高一英語必修2第三單元教案高一英語必修2第三單元教案篇一：高中英語必修二第三單元導學案高一英語必修二導學案Unit3Computers知識目標：Topic：Informationtechnology;historyandbasicknowledgeofcomputers;robotsNewwords:calculateuniversal,simplify,sum,operator,logical,logically,technologyrevolutionartificialintelligenceintelligentsolverealitypersonalpersonallytubetotaltotallynetworkwebapplicationfinancemobilerocketexploreanyhowgoalhappinessdownloadvirussignaltypecoachariseelectronicappearancecharactermopnicePhrases;from?on；asaresult；so...that，humanrace；inaway；withthehelpof；dealwith；watchoverSentencepatterns;1makingdecisionsIthink/Idon?tthinkthat?Ibelievethat?I?vedecidedthat?Let?sdecide?let?smakeadecision2ReasoningTheadvantage/disadvantageis?Iagree/don?tagree?because?Givemeyourreasons:First??second.Whatmakesyouthinkso?As/since??,Ithink??Grammar:現(xiàn)在完成時態(tài)被動語態(tài)的建構和用法OvertimeIhavebeenchangedquitealot.FirstasaPCandthenasalaptop,Ihavebeenusedinofficesandhonessincethe1970sSincethe1970smanynewapplicationshavebeenfoundformeIhavealsobeenputintorobotsandusedtomakemobilephonesaswellashelpwithmedicaloperations能力目標：讓學生學習用英語表達自己的觀點并進行簡單的理由闡述及做出決定，并能按時間先后順序來描述某事。情感目標：通過本單元的學習，使學生了解計算機的發(fā)展歷程及其在當今社會的廣泛應用；明確高科技在當今社會發(fā)展和國際競爭的重要地位，從而激發(fā)其熱愛科技，奮發(fā)進取的決心，時刻準備用自己的知識為祖國服務。課時安排：本單元教學可分為10課時第一課時：NewwordslearningWarmingup第二課時：Warming—up;Pre-reading第三課時：reading;comprehending;第四課及第五課時：languagepoints.LearningaboutLanguage(usefulwordsandexpressions)第六課時：Learningaboutlanguage(discoveringusefulstructures);Grammar第七課時：SpeakingandReading第八課時：Writing第九課時：RevisionandExercises第十課時：TestUnit3ComputersThefirstperiodNewwordsandexpressions學習目標：1.知識和技能：重點單詞和詞組,注意單詞的發(fā)音掌握本單元的和重讀。2.情感態(tài)度和價值觀：為本單元其他課時的學習做好鋪墊，擴大詞匯量。3.過程與方法：1）.音節(jié)拼讀，準確讀詞。2）.多詞連讀，朗朗上口。3）.手指中文，看中讀英。4）手指英文，看英想中.課前自主學習：寫出下列單詞的同源詞⑴calculatorn.計算器：___________________(vt)___________________(意義)⑵universen.宇宙：___________________(adj)__________________(意義)⑶simpleadj.簡單的：___________________(vt)__________________(意義)⑷operatevi.手術vt.操作：_________________(n.)__________________(意義)________________(n?的人)________________(意義)⑸logicaladj.合邏輯的：___________________(adv)__________________(意義)⑹technologyn.工藝；科技：___________________(adj)__________________(意義)⑺revolutionaryadj.革命的：____________________(n)_________________(意義)⑻intelligentadj.智能的____________________(n)___________________(意義)adj.真實的____________________(n)___________________(意義)：：⑼real⑽personn.人：___________________(adj)__________________(意義)⑾totaladj.總的；整個的：_______________(adv)__________________(意義)⑿applyv.申請：____________________(n)___________________(意義)⒀anyhowadv.無論如何;即使如此：_________________(同義詞)⒁signn.