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1、GrammarandusageUnit 1Presentperfectorpresentcontinuous?2021/8/11 星期三1Present perfect or present perfect continuous?2021/8/11 星期三21.Weusethepresentperfecttensetotalkaboutanactioncompletedintherecentpast,andthepresentperfectcontinuoustenseforanactionthatstartedinthepastandisstillhappening.2021/8/11 星期
2、三3Li Jia _ (read)a book about Stonehenge.(She finished reading the book.)Li Jia _(read)a book about Stonehenge.(She is still reading the book.)has read has been reading2021/8/11 星期三4 2.Wecanusethepresentperfecttenseforrepeatedactions,andthepresentperfectcontinuoustensefornon-stopactions.I _(visit)Eg
3、ypt twice this month.(repeated actions)I _(tour)Egypt for two months.(non-stop action)have visited have been touring2021/8/11 星期三53.Weusuallyusethepresentperfecttensetoaskquestionsbeginningwithhowmanyorhowmuch,andthepresentperfectcontinuoustensetoaskquestionsbeginningwithhowlong.How many times _ you
4、 _(swim)in the lake?How long _ you _(swim)in the lake?haveswumhavebeenswimming2021/8/11 星期三64.Wecanuseeitherastateverboranactionverbwiththepresentperfecttensebutweusuallycanonlyuseanactionverbwiththepresentperfectcontinuoustense.2021/8/11 星期三7I have had this camera for five years.state verbI have ta
5、ken photos of UFOs with this camera.I have been taking photos of UFOs with this camera.action verbaction verb2021/8/11 星期三85.Weusethepresentperfecttense,notthepresentperfectcontinuoustense,withthewordslikenever,yet,alreadyandever.()I have never visited America.()I have already been to America.()I ha
6、ve never been visiting AmericaT TT TF F2021/8/11 星期三9Exercise A:Read the conversation and circle the right words to complete it.Answers:(1)heard (2)been doing(3)been researching (4)been doing (5)started (6)done (7)read (8)found (9)started (10)been doing(11)been making2021/8/11 星期三101.Where do you th
7、ink the boy has been waiting?2.What have the aliens been travelling in?What does it look like?3.Who else have the aliens talked to?4.What other planets have the aliens visited?Exercise B:Try to answer the following questions according to the comic strip2021/8/11 星期三11Sample answers of Part B1 He has
8、 been waiting at an under-ground station.2 They have been traveling in an UFO.It looks like a saucer.3 They probably have talked to animals or plants on the earth as well as creatures on other plants.4 They have visited Mars,Venus,Jupiter and some other planets.2021/8/11 星期三121.Gothroughwhatwelearnttodayandgetfamiliarwiththem.2.PrepareTask.Homework2021/8/11 星期三132021/8/11 星期三14