北師大版高中英語必修2課件Unit4Lesson 3.pptVIP

北師大高一 2 unit4 unit4cyberspace lesson3virtualreality toguessthemeaningofthewordsthroughthecontext togetthemainideaofthetext tofindthespecificinformationbyscanning whatisvirtualreality virtualrealityistheuseofcomputerswithsoundsandpicturesthatmakeyoufeelasifyouareinarealsituation 什么是虛擬現(xiàn)實(shí)技術(shù)呢 簡單地說 就是人們利用計(jì)算機(jī)生成一個逼真的三維虛擬環(huán)境 通過自然技能使用傳感設(shè)備與之相互作用的新技術(shù) 它與傳統(tǒng)的模擬技術(shù)完全不同 是將模擬環(huán)境 視景系統(tǒng)和仿真系統(tǒng)合三為一 并利用頭盔顯示器 圖形眼鏡 數(shù)據(jù)服 立體聲耳機(jī) 數(shù)據(jù)手套及腳踏板等傳感裝置 把操作者與計(jì)算機(jī)生成的三維虛擬環(huán)境連結(jié)在一起 操作者通過傳感器裝置與虛擬環(huán)境交互作用 可獲得視覺 聽覺 觸覺等多種感知 并按照自己的意愿去改變 不隨心 的虛擬環(huán)境 比如 計(jì)算機(jī)虛擬的環(huán)境是一座樓房 內(nèi)有各種設(shè)備 物品 操作者會如同身臨其境一樣 可以通過各種傳感裝置在屋內(nèi)行走查看 開門關(guān)門 搬動物品 對房屋設(shè)計(jì)上的不滿意之處 還可隨意改動 headsets glassandspecialglovesandsuitsequippedwithsensors theusercandirectlyinteractwitha3d dimension computerprogrammebymoving inside it virtualrealityholidayslearningtoflyusingvirtualrealitytechnologyplayingvirtualrealitycomputergamesvisitingvirtualmuseumsontheinternet whichoftheseusesforvirtualrealityarepossiblenow playingvirtualrealitycomputergames learningtoflyusingvirtualrealitysimulator visitingvirtualmuseumsontheinternet wouldyouliketovisitthesciencemuseumwebsite whyorwhynot wouldyouliketogotoavirtualuniversity readthedialogue ok youwillfindlotsofgoodinformationathome anddon tneedtospendtimetravelingthere wonderful studyinsuchaworld famousuniversitywithoutgoingoutofourroom readtheexplanationandspeakouttheworditexplains wordsreview 漢語是我們的母語 我們從學(xué)英語開始 就是用漢語來解釋和記憶英語的 變 用漢語解釋和記憶英語 為 用英語解釋和記憶英語 避免了將英語轉(zhuǎn)換為另一種語言 漢語所帶來的不便和時間耗費(fèi) 不但提高了效率 而且久而久之 有可能在頭腦中建立起兩種思維系統(tǒng) 即在在漢語思維之外 還可以逐步建立起獨(dú)立的英語思維系統(tǒng) 用英語解釋和記憶英語 本身就是在學(xué)習(xí)和運(yùn)用英語 對提高英語語感和英語的閱讀理解能力和綜合運(yùn)用能力很有好處 是一舉多得的好方法 真正做到了用英語品味英語 越品越有味 用英語理解英語 理解更準(zhǔn)確 鑒于本環(huán)節(jié)初次嘗試此種設(shè)置 可能有些學(xué)生對英語解釋不能完全理解 為降低難度 英文解釋后面可進(jìn)一步演示中文解釋 學(xué)生可再通過中文解釋回顧早讀課中已預(yù)習(xí)過的單詞 進(jìn)一步加深記憶 thenameofafilm book painting pieceofmusic etc n 標(biāo)題 題目 title theplacewheresomeoneisgoingorwheresomethingisbeingsentortaken adv 快 迅速地 rapidly thesoftpartofthebodyofapersonoranimalwhichisbetweentheskinandthebones orthesoftinsidepartofafruitorvegetable n 肉 肉體 flesh thedoorthroughwhichyoumightleaveabuildingorlargevehicle ortheactofleavingespeciallyatheatrestage vt 出 離開 exit connectedwiththestudyorrepresentationofthingsfromthepast adj 有關(guān)歷史的 historical toputsomethingintoabag vt 收拾行李 打包 pack toputsomethingintoaliquidforashorttime vt 浸 dip readingstrategy skimming scanning ageneralidea certaininformation titlesandheadings thefirstandlastsentencesofparagraphs thefirstandlastparagraphs picturesandcharts scanthetextforkeywordsandphrases dates etc donotneedtoreadthewholetext