征兆；符號：___________________(v)___________________(意義)出現(xiàn)；顯得：____________________(n)_________________(意義)特性；個性：⒂appearv.⒃charactern.________________(adj)___________________(意義)學習過程：一、Checking.Checktheirhomework.二、Reading(A級)1.Readthewordsandexpressionsbyyourself.(Payattentiontothepronunciation)2.Readthewordsandexpressionstoyourpartners.Checkingthepronunciationeachother.3.Readthewordsandexpressionsaftertheteacher.三、.Wordsandexpressions(B級)1.識記詞匯⑴___________解決；解答⑵___________探索；探測；探究⑶___________下載⑷___________出現(xiàn)；發(fā)生⑸___________人造的；假的⑹___________病毒2.識記詞組⑴______________從?時起⑵_____________結果⑶_____________如此?以至⑷______________在某種程度上⑸_____________在?的幫助下⑹______________處理，對付⑺_____________監(jiān)視；看守四.Usingwordsandexpressions(C級)1.根據(jù)句子的結構和意義，在空格處填入一個恰當?shù)膯卧~，或者用括號中所給的適當形式填空。1.Withthedevelopmentofscienceand___________,peoplewillliveahappierlife.2.IQ(智商)standsfor___________quality.3.Thecaptainhadan___________leg,madeofwood.4.Englishisa_____________language,sowehavetolearnit.5.Wewillsoonarriveatthepointwherewecanfindalltheknowledgeofhumankindonacomputer_____________(網(wǎng)絡).教師二次備課及教學后記：Unit3ComputersThesecondperiodWarmingupandPre-reading學習目標：1知識與技能：1）Readallthenewwordsandphrases,payingattentiontothepronunciationandstress2）talkaboutthedevelopmentofcomputers3)mastertheuseofsomewords.2過程與方法：discussion；talkinganddoingexpressions3.情感態(tài)度與價值觀:gettoknowthehistoryofthedevelopmentofcomputers.課前自主學習：一、英漢互譯：1__________adj.共同的2___________n.發(fā)展3__________n.計算機4_____________n.機器人5calculatorn._________6.laptopn.__________7abacusn.___________8thedevelopmentofcomputers___________9和??有共同之處________________________10比較_____________11.puttheminanorder___________________12.根據(jù)他們出現(xiàn)的時間________________________二、根據(jù)句意及首字母提示補全單詞1.Thetwinshavealotinc____________2.The______________(develop)oftheinformationtechnologywasthegreatestadvanceofthe20thcentury.3.Ourmathteacheraskedallofustobuyc____________4.Ana__________isacalculatingtoolfordealingwithfiguresinancientChina.學習過程一、Revision1）Readthenewwordsandexpressionsaftertheteacher.2）Checktheirhomework.二、Warmingup---lookatthepicturesandthesentencestoguesswhatitis.①AnoldcalculatingmachineusedinChinauntilnow._____________②Itisanewcalculatingmachinewhichcansolvealargenumberofmathematicalproblems._____________③Itisbuilttosolvesomemathematicalproblems.Butitistoobig.___________④Itisacomputerwhichcansolveallkindsofproblemsandisusedwidelynow._____________⑤Itisakindofcomputerwhichcanbetakenconveniently(方便).三、Pre-readingCanyouputtheseinventionsinanorderaccordingtothetimewhentheyappeared?()Analyticalmachine（分析機）()Laptop()Universalmachine（通用機器）()Calculatingmachine（計算機器）()Robot／android()PCPleasechecktoseeifyouwererightafterreadingthepassage!