Unit1 Tales of the unexplained Grammar and usage1课件(牛津译林版必修2)

TalesoftheunexplainedGrammarandusage,Unit,1,Presentperfecttense&Presentperfectcontinuoustense,Presentperfecttense,Step1Lead-inGooverthenewsstoryonPage2andfindthesentencesusingthepresentperfecttense.Pleaseexplainwhythetenseisusedinthesesentences.,ThedisappearanceofJustin_(make)Kellyveryunhappy.,hasmade,1.Weusethepresentperfecttensetotalkaboutthingsthathappenedintherecentpast,butareconnectedtothepresent.,Step2Points1-6,I_(notsee)JustinsincelastFridaynight.,havenotseen,2.Wealsousethepresentperfecttensetotalkaboutsomethingthatstartedinthepast,andisstillhappeningnow.,3.Weusethepresentperfecttensewhentheexacttimeofanactionisnotclearorimportant.Weuseitwithtimeexpressionssuchas:alreadyeverforjustlatelyneverrecentlysinceyet,Exercise:completethefollowingsentenceswiththepropertense:(1)We_(study)Englishforaboutfiveyears.(2)They_(live)inthesouthsincetheirdaughterwasborn.(3)I_(read)yourarticlethreetimes.Itswellwritten.(4)Thestudent_(finish)herhomeworkalready.(5)Eric_just_(go)backtohishometown.,havestudied,havelived,haveread,havefinished,hasgone,Weusealreadyforaffirmativestatementsandyetfornegativestatements.Weusefor+aperiodoftimeandsince+apointintime.,4.Weusethepresentperfecttensetotalkaboutactionsthatwerecompletedonlyashorttimeago.,Thepolicehavejustfinishedsearchingtheareas.,5.Wecanalsousethepresentperfecttenseforrepeatedactions,thatis,weusethepresentperfecttensewiththetimeexpressionsonce/twice/threetimes6.Form:have/has+thepastparticipleoftheverb,Step3Readthediaryentryandthencompleteitusingthecorrectformsoftheverbsinbrackets.,Answers:(2)saw(3)hasvisited(4)loves(5)hasntvisited(6)hasswum(7)hasnevermet(8)hasdived(9)hasfound(10)hasntfound(11)Has,been,Presentperfectcontinuoustense,1.Form:have/hasbeen+thepresentparticipleoftheverb.,2.Weusethepresentperfectcontinuoustensetotalkaboutactionsthatstartedinthepastandarestillcontinuing.IhavenotbeensleepingwellsinceIreturnedhome.Past_Present,notbeingabletosleepwell,Ireturnedhome.,Imstillnotsleepingwell.,3.Wealsousethepresentperfectcontinuoustensetotalkaboutactionsthathavejustfinishedbutarestillconnectedtothepresentinsomeway.Kelly:SorryImlate.Haveyoubeenwaitinglong?Mavis:Yes.Ivebeenwaitingforanhour.,past_OnehouragoPresent,MavisstartedwaitingforKelly.,Kellyarrives.,havebeenobserving,havebeentalking,h