forgeneralideas readingcomprehensioni howmanypeoplearethereintheconversation whoarethey two cathyandtom forspecificinformation readthedialogueandtellthesentencestrueorfalse 1 thisweekendtomwillhelpcathyfinishaprojectonthehistoryoftheinternet 2 cathyismoreinterestedinvirtualholidaythantom f t readingcomprehensionii 3 tomwillhaveavirtualrealityholidaysthisweekend 4 virtualuniversityisaninterestinggameonlineinsteadofarealuniversity 5 virtualrealityholidaysspendlesstimethanrealholidays t f f 6 youneedn tgototherealplaceinvirtualrealityholidaysbutyoucangetrealfeelingoftravelingthere 7 thesciencemuseumonlinedoesn texistinfact justimagineit t f readthedialogueandanswerthequestions 1 whycan tcathygooutthisweekend shehastofinishherproject 2 whereistomplanningtogo he llgocampingiftheweatherisgood 3 doescathyhaveaprogrammefor virtual holidaysonhercomputer no 4 doesshereallythinkshewillhavethechancetogoonaworldtour no 5 whatwouldtomliketodowithvirtualreality hewouldliketogotoaworld famousuniversity 6 whyiscathysoexcitedaboutthetechnology shethoughtshewouldbeabletogoanywheresheliked readtothedialoguecarefullybetweentomandcathy andtrytofillintheblankswiththerightwords readingcomprehensioniii tom hi cathy whatareyou thisweekend cathy ihavealotofworktodo ifidon t onthehistoryoftheinternetfornextmonday slesson thescienceteacher beangry doyouhaveanythingplannedforsaturdayandsunday upto finishmyproject will tom iftheweatherisgood myfamilywill wewon tgoifitrains ifistayhome i llhelpyouwithyourprojectifyoulike cathy thanksfortheoffer tom canyousuggestanygoodbooksformyproject gocamping tom ifyougotothesciencemuseum you llfindlotsofgoodinformation cathy thanksforyoursuggestion justthink ifwehad holidays we haveanyproblemswiththeweather wewouldn thavetospendalongtimetravellingtogettoourholiday inthefuture we llbeabletousemoderntechnologytogoanywherewelike website virtualreality wouldn t destinations tom doyoumeanwe llusethe totravelaroundtheworld cathy that sright just it wewouldalsobeabletogotostudyinanyworldfamous wewantedto tom great butpersonally iprefer universitiestovirtualrealityholidays imagine universities virtual computer readthedialogue p12 carefullyandfillinthefollowingblanks gocamping thehistoryoftheinternet experience weather thesame room 1 isvirtualrealityholidayspossiblenow 2 dowehavevirtualuniversitiesnow whataretheadvantagesanddisadvantagesofavirtualuniversity wouldyouliketogotosuchauniversity why nolimittotimeandplaceitisconvenienttoattend savetransportationtime don tneedtobuytextmaterial takeyourjobasstudy advantagesofavirtualuniversity lackface to facecommunication norealexperienceofgoingtocollege can tgotoavirtualuniversitywithoutspecialequipments disadvantagesofavirtualuniversity 1 what smore wewouldn