四、languagepointshavealot/much/little/something/nothingincommonwith有許多/幾乎沒有Whatdothetwopictureshaveincommon?這兩個圖片之間有?他們彼此毫無共同之處/一些/沒有/共同之處什么共同之處.commonpeople老百姓，普通人commonsense常識commonknowledge總所周知的事commoninterest共同的興趣近義詞辨析：common多表示共有的特征.normal多表示”普通的”指符合或具有全體所;常見的;共有的”標準的;正常的”強調(diào)在正常范圍內(nèi).ordinary多表示”普通的;平淡無器奇的”,強調(diào)無特別之處.usual多表示”習慣性的;遵守常規(guī)的”general多表示”公眾的;普遍的”1)Ithasbecomea___________flower.Youcanfindithereandthere.(common)2)Itis_______tostartaspeechbyintroducingoneself.(usual)3)Althoughshewasrich,shewasalwaysin_________dress.(ordinary)4)The__________temperatureofhumanbodyis37.(normal)5)The____________publicbelievedthatitwasunfairtorefuseadisabledyoungmantodothejob.(general)6)Ihaven?tathing____common____myfather.(B)A.in,aboutB.in,withC.on,ofD.with,in本句中的doyouthink為插入語，插在特殊疑問句的中間，前后不必用逗號隔開，除think外，作插入語的動詞有believe,imagine，suppose，suggest，consider,say,suggest等。注意：1)疑問句在句中作主語時，將插入語放在疑問詞后謂語動詞前，其他不變，如將插入語撤走，原句式部變。E.g.Whodoyouthinkatethecake?2)疑問詞在句中不作主語，將插入語放在疑問詞后，think其他成分要成為的賓語從句，即要用陳述句語序。E.g.Whydoyouthinkshewaslateagain?拓展：常見得插入語還有：Ithink,Ihope,Iguess,I?mafraid,Ibelieve,youknow,yousee等。這些插入語常E.g.Thediet,Ithink,willdogoodtoyourhealth.1._______besenttoworkthere?用逗號分開。A.WhodoyousuggestB.WhoyousuggestthatshouldC.DoyousuggestwhoshouldD.Doyousuggestwhomshould2.---Wehaven?theardfromJaneforalongtime.---Whatdoyousuppose_______toher?A.washappeningB.tohappenC.hashappenedD.havinghappened3._______isgoingtomarryLily?A.WhodoyouthinkB.DoyouthinksoC.WhoyouthinkD.Doesyouthinkwho教師二次備課及教學后記Unit3ComputersThethirdperiod:Reading;Comprehending教學目標：1.知識與技能：(1)Getthestudentstolearntheusefulandexpressionsinthispart.(2)Letstudentstolearnabouthistoryandbasicknowledgeofcomputers.(3)Developstudents'readingabilitiesandletthemlearndifferentreadingskills.2.情感態(tài)度與價值觀Arousestudents'greatinterestinlearningcomputersandletthemlearntousethecomputersintheirdailylives.3.過程與方法(1).Task-basedteachingandlearning(2).Cooperativelearning(3).Discussion4.Teachingdifficultandimportantpoints(1).Letthestudentslearnmoreabouthistoryandbasicknowledgeofcomputers.(2).Getthestudentstolearndifferentreadingskills.課前自主學習：一、將下列詞組或短語譯成中文或英文。1.from?on_____________________2.asaresult______________________3.So?that_________________________4.inaway________________________5.aswellas___________________7.astimegoesby___________________9.in/duringthe1970s_______________10._______________________技術革命11.______________________解決問題12.______________________人工智能13.______________走過；過去14.______________________與??信息共享15._________________________為人類提供高品質(zhì)的生活二、重點句型。