人教版（2019）選修三Unit 4 Adversity and Courage Discover Useful Structures課件

Period3DiscoverusefulstructuresGrammar–PresentPerfectContinuousTense現(xiàn)在完成進(jìn)行時(shí)DiscoverusefulstructuresWearenowcampedontheiceandwehavebeenmanagingtosurvive,butspringiscoming,andtheicewillsoonbegintomelt.Wehavebeenstrugglingfordays,butthingsonElephantIslandaregoingfrombadtoworse.DiscoverusefulstructuresQuestion1:Whichtenseisusedtoemphasisethecontinuationoftheaction?ThisistheadventurethatIhavebeendreamingof.ThisistheadventurethatIhavedreamtof.Question2:Whichtenseisusedtotalkaboutafinishedaction,andwhichisaboutanunfinishedaction?Wehavebeenmanagingtosurvive.Wehavemanagedtosurvive.Question3:Whichtenseisusedtoemphasisethelengthoftime?Wehavebeenstrugglingfordays.Wehavestruggledfordays.DiscoverusefulstructuresGrammarPoints:現(xiàn)在完成時(shí)結(jié)構(gòu)：have/hasdone現(xiàn)在完成進(jìn)行時(shí)結(jié)構(gòu)：have/hasbeendoingTomhasbeenpaintingthefence.Hisclothesarecoveredinpaint.Thefenceusedtobewhite,butnowitisgreen.Tomhaspaintedthefence.現(xiàn)在完成進(jìn)行時(shí)與現(xiàn)在完成時(shí)的區(qū)別總結(jié)如下：1.現(xiàn)在完成進(jìn)行時(shí)強(qiáng)調(diào)動(dòng)作的延續(xù)，而現(xiàn)在完成時(shí)強(qiáng)調(diào)動(dòng)作的完成。例如：Ihavebeenreadingthebookyoulentme,butIhaven'tfinishedityet.Discoverusefulstructures2.現(xiàn)在完成進(jìn)行時(shí)多用來詢問和表達(dá)一個(gè)正在發(fā)生的動(dòng)作或活動(dòng)延續(xù)多長時(shí)間，而現(xiàn)在完成時(shí)多用來詢問和表達(dá)一個(gè)已結(jié)束的動(dòng)作或活動(dòng)所完成的分量和頻率。例如：Howlonghaveyoubeenplayingbasketball?Ihavebeenplayingbasketballfor12years.Maryisstillworkingonherpaper.She'sbeenworkingonitsincelastFriday.Howmanyfishhaveyoucaughtbytheriver?Howmuchmoneyhaveyousavedforyournextholiday?Shehasbeentothepianoclasstwicethisweek.Discoverusefulstructures3.部分動(dòng)詞(如live、work、teach,study等)用這兩種時(shí)態(tài)所表達(dá)的意思差別不大。例如：I'velived(beenliving)herefor30years.Howlonghaveyouworked(beenworking)here?4.另外，有些動(dòng)詞一般不用于進(jìn)行時(shí)態(tài)。除了語法注釋中所列的不具有延續(xù)性的動(dòng)詞以外,還包括like、love、hate、want、need、prefer、know、realise、mean、understand、believe、remember,belong、contain、consist、seem等。Discoverusefulstructures–課本P105DiscoverusefulstructuresDidthisactionstartfromthepastandlast/repeattillnow?Isitlikelythatthisactionwillcontinueinthefuture?Isthespeakerexpressingstrongemotioninthissentence?Isthespeakertryingtoemphasisetheactionhaslastedlong?DiscoverusefulstructuresStevehasbeenplayingrugbysincetheageofeight.Nowhehasbecomeaprofessionalplayer.….Helooksalittletiredbecausehehasbeenplayingtabletennisfortwohours.Dianehasn’tbeensleepingwellthisweek.Shelooksterribletoday.Ihavebeentryingtophoneyouthismorning.ImusthavetriedadozentimesbeforeIcaughtyouhere.DiscoverusefulstructureshasbeendiscussinghasbeenlearningtriedworkedfinishedhasbeencollectingislaunchinghaslaunchedlaunchedDiscoverusefulstructuresDoyouhaveanyhobbiesorinterests?Howlonghaveyoubeenlearning/playing…?Whathaveyoubeendoingrecently?Discoverusefulstructures–PracticemakesperfectDoyouhaveanyhobbies?Sure.Ihaveseveralhobbiessuchastabletennis,photography,andkiteflying.Butmyfavouritehobbyisplayingtheguitar.Discoverusefulstructures–PracticemakesperfectHowlonghaveyoubeenlearningtheguitar?IhavebeenlearningtheguitarsinceIwaseightyearsold.IsawavideoofsomeoneplayingandIfellinlovewithitDiscove