thavetospendalongtimetravellingonplanestogettoourholidaydestinations p12 分析 本句是一個簡單句 we是主語 wouldn thavetospend是謂語部分 togettoourholidaydestinations是動詞不定式短語作 狀語 sentenceexplanations 目的 句意 更重要的是 我們將不必花大量的時間乘飛機(jī)去目的地 仿寫 更重要的是 如果我們有自己的車的話 我們將不必花如此多的錢乘出租車上下班 what smore wewouldn thavetospendsomuchmoneyontaxistogettoworkandcomebackhomeifwehadourowncar 2 wewouldnotonlybeabletotravelaroundtheworld butalsogotostudyinanyworldfamousuniversitieswewantedto p12 分析 本句是一個主從復(fù)合句 在主句中 notonly butalso 連接兩個并列謂語 wewantedto是定語從句 修飾先行詞 從句中省略了關(guān)系代詞which that和studyin 完整的從句應(yīng)該是which thatwewantedtostudyin universities 注意 當(dāng)notonly butalso 連接兩個并列的成分作主語時 后面的謂語通常跟鄰近的主語保持一致 如 notonlymyfriendsbutalsoiamgoingtoamerica 當(dāng)notonly位于句首時 句子常采用部分倒裝語序 如 notonlydoesthesungiveuslightbutitalsogivesusheat 句意 我們不僅可以周游世界 而且可以進(jìn)入任何一所我們想去的世界知名大學(xué)學(xué)習(xí) 仿寫 我們不僅可以負(fù)擔(dān)起一所帶游泳池的房子 而且還可以去我們一直想去的城市旅游 wewouldnotonlybeabletoaffordahousewithaswimmingpool butalsogoonholidaytothecitywherewealwayswanttogo ifidon tfinishmyprojectonthehistoryoftheinternetfornextmonday slesson thescienceteacherwillbeangry ifistayhome i llhelpyouwithyourprojectifyoulike ifit sgood dad mumandiwillprobablygocamping ifyougotothesciencemuseumwebsite you llfindlotsofgoodinformation sentencesfromthisunit havealook totestyoursenseofobservationtotestyourabilityofshort termmemorytotestyourabilitytohighlightthelanguagepoints guessinggame ifidon tfinishmyprojectonthehistoryoftheinternetfornextmonday slesson thescienceteacher be angry ifistayhome i help youwithyourprojectifyoulike ifit sgood dad mumandi probably go camping ifyou go tothesciencemuseumwebsite you llfindlotsofgoodinformation fillintheblanks willbe willhelp go will go 條件狀語從句 歸納 條件狀語從句包括真實(shí)條件句和虛擬條件句兩種 真實(shí)條件句1 第一種類型的真實(shí)條件句可用于以下三種情況 表示普遍真理和客觀事實(shí) 如 ifwaterfreezes itturnsintoice 表示現(xiàn)在的習(xí)慣動作 如 ifmygrandpagoestothepark heusuallytakeshisviolinwithhim 表示過去的習(xí)慣動作 如 ifiwenttoafriend sparty iusuallytookabottleofwine 2 第二種類型的真實(shí)條件句可用于以下兩種情況 表示現(xiàn)在或?qū)碛锌赡馨l(fā)生的事 if從句用一般現(xiàn)在時或現(xiàn)在完成時 主句用一般將來時或 情態(tài)動詞 動詞原形 如 ifyoufinishworkearly we llgoforawalk ifyouhavefinishedyourcoffee wecanpaythebill 表示提出建議或請求 if從句用一般現(xiàn)在時 主句為祈使句 如 ifyou reill seeadoctor 虛擬條件句1 虛擬條件句表示與現(xiàn)在事實(shí)相反的假設(shè)或現(xiàn)在不可能存在的狀態(tài) 此時 if從句的謂語用動詞的過去式 be的過去式多用were 主句謂語用 would should could might 動詞原形 如 ifihadaprivateplane iwouldflyroundtheworld ifiwereyou iwouldtakeanumbrella 2 虛擬條件句表示與將來事實(shí)可能相反 將來不可能發(fā)生的事 此時 if從句的謂語用動詞的過去式 be多用were 主句謂語用 would should could might 動詞原形 如 ifiweretocometomorrow imighthavetimetoseeyou ifwecaughttheearlytrain wecouldgettherebylunchtime did were would could might shoulddo haddone would could might shouldhavedone didshoulddoweretodo would could might shoulddo 虛擬語氣在條件從句中的用法 