1Iwasdevelopedveryslowlyand_______________________________________IwasbuiltasananalyticalmachinebyCharlesBabbage.2.___________________________,Iwasmadesmaller.3._________mymemoryhasdeveloped_____much____,likeanelephant,Ineverforgetanything_____________________.Teachingprocedures:高一英語必修2第三單元教案篇二：高中英語必修二第三單元重點高中英語必修二第三單元重點、難點UnitThreeComputers1、Inpairsdiscusswhattheyhaveincommon.同桌討論一下他們有什么共同之處。commonadj.&n.（1）共同的，常見的You’vemadeacommonmistakeagain.你又犯了個常見錯誤。（2）共同的；公用的Parksarecommonpropertytothecity’speople.城市的公人的公共財產(chǎn)。聯(lián)想擴展：have?incommon有共同之處園是這個城市的Mysonhasnothingincommonwithme.我兒子和我沒有一點共同之處。commonground共同利益commonknowledge人所共知的事commonsense常識易混辨析：common,usual,ordinary,average普通，通常common所有人或事物所共有的，常見的usual由過去的經(jīng)驗可判斷為正?；蛲ǔ?，是按照預測發(fā)生的。ordinary與一般實物的，普通的?！傲曇娏暵劇?。標準、品德、習俗相同，平凡而不特殊，強調(diào)平淡無奇。average指達到平均水平，不突出。即時活用：用common,usual,ordinary,general填空。1、Thisbirdlooks______.2、Anyonewhohas______sensecan’tdoit.3、LaoLicameearlyas______.4、Heisofthe______height.答案：1、ordinary2、common3、usual4、average2、IbeganasacalculatingmachineinFrancein1642.1642年我在法國誕生時是一臺計算機器。beginas作為?開始；以?起步Thebandbeganasagroupofmusiclovers.那個樂隊一開始只是一群音樂愛好者。Thepoliticalleaderbeganasacarpenter.那位政治領導人是從一個木匠起步的。聯(lián)想擴展：beginat?從?開始beginwith以?開始tobeginwith首先3、AfterIwasprogrammedbyanoperatorwhousedcardswithholes,Icould“think”logicallyandproduceananswerquickerthananyperson.在操作員用穿孔卡為我設計程序之后，我能夠進行邏輯“思考”，并且能夠比任何人更快的算出答案。producevt.用法歸納：（1）生產(chǎn)ThatfactoryproducescarsnamedBiYadi.那個工廠生產(chǎn)比亞迪汽車。（2）產(chǎn)；出Howmanyeggsdidyourhenproducethisweek?你那只母雞這個星期產(chǎn)了幾個雞蛋？Thatcenturyproducedmanygreatmen.那個世紀出了許多偉人。（3）引起；造成Hardworkproducessuccess.努力工作就能成功。（4）演出；上演Theyproducedanewplaylastweek.上星期他們演了一部新戲。（5）假裝Heproducedasmileonfacewhenhesawme.看到我時他臉上裝出微笑。聯(lián)想擴展：producern.生產(chǎn)者productn.產(chǎn)品；產(chǎn)物productionn.產(chǎn)量productiveadj.多產(chǎn)的4、AsaresultItotallychangedmyshape.結果我完全改變了體型。asaresult結果AsaresultIlostmyjob.結果我失去了工作。聯(lián)想擴展：asaresultof..由于?的結果AsaresultofthesnowIcamelateforschool.由于下雪我上學遲到了。特別提示：asaresult和asaresultof..都用于引導狀語從句。asaresult后不跟賓語，后面可以用逗號，也可以不用逗號；而asaresultof..后必須跟賓語。5、IwasabletosharemyknowledgewithothersthroughtheWorldWideWeb.我能夠通過萬維網(wǎng)和其他人分享我的知識。用法歸納：（1）分享；分擔Goodfriendsshouldsharebothjoysandsorrows.好朋友應該分享快樂，分擔痛苦。（2）合用ThetwoeconomistssharedtheNobelEconomicPrizethisyear.兩位經(jīng)濟學家共同獲得今年的諾貝爾經(jīng)濟學獎。（3）共同具有Thetwobrotherssharethesametasteandinterests.兄弟倆品位相同，興趣相同。聯(lián)想擴展：share還可以作名詞。表示①一份東西②一份責任③股份Thisisyourshare,pleasetakeitaway.這是你的那份，請拿走。Ihavenoshareinthatmatter.我與那件事情沒關系。Ihold1000sharesofthatcompany.我有那個公司1000股股份。