人教英语选修7Unit3Learning about language 共21张

Unit3UndertheseaLearningaboutlanguageLearningaboutlanguage本节课的重点（keypoints）:①复习动词-ing形式的构成方式。②复习动词-ing形式的一般式和一般被动式及它们在句子中的句法功能，以便让学生在具体语境中理解并且正确使用。(thev-ingformandthepassivev-ingform)③使用本单元重点词汇解决具体语境中的问题。StepⅠ从导学案入手，帮助学生复习动词-ing的构成方式以及动词-ing的一般和一般被动式。①复习动词-ing形式的构成方式。②复习动词-ing形式的两种形式。（一般式和一般被动式）V-ing的一般式为v-ingV-ing的一般被动式为being加动词的过去分词看一下本单元第一篇课文中含有动词-ing的句子，出这些动词-ing形式做什么句子成分。①OntheafternoonIarrivedatthestation,asIwassortingoutmyaccommodation,Iheardaloudnoisecomingfromthebay.②Werandowntotheshoreintimetoseeanenormousanimaloppositeusthrowingitselfoutofthewaterandthencrashingdownagain.宾补③IlookeddownintothewaterandcouldseeOldTomswimmingbytheboat,showingustheway.④IhadalreadyheardthatGeorgedidn'tlikebeingkeptwaiting,soeventhoughIdidn'thavetherightclotheson,Iracedafterhim.⑤Withoutpausingwejumpedintotheboatwiththeotherwhalersandheadedoutintothebay.宾语⑥Afewminuteslater,therewasnoTom,soGeorgestartbeatingthewaterwithhisoarandtherewasTom,circlingbacktotheboat,leadingustothehuntagain.⑦FromJames'sface,Icouldseehewasterrifiedofbeingabandonedbyus.⑧“Andthoseothersarestoppingitdivingorfleeingouttosea,”Georgetoldme,pointingtowardsthehunt.⑨Beingbadlywounded,thewhalesoondied.⑩Seeingisbelieving.⑾Iamnotinterestedinthetopicbeingdiscussed.状语主语、表语定语Summary:动词-ing形式可以在句子中做主语，宾语，表语，定语，状语，宾补。Answers:1beingattacked3BeingIncluded5beingtold7beingtaken8beingphotographed宾语主语宾语driftnetawallofdeathFishingnetsintheseahavebecomeaseriousproblem.Theymaybemanykilometerslongwithplasticballstokeepthem（float）onthewater,andweightstoholdthemdownontheseabed.Unfortunately,theplasticnetsareimpossibletoseeunderwater.Sothetermtodescribethemis“awallofdeath”.floatingTheiradvantageisthattheycatchfishefficiently.However,theyalsocausedangertoseaanimals.First,notonlytargetfisharecaughtinthenet,butmanyotherseaanimalsarefoundhangingthere.Thosenotneededfor(market)arethrownaway.Second,netsareindangerof(cut)loosebyfishermen.marketingbeingcutIfanetbecomesfree-floating,itismovedbythetidesallovertheocean.Itbehavesasahiddendanger,(kill)allthataretrappedinit.Somanyanimalsbeingcaughtindriftnetsmakemanythinkthatitisnecessarytohaveaworldwidebanonalldriftnetfishing.killingStepⅤ课本P22第3题改编为语篇填空题，让学生在语篇中来运用重点词汇，即符合高考的要求，又让学生掌握了本单元的重点词汇。WhenIwasyoung,myparentsliked(jog)onthebeach.Soweusedtovisittheseasideonourannualholiday.Wealwaysstayedinaccommodationclosetheshorebecausemyparentshadagoodrelationshipwiththe(own)ofthehotel.joggingtoownerWealsowent（snorkeleachtimeandwoulddiveintothewavestoseethecolorfulfish.ASIgrewolderIwasallowedtogotogreater(dept)andfurtheroutbeyondthebay.ThereIsawsmallsharksasthey(swim)lazilyaroundtheseabottom.swamsnorkellingdepthsOnedayI（witness)howtheywouldpursuetheirprey(swift),Andthesmallfishhadnotime(flee)away.Iwantedtoyellandwarnthepoorfishbutthatwasimpossibleunderwater.ThankGoditwas;Imighthavebeenswallowedinstead!witnessedswiftlytofleeotherwise?创新小练：?1.Hegotexcitedwhenheheardthenews.(改变句子语序，实现句子形式多样化。)?Hearingthenews,hegotexcited.?2.Savingishaving.(翻译)?3.他没有被邀请就来参加聚会。(without)?Hecametothepartywithoutbeinginvited.?Summary:?1.牢记动词-ing的变化规则，尤其注意常用词汇：writing,preferring等?2.动词-ing形式在句子中可以做主语，宾语，表语，定语，宾补，状语等，要慢慢学会句子成分，以便提升解决实际问题的能力。?3.动词-ing形式的一般被动式为being加动词的过去分词，在需要使用动词-ing形式的地方，如果有被动的意义，那就使用它的被动形式。Homework：1.预习动词-ing形式的完成形式和完成被动形式。2.思考动词-ing形式做表语和进行时态的区别。