GrammarandusageUnitUnit11Presentperfectorpresentcontinuous?Presentperfectorpresentperfectcontinuous?1.Weusethepresentperfecttensetotalkaboutanactioncompletedintherecentpast,andthepresentperfectcontinuoustenseforanactionthatstartedinthepastandisstillhappening.•LiJia__________(read)abookaboutStonehenge.(Shefinishedreadingthebook.)•LiJia______________(read)abookaboutStonehenge.(Sheisstillreadingthebook.)hasreadhasbeenreading2.Wecanusethepresentperfecttenseforrepeatedactions,andthepresentperfectcontinuoustensefornon-stopactions.•I___________(visit)Egypttwicethismonth.(repeatedactions)•I________________(tour)Egyptfortwomonths.(non-stopaction)havevisitedhavebeentouring3.Weusuallyusethepresentperfecttensetoaskquestionsbeginningwithhowmanyorhowmuch,andthepresentperfectcontinuoustensetoaskquestionsbeginningwithhowlong.•Howmanytimes_____you_____(swim)inthelake?•Howlong_____you______________(swim)inthelake?haveswumhavebeenswimming4.Wecanuseeitherastateverboranactionverbwiththepresentperfecttensebutweusuallycanonlyuseanactionverbwiththepresentperfectcontinuoustense.Ihavehadthiscameraforfiveyears.stateverbIhavetakenphotosofUFOswiththiscamera.IhavebeentakingphotosofUFOswiththiscamera.actionverbactionverb5.Weusethepresentperfecttense,notthepresentperfectcontinuoustense,withthewordslikenever,yet,alreadyandever.()IhavenevervisitedAmerica.()IhavealreadybeentoAmerica.()IhaveneverbeenvisitingAmericaTTFExerciseA:Readtheconversationandcircletherightwordstocompleteit.Answers:(1)heard(2)beendoing(3)beenresearching(4)beendoing(5)started(6)done(7)read(8)found(9)started(10)beendoing(11)beenmaking1.Wheredoyouthinktheboyhasbeenwaiting?2.Whathavethealiensbeentravellingin?Whatdoesitlooklike?3.Whoelsehavethealienstalkedto?4.Whatotherplanetshavethealiensvisited?ExerciseB:TrytoanswerthefollowingquestionsaccordingtothecomicstripSampleanswersofPartB1Hehasbeenwaitingatanunder-groundstation.2TheyhavebeentravelinginanUFO.Itlookslikeasaucer.3Theyprobablyhavetalkedtoanimalsorplantsontheearthaswellascreaturesonotherplants.4TheyhavevisitedMars,Venus,Jupiterandsomeotherplanets.1.Gothroughwhatwelearnttodayandgetfamiliarwiththem.2.PrepareTask.Homework