readthesentencesinitalicsinthefirstseventeenlinesofthedialogue arethesentencesusedtotalkabout unlikelysituationsinthefuture possiblesituationsinthefuture ifidon tfinishmyprojectonthehistoryoftheinternetfornextmonday slesson thescienceteacherwillbeangry 2 ifit sgood dad mumandiwillprobablygocamping 3 wewon tgoifitrains b b b 4 ifistayhome i llhelpyouwithyourprojectifyoulike 5 ifyoutellmesometitles i lllookfortheminthelibrary 6 ifyougotothesciencemuseumwebsite you llfindlotsofgoodinformation b b b writethesesentencesasfirstconditionals puttheverbsinbracketsinthecorrectform 1 what do ifyourcomputer notwork whatwillyoudoifyourcomputerdoesn twork 2 yougo outwithmeonsaturdaynightifyou finish theproject willyougooutwithmeonsaturdaynightifyoufinishtheproject 3 ifyou go tothatwebsite you find someinterestinginformation ifyougotothatwebsite you llfindsomeinterestinginformation 4 yougo tothatconcertifit rain willyougotothatconcertifitrains 5 she buy acomputerifshe get thatjob she llbuyacomputerifshegetsthatjob 6 i give youtheinformationifyou telephone metomorrow i llgiveyoutheinformationifyoutelephonemetomorrow 7 what youdo iftheweather notbe goodtomorrow whatwillyoudoiftheweatherisn tgoodtomorrow 8 mysister notgo tolondonifshe notpass herexams mysisterwon tgotolondonifshedoesn tpassherexams readthesentencesanddecidewhatthepeopleareexpressing ifwehadvirtualrealityholidays wewouldn thaveanyproblemswiththeweather iftheyinventedvirtualrealityholidays i dgoonanaround the tour unrealistichopesforhefutureplansforthefuturesomethingthatisn tpossiblenow ifi win thelotteryof1millionpound i buy anexpensivecar won wouldbuy completethesentencesbelow ifi have alotofmoney i buy avilla 別墅 had wouldbuy ifi be abird i travel aroundtheworld were wouldtravel ifi learn howtoswim hadlearnt i nottrap onthisisland wouldnothavebeentrapped 1 ifihadthemoney iwouldbuyanewibmcomputer a astudentb amillionaire2 ififeltill iwouldstopsmoking a asmokerb anon smoker3 ifiwereateacher iwouldbepopularwithmystudents a ateacherb ajournalist whowouldsaythesethings aorb usethecuesbelowtowritesecondconditionalsentences 1surftheinternet findinterestinginformation2nothaveatry laughat3takepartinthegame winthegame4tellthepolice helpyoutogetoutoftrouble5makenewfriends usetheinternet 1ifisurfedtheinternet iwouldfindinterestinginformation 2ifididnothaveatry youwouldlaughatme 3ifitookpartinthegame iwouldwin 4ifyoutoldthepolice theywouldhelpyougetoutofthetrouble 5iwouldmakenewfriendsifiusedtheinternet whichplaceintheworldwouldyouliketogoto writeaconditionalsentenceabouttheplacesbelowandthreeotherplacesofyourchoice exampleifiwenttoitaly iwouldgoandseetheleaningtowerofpisa egyptparislondoncanadaitalysydneybeijingxi an imagineyourtravel ifiwenttobeijing ifiwenttoegypt ifiwentto