliesthatowncarshasbeengrowingquicklyrecently.1.Thismethodisnotonlycruel,butalsoharmfultotheenvironment.2.Sharksareatthetopofthefoodchainintheocean’secosystem.3.Iftheirn