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Module3JourneytospaceScientistshavesentspaceshiptoMars.Thejourneyhastakenseveralmonths.Astronautshavealreadybeentothemoon.NoonehasbeentoMarsyet,becauseMarsisveryfaraway,muchfartherthanthemoon.Scientistshavealsodiscoveredmanyothergalaxiesintheuniverse.现在完成时(二)1.用法:1)表示发生在过去的动作,对现在造成的影响或产生的结果,不与表示过去的时间状语连用。Ihavecleanedtheroom.(房间是我在过去打扫的,现在仍是干净的。)2)常与already,yet,never,ever,just等副词连用。①already意为“已经”,通常用于肯定句中,可放在助动词之后,过去分词之前,也可以放在句末。I’vealreadyreadthisbook.②yet用在疑问句中,意为“已经”;用在否定句中,意为“还”。yet常放在句末。—Hashefoundhiswatchyet?—No,notyet.④ever意为“曾经”,用于疑问句或否定句中,放在助动词与过去分词之间。HaveyoueverbeentoHongKong?⑤never意为“从来没有”,常与before连用。Ihavenevertravelledbyplanebefore.3)不能与表示过去的时间状语如yesterday,twodaysago等连用,但可以和表示从过去某一时刻延续到现在(包括“现在”在内)的时间状语连用,如today,before,thismorning,thesedays,sofar,inrecentyears等。Ihavewrittentwolettersthismorning.2.现在完成时与一般过去时的区别:1)现在完成时:表示过去发生的动作对现在造成了影响或产生了结果,不与确定的表示过去的时间状语连用。Jillhasboughtanewcomputer.(着重点是现在有了一台新电脑)2)一般过去时:表示过去某个时间发生的事情、存在的状态或发生的动作。侧重点在于陈述一件过去的事情,不强调对现在产生的影响。HevisitedGuilinin2008.(只说明去桂林的时间)3.havebeento,havegoneto和havebeenin的区别:Completethenewswithalready,justandyet.Lookatthesesentences.Nowchoosethecorrectanswer.1.Astronautshavebeen/gonetothemoonandreturned.2.Thespaceshiphasbeen/goneintospace.Itwilltravelfortendays.3.Theastronauthasbeen/gonetothespacestation.Hewillcomebacktomorrow.4.Thespaceshiphasbeen/gonetothespacestation.Itbroughtbacktwoastronauts.Completethesentenceswiththeexpressionsinthebox.3.Someastronauts_________tothemoontwice.4.TwoBritishastronauts__________tothespacestation.TheywillcomebackinJanuary.Completetheconversationwiththecorrectformoftheverbsinbrackets.Nicky:Yes,they’relookingforlifebutthey_____________(notfind)anythingyet.Bill:ThereweresomenewphotosofMarsinthenewspapertoday.(5)______you_____(see)themyet?Nicky:Yes.They’reamazing!Workinpairs.Role–playtheconversationinActivity4.Completetheemailwiththewordsinthebox.DearLiFang,I’ve(1)________finishedreadingagreatbookatschool.Ihaven’t(2)________anythingasgoodasthatforalongtime!It’sastoryabou