高中二年级下学期英语《选择性必修二 Unit 4 Discover useful structures》教学设计

选择性必修二DiscoverusefulstructuresLearningobjective:Bytheendofthisclass,studentswillbeableto:analysethedifferenceinusesandmeaningsofpastparticiplesand–ingforms.Step1LeadinWhatdothesesentenceshaveincommon?1.Forbothofthem,thethoughtofcrossingthewholecountrybyrailwasexciting.2.Beforestartingout,theyspentacoupleofdaysinVancouver,seeingthesights.3.Thenextdaywasclearandmild,andtheywerepleasedtoseethebeautifulmountainslookingoutoverthecity.Canyoufindmoreexamplesinthepassage?1.Thenextmorning,thetwogirlsaroseearlytotakethetraintoLakeLouise,passingthroughtheCanadianRockies.2.Seenfromthetrainwindow,themountainsandforestsofCanadalookedmassive.3.Lookingatthebeautifulscenery,theybothagreedthatitwasthemostawesomejourneytheyhadevertaken.4.Edmontonisfreezingcoldinwinter,withdailytemperaturesaveraging-10℃.5.However,theydidnotanticipateseeingsuchanopencountry,andweretrulyamazed.6.…andtherewasfrostontheground,confirmingthatautumnhadarrivedinCanada.Step2Fillineachblankwiththecorrectformofaverbfromthebox.Findthedifferencebetweeneachpairofsentences,payingattentiontothe-edand–ingforms.ThentranslatethesentencesintoChinese.see,frighten,head,amaze1.Thegirlswereamazedtoseesuchanopencountry.Thefarmscoveredaverylargearea,whichwasamazing.2.Goingintothewildernessalonecanbefrightening.Doyoufeelfrightenedwhengoingintothewildernessalone?3.Seenfromthetopofthemountain,thescenerywasreallyfascinating.Seeingthesceneryfromthetopofthemountain,Iwasfascinatedbytheautumncolors.4.Headingeastwards,youwillpasstheCanadianRockies.Finally,thecompany--headedbyitsnewmanager--startedtomakeaprofit.Step3Explaintherules1.过去分词作表语和状语与动词-ing形式的比较作表语：过去分词表示人或物的心情或状态等,也可以理解为心情或状态受到外界影响,有“感到……”之意;动词-ing形式则表示人或物的自身特征,有“令人……”之意。作状语:过去分词与其逻辑主语之间是被动关系,往往表示完成;动词-ing形式与其辑主语之间是主动关系,一般表示动作正在进行。2.过去分词作表语过去分词可放在连系动词be,get,feel,remain,seem,look,become等之后作表语,表示主语所处的情绪或状态。过去分词作表语与被动语态的区别:“be+过去分词”表示状态时，是系表结构，此时的过去分词通常已形容词化;表示动作时，是被动语态，且绝大多数被动结构中的动作执行者由介词by引出。英语中有很多与感觉有关的使令动词，其V.-ing形式表示主动意义，即“令人……的”，多用来修饰物；其V.-ed形式表示被动意义，即“感到……的”，多用来修饰人、人的声音或表情等。3.过去分词作状语过去分词(短语)作状语,表示动作发生的背景或情况,其逻辑主语就是句子的主语。表示时间过去分词(短语)作时间状语,相当于一个时间状语从句。表示原因过去分词(短语)作原因状语,相当于一个原因状语从句。表示条件过去分词(短语)作条件状语，相当于一个条件状语从句。表示让步过去分词(短语)作让步状语,相当于一个让步状语从句。表示方式或伴随过去分词(短语)作方式或伴随状语,可以转换成一个并列句。【注意】过去分词作状语,它的逻辑主语必须和句子的主语相一致。过去分词作状语时,其前面可以带有相应的连词,如when,though,although,asif,if,unless,until,once等,表时间、让步、条件方式等。Step4Finishsomeexercisesandchecktheanswers.Step5Completethesentenceswiththecorrectformsofthewordsinthebox.ThentranslatethesentencesintoChinese,payingattentiontothedifferentmeaningsofthe-edand–ingforms.bore,excite,tire,satisfy1.WebecameexcitedwhenthinkingaboutthosebeautifullocationsinFinland.Weexpectedtoexperiencealotofexcitingthingsthere.2.Wewenttobedassoonaswearrivedatthehotelbecauseweweresotired.Theeight-hourtrainridewasquitetiring.Iwasnotsatisfiedwiththehotel.ItwasnotascleanasIhadexpected.Butwehadasatisfyingmealatthehotel'srestaurant,soIfeltabitbetterlateron.Itwasraininghardthenextday,sowejuststayedinthehotelandwatchedTV.Sadly,theTVprogramesthatdaywerereallyboring.Aswehadnothingelsetodo,wefeltprettybored.Step6Rewritethesentences.Addinformationasnecessary.Eg:Whenpeopleaskedthemanwhatthetripmeanttohim,hesaiditwas“anexperienceofalifetime”.Whenaskedwhatthetripmeanttohim,themansaiditwas“anexperienceofalifetime.”ButchartGardenswastransformedfromaquarry.Itwasnowbecomeafamousdestinationfortravellers.→Transformedfromaquarry,ButchartGardenshasnowbecomeafamousdestinationfortravellers.IfyoucompareQuebecCitywithothercitiesinCanada,itseemsmorelikeacharmingEuropeanvillage.→ComparedwithothercitiesinCanada,QuebecCityseemsmorelikeacharmingEuropeanvillage.TheydidnotknowwheretostarttheirsightseeinginLuoyang,sotheywenttotheTouristInformationCentre.→NotknowingwheretostarttheirsightseeinginLuoyang,theywenttotheTouristInformationCentre.WhentheyheardthattheSea-to-SkyHighwaywasCanada'smostscenicdrive,theymadeWestVancouvertheirfirstdestination.→HearingthattheSea-to-Sky