即時活用：1、Goodfriendsshould______happinessandsorrowswitheachother.A.spareB.shareC.enjoyD.know2、LetHarryplaywithyourtoysaswell,Clare---youmustlearnto_______.A.supportB.careC.spareD.share答案：BD6、Anyhow,mygoalistoprovidehumanswithalifeofhighquality.不管怎么說，我的目標是為人類提供高品質(zhì)的生活。providevt.&vi.用法歸納：（1）提供Thetreesprovideshade.樹提供陰涼。特別提示：表示“給?提供?”用“providesth.forsb.”。Schoolsprovidetext-booksforstudents.學校為學生提供教科書。（2）規(guī)定Schoolrulesprovidethatstudentsmustn’tsmoke.校規(guī)規(guī)定學生們不能吸煙。聯(lián)想擴展：provideagainst預防WeallshouldprovideagainstthespreadofH1N1flu.我們都應該預防甲型流感的傳播。providefor養(yǎng)活；做準備Heworksdayandnighttoprovideforhisfamily.他不分晝夜的工作養(yǎng)活家人。provide?with給?提供Hisfirmisgoodandprovideshimwithacar.他的公司不錯，給他提供了一輛車。provided/providingconj.如果?話；只要Providedthatitwillsnowtomorrow,wewillputoffthesportsmeeting.如果明天下雪，我們就推遲運動會。特別提示：provided和providing都用于作狀語。provided多用于正式文體；providing多用于口語。即時活用：1、Theyliveontheirsmallfarm____thefamilywithcorn.A.providingtoB.providedC.providingD.providedto2、Asweallknow,twothirdsoftheearth’ssurfaceiswater,___alotoffish.A.providedB.providingC.whichprovidesD.itprovides答案：CB7、I’mpartofanandroidfootballteam.我是一個機器人足球隊的成員。part在這里指“成員”。part當“成員；作用；責任”講時是不可數(shù)名詞。Weareallpartofthisbigfamily.我們都是這個大家庭的成員。part還可作可數(shù)名詞，表示“部分；地區(qū)；零件；角色”。Iwanttobuysomesparepartsformycar.我想給我的汽車買些備件。ItissnowinginmanypartsofChinathesedays.這幾天中國的很多地區(qū)在下雪。聯(lián)想擴展：forone’spart就?來說forthemostpart大部分；通常inpart部分的；某種程度上playa?partin起?作用takepartin參加takethepartof支持；擔任?角色8、Wearedeterminedtocreateanevenbettersystem.我們決心要建立一個更好的系統(tǒng)。determinevt.用法歸納：（1）決定Westillcan’tdeterminethedateforthemeeting.我們還是不能決定開會的日期。（2）決心；決意IhavedeterminedtostudyEnglishwell.我決心要把英語學好。特別提示：determine表示“決心；決意”時，后面多跟不定式、從句或on/upon構成的（3）決心；下定決心（用過去分詞）A.bedeterminedtodo?Hewasdeterminednottotellothersthesecret.他決心不把這B.bedeterminedthat?IamdeterminedthatIwillnotteach短語。個秘密告訴別人。them.我決心不教他們。C.用過去分詞作狀語Ilefttheshop,determinednevertosetfootinitagain.我離開那個商店，決心不再踏進它半步。9、Inawayourprogrammerislikeourcoach.從某個方面講，我們的程序設計師就好像是我們的教練。ina/oneway從某種程度講；就某個意義來說Yourcompositionisgoodinaway從.一個方面看，你的作文還不錯。InonewayIlikethefilm.從某種程度講，我喜歡這部電影。聯(lián)想擴展：alltheway全程；一直bywayof取道；經(jīng)由inanyway在任何方面ineveryway在各方面innoway一點也不intheway擋路；礙事loseone’sway迷路makeone’sway去/往某地onthe/one’swayto在去?的路上bytheway順便問一下即時活用：1、Couldyoukeepsilentafewminutes,please?Youarehere_______.A.inawayB.onthewayC.inmywayD.bytheway2、Itwassoeasyand_______soreasonable.A.inawayB.inthewayC.inthiswayD.bytheway答案：CA10、InthiswayIcanmakeupnewmovesusingmy“artificialintelligence”.以這種方式，我就可以用我的“人工智能”編造新的移動程序。inthisway以這種方法wayn.方式；方法用法歸納：（1）+todoHaveyouthoughtoutawaytosolvetheproblem?你想到解決這個問題的辦法沒有？Weshouldfindawaytopreventthisflu.我們應該找出一個辦法防止這種流感。特別提示：way+todo表示辦法、方法還沒有使用。