新外研版八下m3u3.ppt

*1.I’vejustmadeamodelspaceship.2.Hasitarrivedyet?3.Astronautshavealreadybeentothemoon.4.Wehavenotfoundlifeonanyotherplanetsyet.在现在完成时的句子中，already(已经)、just(刚刚)常用于肯定句，放在have和has的后面。yet(还、尚、仍然)常用于否定句和疑问句，（放在have和has的后面也可放在句末）。SpaceshiponMars!Astronautshave(1)________beentothemoonbuttheyhavenotbeentoanyotherplanets.However,aspaceship(2)_______arrivedonMarsandithas(3)_______sentbackphotosoftheredplanet.IstherelifeonMars?Wedonotknow(4)________.alreadyjustalreadyyetCompletethenewswithalready,justandyet.have/hasbeento与have/hasgoneto的区别:have/hasbeento表示某人“去过某地，现在已经回来了”。have/hasgoneto表示某人“去某地了”，这个人已经不在这里了。ThespaceshiphasgonetoMars.Ithasgonethere,butithasnotcomebackyet.Astronautshavebeentothemoon.Theywentthereandthentheycameback.Lookatthesesentences.1.Astronautshavebeen/gonetothemoonandreturned.2.Thespaceshiphasbeen/goneintospace.Itwilltravelfortendays.3.Theastronauthasbeen/gonetothespacestation.Hewillcomebacktomorrow.4.Thespaceshiphasbeen/gonetothespacestation.Itbroughtbacktwoastronauts.Nowchoosethecorrectanswer.Completethesentenceswiththeexpressionsinthebox.have/hasbeenhave/hasgone1.Aspaceship____________toMars.Itiscomingbacktotheearthnextyear.hasgone2.Lotsofastronauts___________tothespacestation.Theyfounditveryinteresting.3.Someastronauts____________tothemoontwice.4.TwoBritishastronauts____________tothespacestation.TheywillcomebackinJanuary.havebeenhavebeenhavegone现在完成时(2)当表示动作已经完成，并对现在有一定影响时，我们一般用现在完成时。同时，可分用just,already或yet加以强调或说明。例如：Ihavejustheardthenews.我刚听到消息。Astronautshavealreadybeentothemoon.宇航员已经去过月球了。Hehasjuststartedtoexploreotherplanets.我们才刚刚开始探索其他行星。可以看出，just用来表示“刚刚”，already用来表示“已经”，两者都用于肯定句中，一般是置于have/has之后