Unit 4 Discover useful structures 高中英語人教版選擇性必修第三冊

Unit4AdversityAndCourage

Period2:Discoverusefulstructures1.教學目標.TomasterthegrammarrulesofthePresentPerfectContinuoustense..ToknowthedifferencesbetweenthePresentPerfectContinuoustenseandthePresentPerfecttense..LearntotranslateandunderstandsentenceswiththePresentPerfectContinuoustensewhentakingexams.2.教學重難點.TomasterthegrammarrulesofthePresentPerfectContinuouslense..ToknowthedifferencesbetweenthePresentPerfectContinuoustenseandthePresentPerfecttense.三、教學過程Step1Lead-in(Observeanddiscover)ThisistheadventurethatIhavebeendreamingof.Wearenowcampedonthericeandwehavebeenmanagingtosurvive,butspringiscoming,andtheicewillsoonbegintomelt.Wehavebeenstrugglingfordays,butthingsonElephantIslandaregoingfrombadtoworse.Step2Presentation.基本結(jié)構：“have/hasbeen+現(xiàn)在分詞”否認句：主語+have/has+not+been+現(xiàn)在分詞…疑問句：Have/Has+主語+been+現(xiàn)在分詞…？基本含義：表示動作從過去某一時間開始一直持續(xù)到現(xiàn)在，可能剛剛停止，也可能仍在繼續(xù)。.現(xiàn)在完成進行時的用法1)表示過去發(fā)生并持續(xù)到現(xiàn)在的動作HowlonghaveyoubeenlearningEnglish?ShehasbeenburningthemidnightoiltoprepareforGRErecently.Tomhasbeenplayingtheonlinegamesformorethantwentyhours.Hisbrotherhasbeenwritingthisnovelsincelastyear.2）表示到目前為止的一段時間內(nèi)重復進行的活動Ihavebeentellingyounottomaketrouble.Theoldmanhasbeenrepairingcarsforthirtyyears.JackhasbeenpractisingTaiChiformorethanayear.（3）表達某種感情色彩:現(xiàn)在完成進行時有時帶有強烈的表揚或厭惡等感情色彩。We'vebeenlookingforwardtooursummervacation.Toomuchhasbeenhappeningtoday.學法點撥以下幾類動詞不能用于現(xiàn)在完成進行時：①表示感官、感覺：see,hear,smell等；②表示愛憎：love,prefer,mind等;③表示希望、意愿：wish,want,desire等；④表示相信、猜測：believe,think,suppose等;⑤非延續(xù)性動詞..現(xiàn)在完成進行時與現(xiàn)在完成時的區(qū)別（1）現(xiàn)在完成時強調(diào)完成和影響，現(xiàn)在完成進行時強調(diào)未完成和動作。I'vebeendoingmyhomework.我一直在做家庭作業(yè)。（還在做）Evefinishedmyhomework.我已做完家庭作業(yè)了。（己完成）（2）現(xiàn)在完成時經(jīng)常表單個事件，現(xiàn)在完成進行時可表重復事件。Juliahasgonetothelibrary.朱莉婭去圖書館了。（單個事件）Juliahasbeengoingtothelibraryforayear.朱莉婭在一年間經(jīng)常去圖書館。（重復事件）（3）現(xiàn)在完成時通常只陳述事實，而現(xiàn)在完成進行時含感情色彩。Whathaveyoudone?你做什么了？（僅是問問）Wherehaveyoubeen?Ihavebeenwaitingforyouintherainfortwohours.你去哪里了？我在雨中等了你兩個小時。（表示不滿）（4）表重復時，現(xiàn)在完成時強調(diào)成果，講次數(shù)；現(xiàn)在完成進行時強調(diào)持續(xù)，不講次數(shù)。Ihavesentthirtye-mailsthismorning.Ihavebeensendinge-mailsthismorning.（5）現(xiàn)在完成進行時不用于被動語態(tài)。假設要用，可用現(xiàn)在完成時的被動語態(tài)代替。Thehousehasbeenpaintedforamonth.Step3practice(1)翻譯句子。①我一■直等了你兩個小時。②我等你兩個小時了。⑵用所給詞的適當形式填空。?There(exist)anoldtemplesincetheMingDynasty.②I(teach)Englishforalmosttwentyyears,andIwillstepinanothernewteachingyear.(3)完成句子①Wetheclassroomalltheafternoon.我們一整個下午一直在清掃教室。②Shelikethat.她一貫是那樣工作的。(3)Tvefortwohours,butIhaven,tfinishedit.這本書我已經(jīng)讀了兩個小時了，但我還沒讀完。Theythematterseveraltimesthisyear.他們今年已經(jīng)屢次討論那件事了。@MyfatherBeijing,andhe'11bebackthisweek.我的父親去北京了，這個星期回來。(4)Readeachsituationandrewriteeachasentenceusingthepresentperfectcontinuoustense.Thedogstartedtobarkabouttwohoursago.Ireallyhopeitwillstopsoon.Stevestartedtoplayrugbyattheageofeight.Nowhehasbecomeaprofessionalplayer.③Timmyisholdingatabletennisbatandhisshorthairisdampwithsweat.Helooksalittletiredafterplayingtabletennisfortwohours.@Dianehasn'tgotmuchsleepthisweek.Shelooksterribletoday.Itriedtophoneyouthismorning.ImusthavetriedadozentimesbeforeIcaughtyouhere.Step4summary現(xiàn)在完成進行時表示動作從過去某一時間開始一直延續(xù)到現(xiàn)在，這個動作可能剛剛停止，也可能還在進行，常帶有一定的感情色彩。其構成為"have/