英语北师大版选修7 Unit21 Lesson 1 Chewing Gum PPT1 课件VIP免费

Discussinpairsandanswerthefollowingquestions.1.Whatdoyouthinkofchewinggum?Isitgoodorbadforyou?2.Doyouoryourfriends/familybuyit?Why?3.Whatdoyoudoafterchewingit?Lookatthetitleofthemagazinearticleandpredictwhichissuesmaybecoveredinthearticle.Thenreadthearticlequicklyandseeifanyofyourguessesareright?Itisaboutwhetherchewinggumisgoodorbadforyou.ReadthetextquicklyanddivideitintofourReadthetextquicklyanddivideitintofourparts,thensummarizethemaintopicofeachparts,thensummarizethemaintopicofeachpart.part.Part1(paragrah---)Part1(paragrah---)Part2(paragraph---)Part2(paragraph---)Part3(paragraph---)Part3(paragraph---)Part4(paragraph---)Part4(paragraph---)AdvantageAdvantageDisadvantageDisadvantageHelpingpeople:Helpingpeople:1._________badbreath1._________badbreath2.____________toothde2.____________toothdecaycay3._______weight3._______weight4.__________smoke4.__________smoke1.makingdigestions1.makingdigestions____________________________________2.Causingfeelingsof2.Causingfeelingsof____________________________________3.Leadingto_________3.Leadingto_____________________________________4.Makingpeopleneglect_4.Makingpeopleneglect___________________________________________________________________1.1.Howseriousistheproblemofbadbreath?Howseriousistheproblemofbadbreath?2.2.Whatisaddedtosugar-freechewinggumwhichWhatisaddedtosugar-freechewinggumwhichmayhelppreventtoothproblems?mayhelppreventtoothproblems?3.3.Accordingtooneresearchproject,whatisoneAccordingtooneresearchproject,whatisonewayofburning70kilocalories?wayofburning70kilocalories?4.4.WhatwouldbetheeffectonthestomachofWhatwouldbetheeffectonthestomachofconstantchewing?constantchewing?5.5.WhatotheractivitiesarestatedthatarebetterthanWhatotheractivitiesarestatedthatarebetterthanchewinggum?chewinggum?MatchtheconditionalsentencesinMatchtheconditionalsentencesinitalicsitalicsininthetextwiththefollowingtypes:thetextwiththefollowingtypes:1.1.zeroconditionalzeroconditional2.2.1stconditional1stconditional3.3.2ndconditional2ndconditional4.4.3rdconditional3rdconditionalWhichofthesentencesinitalicstalkaboutthepast,thepresentandthefuture?Readthesentences.DotheydescribeReadthesentences.Dotheydescribesituationsthatare:situationsthatare:a)a)Trueorcouldpossiblyhappen?Trueorcouldpossiblyhappen?b)b)Imaginary,unrealorcontrarytofacts?Imaginary,unrealorcontrarytofacts?Ifhehastime,hewillcome.Ifhehastime,hewillcome.Wewon’tsucceedunlessweplanwell.Wewon’tsucceedunlessweplanwell.(unless=if---not)(unless=if---not)从句用一般现在时或现在完成时，主句用一从句用一般现在时或现在完成时，主句用一般将来时般将来时IfIwereamillionaire,Iwouldbuyabighouse.IfIwereamillionaire,Iwouldbuyabighouse.IfIwerethegirlinthestory,IwouldcallthepIfIwerethegirlinthestory,Iwouldcallthepoliceatonce.oliceatonce.TomorrowIwillgotoUSA.IfIwereinChina,TomorrowIwillgotoUSA.IfIwereinChina,Iwouldmakedumplingswithyou.Iwouldmakedumplingswithyou.表示与现在或将来事实相反表示与现在或将来事实相反从句从句主句主句过去式过去式would+Vwould+V原原Iwasonmyownyesterday.IftheyhadinvitedIwasonmyownyesterday.Iftheyhadinvitedme,Iwouldhavegonetotheparty.me,Iwouldhavegonetotheparty.Iwenttolibraryyesterday.IfIhadwenttotheIwenttolibraryyesterday.IfIhadwenttotheconcert,Iwouldhavetakenphotoswiththeconcert,Iwouldhavetakenphotoswiththesingers.singers.Hehadtrafficaccidentyesterday.IfhehadHehadtraffic...