Unit 5 Using language 课件-2023-2024学年高中英语外研版（2019）选择性必修第一册

Unit5UsinglanguageWhenIgottoschool,IrealizedthatIhadleftmyschoolbagathome.BeforeIgottothebusstation,thebushadleft.BythetimeIgotbacktoschool,thebellhadrung.

Observeandsaya.BeforeIgottothebusstation,thebushadleft.b.BythetimeIgotbacktoschool,thebellhadrunggottothebusstationthebushadleftgotbacktoschoolthebellhadrungNowlet’strytosummariseitsuseinyourownwords.Pastperfect:

haddone

肯定式为__________________；

否定式为__________________；被动式为__________________。haddonehadnotdonehadbeendone过去完成时Pastperfect基本结构①IhadfinishedmyhomeworkbeforeIhadsupper.②JohnandJanehadnotknowneachotherforalongtimebeforetheygotmarried.③TheworkhadbeenfinishedbyuslastFriday.基本用法1.表示在过去的某一时间或某一动作之前完成的动作或存在的状态。(过去的过去,即站在“过去”的角度回顾一个更远的过去。)NowPastPastperfect过去完成时haddone一般过去时V-edgotto/arrivedathadgone/left在我们到达车站之前，火车就已经走了。Beforewegot

tothetrainstation,thetrainhadalreadyleft.基本用法2.表示从过去某一时间开始，一直延续到过去的另一个时间的动作，常用的时间状语有bethen,bytheendof,bythetime.到上学期期末为止，我们已经学了2000个英语单词了。Bytheendoflastterm,we________________________________.到那时为止，他们已经在那里住了10年了They_____________

therefortenyearsbythen.hadlearned2000Englishwords.hadlived基本用法3.表示本打算实现而未实现的愿望和计划,常用动词有:hope,want,expect,think,mean,suppose,intend,planIhopeyouwillpasstheexam.Ihopeyouhadpasstheexam.我希望你（下次）能通过考试。我真希望你通过了（上次）的考试。VS实际没通过可能会通过固定句型1)It/Thatwas+thefirst/second…+time+that从句，从句谓语常用过去完成时。ItwasthefirsttimethatIhadvisitedtheGreatWall.这是我第一次参观长城。2)Itwas+一段时间+since从句，从句谓语用过去完成时。Itwasthreeyearssincehehadjoinedthearmy.他参军三年了。hardly…when…和nosooner…than…“(A)刚一...,(B)就...”主句要部分倒装，并使用过去完成时，从句用一般过去时1.HardlyhadIleftwhenitbegantorain.我刚离开就开始下雨了。2.Nosoonerhadhesatdownthanthephonerang.他刚坐下，电话铃就响了。特殊句型1.He___________(learn)3000wordsbeforehewenttoEngland.2.Theoldmantoldusthathe____________(travel)tomanyplaces.3.Itwasthethirdtimethathe___________(see)suchalargeanimal.4.Bythetimehegottotheairport,theplane____________(takeoff)5.Marydidherhomeworkand_______(wash)thedishes.hadlearnedhadtravelledhadseenhadtakenoffwashedExercisea.Naturaldisastersledtofoodshortagesinthe1960s.b.YuanLongpingbegantodoresearchonhybridrice.c.YuanLongpingdevelopedabettertypeofrice.YuanLongping_____________todoresearchonhyaridricebecausenaturaldisasters______________foodshortagesinthe1960s.Intheend,he____________abettertypeofrice.beganhadledtodevelopeda.GregorMendelchosetostudypeaplantsbecausetheircharacteristicswereeasytocontrol.b.GregorMendelmadeimportantdiscoveriesaboutgenetics.c.GregorMendeldiedin1884GregorMendel___________studypeaplantsbecausetheircharacteristicswereeasytocontrol.Bythetirmeofhisdeathin1894,he___________________discoveriesaboutgenetics.chosetohadmadeimportantcompetedecline eatliveintroduce arriveLonesomeGeorgewasthelastPintaIslandtorroise.Hediedin2012.AfterGeorge'sdeath,thePintaIslandtortoisewasdeclaredexinct.TheextinctionofthePintaIslandtortoiseisblamedonhumans.Beforehumans__________ontheisland,thespecies___________inislationand___________plantsthatnaturallygrewthere.Georgewasdiscoveredmanyyearsaftertheirarrival,andbythenhumans___________newspeciesthat_________forthefoodthetortoisesate