Unit5RevealingnatureUsingLanguage課件高二英語選擇性

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.基本結構過去完成時表示過去的過去,其構成形式是“had+過去分詞”。2.基本用法

(1)表示在過去某一時間或動作之前已經發(fā)生或完成的動作。

它表示的時間是過去的過去,常與bylastyear,bythetimeof等連用。Hehadgonetobedby10:00lastnight.昨晚十點鐘之前他已經上床睡覺了。(2)表示從過去某一時間開始一直延續(xù)到過去另一時間的動作或狀態(tài)。常與for(后跟過去的時間段)或since(后跟過去的時間點)等連用。ThetrainhadstartedwhenIgottothestation.當我到達車站時火車已經開走了。TheminuteIsawaladygettingoffthebus,Iknewitwasshe,forIhadseenherbefore.我一看到正在下公共汽車的那位女士就知道是她,因為我以前見過她。

3.常見結構(1)Bytheendof+名詞(短語),主語+haddone...(2)主句(haddone),before+過去時間狀語

Ihadreachedthestationbeforesixo'clock.六點鐘之前我已到達車站。(3)用在told,said,knew,heard,thought等動詞后的賓語從句,表示動作發(fā)生在這些動詞之前。ShesaidthatshehadneverbeentoParis.她說她從未去過巴黎。(4)Bythetime+從句(did/was/were),主語+haddone...Bythetimewearrived,everyonehadreceivedmedicalcare.我們到達時,每個人都已接受了醫(yī)療護理。(5)主語+haddone...,before從句(did/was/were)Fortunately,thepeoplehadleftthevillagebeforethevolcanoerupted.幸運的是,火山噴發(fā)前人們就已經離開了村莊。(6)主語+haddone...,when從句(did/was/were)TheyhadalreadyputthefireoutwhenIreturnedtothevillage.當我返回村子時,他們已將大火撲滅。(7)主語+(did/was/were),after從句(haddone)Theearthquakehappenedinthedaytimeafterpeoplehadalreadylefthomeforworkorschool.地震發(fā)生在白天,當時人們已離開家去上班或上學了。(8)用在hardly(scarcely,barely)...when...,nosooner...than...句型中HardlyhadIgothomewhentherainpoureddown.我剛到家大雨就傾盆而下。(9)用在It/This/Thatwasthefirst/...time+that從句(haddone)中Itwasthethirdtimethathehadmadethesamemistake.這是他第三次犯同樣的錯誤了。(10)用在Itwas/hadbeen+一段時間+since從句(haddone)中Itwastenyearssincewehadhadsuchawonderfultime.我們十年都沒這么高興了。(11)hope,plan,mean,expect,intend,suppose,want,think等動詞有時用過去完成時表示一個本來打算做而未做,或曾經設想而未實現的事Theyhadwantedtohelpbutcouldnotgetthereintime.他們本想幫忙,但未及時趕到那兒。(12)用于表示與過去事實相反的if虛擬條件句中Ifshehadseenyouyesterday,shewouldhavetoldyouthetruth.如果她昨天見過你,她就會告訴你事實的真相了。(13)用在wish后的賓語從句中,表示與過去事實相反Iwishedthathehadn’tmadesuchamistake.我希望他從未犯過這樣的錯誤?！炯磳W即練】單句語法填空(1)Bythetimewearrived,theotherguests_________(be)there.(2)Nosooner_____(have)hebeguntospeakthantheaudienceinterruptedhim.(3)Beforewegottothetrainstation,thetrain__________(leave).hadbeenhadhadleft

SummaryExerciseⅡ.單句寫作(1)我們到的時候，其他客人都已經在那了。(bythetime)____________________________________________________________.

(2)他剛要開始說話，觀眾就打斷了他。(nosooner...than)_______________________________________.

(3)昨天下午六點之前我已經到達車站。(before)________________________________________________.

(4)這是他第一次見到住在鄉(xiāng)下的祖父母。(Itwasthefirsttimethat...)________________________________________________________.

Bythetimewearrivedthere,theotherguestshadalreadybeenthereNosoonerhadhebeguntospeakthantheaudienceinterruptedhimIhadreachedthestationbefore6p.m.yesterday

Itwasthefirsttimethathehadseenhisgrandparentsinthecount