Unit 4 Discovering Useful Structures P41新人教版 选择性必修三

新人教选择性必修Book3

Unit4AdversityandCourageDiscoverusefulstructures

P41

Underlinethesentencesinthetext.AnexpeditiontotheSouthPolewiththegreatSirErnestShackleton-thisistheadventurethatIhavebeendreamingof.Wearenowcampedontheiceandwehavebeenmanagingtosurvive,butspringiscoming,andtheicewillsoonbegintomelt.Wehavebeenstrugglingfordays,butthingsonElephantIslandaregoingfrombadtoworse.PresentationPresentperfectcontinuous现在完成进行时1.现在完成进行时表示动作从过去的某一时间开始一直持续到现在，动作是否延续下去视上下文而定。TheChinesehavebeenmakingpaperfortwothousandyears.一、用法中国有2000年的造纸历史。动作还将继续下去这些天来他一直在给我们的杂志写文章。TomhadbeenphoningAliceeverynightforseveralmonths.几个月来，汤姆每天晚上都给艾丽斯打电话。2.表示从过去到现在的一段时间被反复进行的动作或存在的状态。Allthesedayshehasbeenwritingarticlestoourmagazine.allthesedays表示的是一段时间反复进行的动作。强调Tom最近几个月反复给Alice打电话。Hewastired,hehasbeenworkingallday.他累了，他整天都在工作。表示工作的持续状态。二、结构ShehasbeenburningthemidnightoiltoprepareforGRE.WehavebeengoingtoSeattleforahalfayear.I'vebeen

workingwithherfor20years.例：S（主语）+have/hasbeendoing三、现在完成时与现在完成进行时的区别：①在不用时间状语的情况下，现在完成进行时表示动作仍在持续进行，而现在完成时则表示动作在过去已结束。

我们一直在打扫教室。我们把教室打扫过了。

Wehavecleanedtheclassroom.Wehavebeencleaningtheclassroom.Ihavelivedhereallmylife.

我一辈子一直住在这儿。②表示暂时性的动作用完成进行时较好，表示长期的持续状态的动作用完成时较好。Hehasbeenstayingwithhisuncleduringthepasttwomonths.最近两个月他和他叔叔在一起。短暂性动作长期的持续状态Theyhaveknowneachothersince1970.③有些表示状态、感情、感觉的动词如：

have,exist,like,hear,know,sound等，不能用于现在完成进行时，但可用于现在完成时。他们自从1970年就相识了。JohnhaslovedMarysincetenyearsago.约翰爱了玛莉整整十年。IhavenotspokenEnglishfortwoyears.Hehasneverseenamanlikehim.④在否定句中一般用现在完成时而不用现在完成进行时。IhavenotbeenspeakingEnglishfortwoyears.Hehasneverbeenseeingamanlikehim.PracticeReadandrewritethesentencesusingthepresentperfectcontinuoustense.1.Thedogstartedtobarkabouttwohoursago.Ireallyhopeitwillstopsoon.______________________________________________________________________________________2.Stevestartedtoplayrugbyattheageofeight.Nowhehasbecomeaprofessionalplayer.________________________________________________________________________________________5.Itriedtophoneyouthismorning.ImusthavetriedadozentimesbeforeIcaughtyouhere.________________________________________________________________________________________2Thedoghasbeenbarkingforabouttwohours.Ireallyhopeitwillstopsoon.Stevehasbeenplayingrugbysincetheageofeight.Nowhehasbecomeaprofessionalplayer.Ihavebeentryingtophoneyouthismorning.ImusthavetriedadozentimesbeforeIcaughtyouhere.Readandrewritethesentencesusingthepresentperfectcontinuoustense.3.Timmyisholdingatabletennisbatandhisshorthairisdampwithsweat.Helooksalittletiredafterplayingtabletennisfortwohours.________________________________________________________________________________________________________________________________________________________________________________4.Dianehasn'tgotmuchsleepthisweek.Shelooksterribletoday.________________________________________________________________________________________2Timmyisholdingatabletennisbatandhisshorthairisdampwithsweat.Helooksalittletiredbecausehehasbeenplayingtabletennisfortwohours.Dianehasn'tbeensleepingwellthisweek.Shelooksterribletoday.PracticeCompletethesentencesbelowusingthecorrecttensesoftheverbsinbrackets.3Forthewholemorning,theboardofdirectors__________________(discuss)theresolutiontoincreasewagesinthecomingyear.Jason'sonlyrecreationispainting.He______________(learn)howtopaintforoverfiveyears.Eventhoughwelostthegame,weshouldbeproudofourselvesbecausewe_______(try)ourbestand______(work)asateam.Hefinally_______(finish)theresearchpaperunderhistutor'sguidanceMynephewSam__________________(collect)comicbookssincehewasfive.Nowhehasmorethantwohundredofthem.Thecompany___________________________(launch)anadvertisingcampaigntopromoteitscorporate.hasbeendiscussinghasbeenlearningtriedworkedfinishedhasbeencollectingislaunching/haslau