Unit5RevealingnatureUsingLanguage课件高二英语选择性

Period2Usinglanguage

Unit5Revealingnature1.Tolearnthebasicusageofpastperfect;2.Todosomeexercises.LearningaimsLeading-inLookatthesentencesfromthereadingpassageandanswerthequestions.1.Insentence(a),whichactionhappenedfirst,“suspected”or“evolvedfromacommonancestor”?

“evolvedfromacommonancestor”2.Insentence(b),whichactionhappenedfirst,“refusedtobelieve”or“evolvedfromlowerformsoflife”?“evolvedfromlowerformsoflife”3.Whatdoesthestructure“haddone”indicate?Itindicatestheactionhappenedbeforeacertainpastaction.Thepastperfectexpressestheideathatsomethingoccurredbeforeanotheractioninthepast.Itcanalsoshowthatsomethinghappenedbeforeaspecifictimeinthepast.pastperfectsimplepastPastperfect1.基本结构过去完成时表示过去的过去,其构成形式是“had+过去分词”。2.基本用法

(1)表示在过去某一时间或动作之前已经发生或完成的动作。

它表示的时间是过去的过去,常与bylastyear,bythetimeof等连用。Hehadgonetobedby10:00lastnight.昨晚十点钟之前他已经上床睡觉了。(2)表示从过去某一时间开始一直延续到过去另一时间的动作或状态。常与for(后跟过去的时间段)或since(后跟过去的时间点)等连用。ThetrainhadstartedwhenIgottothestation.当我到达车站时火车已经开走了。TheminuteIsawaladygettingoffthebus,Iknewitwasshe,forIhadseenherbefore.我一看到正在下公共汽车的那位女士就知道是她,因为我以前见过她。

3.常见结构(1)Bytheendof+名词(短语),主语+haddone...(2)主句(haddone),before+过去时间状语

Ihadreachedthestationbeforesixo'clock.六点钟之前我已到达车站。(3)用在told,said,knew,heard,thought等动词后的宾语从句,表示动作发生在这些动词之前。ShesaidthatshehadneverbeentoParis.她说她从未去过巴黎。(4)Bythetime+从句(did/was/were),主语+haddone...Bythetimewearrived,everyonehadreceivedmedicalcare.我们到达时,每个人都已接受了医疗护理。(5)主语+haddone...,before从句(did/was/were)Fortunately,thepeoplehadleftthevillagebeforethevolcanoerupted.幸运的是,火山喷发前人们就已经离开了村庄。(6)主语+haddone...,when从句(did/was/were)TheyhadalreadyputthefireoutwhenIreturnedtothevillage.当我返回村子时,他们已将大火扑灭。(7)主语+(did/was/were),after从句(haddone)Theearthquakehappenedinthedaytimeafterpeoplehadalreadylefthomeforworkorschool.地震发生在白天,当时人们已离开家去上班或上学了。(8)用在hardly(scarcely,barely)...when...,nosooner...than...句型中HardlyhadIgothomewhentherainpoureddown.我刚到家大雨就倾盆而下。(9)用在It/This/Thatwasthefirst/...time+that从句(haddone)中Itwasthethirdtimethathehadmadethesamemistake.这是他第三次犯同样的错误了。(10)用在Itwas/hadbeen+一段时间+since从句(haddone)中Itwastenyearssincewehadhadsuchawonderfultime.我们十年都没这么高兴了。(11)hope,plan,mean,expect,intend,suppose,want,think等动词有时用过去完成时表示一个本来打算做而未做,或曾经设想而未实现的事Theyhadwantedtohelpbutcouldnotgetthereintime.他们本想帮忙,但未及时赶到那儿。(12)用于表示与过去事实相反的if虚拟条件句中Ifshehadseenyouyesterday,shewouldhavetoldyouthetruth.如果她昨天见过你,她就会告诉你事实的真相了。(13)用在wish后的宾语从句中,表示与过去事实相反Iwishedthathehadn’tmadesuchamistake.我希望他从未犯过这样的错误。【即学即练】单句语法填空(1)Bythetimewearrived,theotherguests_________(be)there.(2)Nosooner_____(have)hebeguntospeakthantheaudienceinterruptedhim.(3)Beforewegottothetrainstation,thetrain__________(leave).hadbeenhadhadleft

SummaryExerciseⅡ.单句写作(1)我们到的时候，其他客人都已经在那了。(bythetime)____________________________________________________________.

(2)他刚要开始说话，观众就打断了他。(nosooner...than)_______________________________________.

(3)昨天下午六点之前我已经到达车站。(before)________________________________________________.

(4)这是他第一次见到住在乡下的祖父母。(Itwasthefirsttimethat...)________________________________________________________.

Bythetimewearrivedthere,theotherguestshadalreadybeenthereNosoonerhadhebeguntospeakthantheaudienceinterruptedhimIhadreachedthestationbefore6p.m.yesterday

Itwasthefirsttimethathehadseenhisgrandparentsinthecount