（2）+ofdoingTheyoungteacherinventedastrangewayofmakinghisclasseslivelyandinteresting.那個年輕的教師創(chuàng)造了一種奇特的辦法能使他的課堂活潑有趣。Walkingisanicewayofdoingexercise.散步是一種鍛煉的好辦法。特別提示：wayofdoing表示辦法已經(jīng)在使用。（3）+從句Idon’tlikethewayyouspeaktoyourparents.我不喜歡你對父母說話的方式。Readerslikethewayhewrites.讀者喜歡他的寫作風格。特別提示：way作先行詞時，定語從句可用that/which/inwhich引導，也可以省略關系詞。聯(lián)想擴展：means也可表示“方式；方法”。但means前用介詞復數(shù)形式；means被everyby。另外，means被all修飾時，謂語用或each修飾時，謂語用單數(shù)形式。即時活用：1、Whatwayareyouthinkingof______ridoftheflies?A.togetB.gettingC.beinggotD.tobegetting2、Thewaysyouthoughtof_____theworkarereallygoodforthebeginners.A.doingB.todoC.indoingD.did3、–Willthechildrecover?---Rightnow,thereisnoway__________.A.forknowingB.tohaveknownC.ofknowingD.tobeknown4、Everymeans________,butnoneproved_______.A.havetried;successfulB.hasbeentried;successfulC.hastried;tobesuccessfullyD.havebeentried;successfully5、Hehadastrange____ofmaking/tomakehislessonslivelyandinteresting.A.meanB.meansC.wayD.method答案：ABCBC11、InthiswayIcanmakeupnewmovesusingmy“artificialintelligence”.以這種方式，我就可以用我的“人工智能”編造新的移動程序。makeup用法歸納：（1）編造Canyoumakeupasentencewith“makeup”?你能用makeup造個句子嗎？Don’tmakeupanexcusetome.別對我編借口。（2）組成；構成England,Scotland,IrelandandWalesmakeupGreatBritain.英格蘭、蘇格蘭、愛爾蘭和威爾士組成大不列顛。Fiftystudentsmakeupourclass.五十個學生組成我們班。易混辨析：makeup;makeupof和consistof都表示成”。用makeup時，個“組成；構體在前，整體在后，句子用主動。用makeupof時，整體在前；個體在后，句子用被動。GreatBritainismadeupofEngland,Scotland,IrelandandWales.英國由英格蘭、蘇格蘭、愛爾蘭和威爾士組成用consistof時，整體在前，個體在后，句子用主動。GreatBritainconsistsofEngland,Scotland,IrelandandWales.英國由英格蘭、蘇格蘭、愛爾蘭和威爾士組成（3）彌補Studentsmustmakeupthelessontheymissed.學生們應該把落下的課補上。（4）化妝；打扮Youhaveonlytenminutestomakeup.你只有十分鐘打扮。聯(lián)想擴展：(1)makeof+材料由?制成（能看出材料或者是物理變化）Thisdeskismadeofwood.這張桌子是木頭做的。（2）makefrom+材料由?制成（看不出材料或者是化學變化）Paperismadefromwood.紙是木頭造的。（3）makeinto+成品制成?Youcanmakethispieceofwoodintoadesk.你可以把這塊木頭做成一個桌子。（4）makeoutof?由?制成Theboy’scoatismadeoutofhisfather’s.那個男孩的大衣是由他爸爸的大衣改成的。（5）makeupfor彌補Youcan’tmakeupthetimelost.丟失的時間是不能彌補的。makeaface/faces做鬼臉；扮苦相makeafoolof捉弄makefunof取笑makethemostof充分利用makethebestof充分利用makeout明白；理解;書寫；開列makeanoise吵鬧makesure確保makeacontributionto對?做貢獻makeamistake出差錯makeupof由?組成makeit辦成；做到；成功；趕上makeof理解；由?制造makeupto接近；巴結；向?求婚makeupfor彌補makeover把（財產(chǎn)）轉讓makeaway離去；逃走makeawaywith攜?而逃；浪費makefor走向；沖向makeoffwith攜?而逃makedown改?。ㄒ路﹎akeoutof用?制造即時活用：1、Thiskindofclothismade______cottonandthiskindofwineismade______rice.A.of;ofB.from;fromC.of;fromD.from;of2、Peter’scoatismade______silkwhilehisbrother’sismade______hisfather’s.A.of;outofB.from;upofC.outof;outofD.outof;from3、Thosewhodidn’tworkhardinthepastaredeterminedto______forthelosttime.A.makeupB.makeoutC.makeendsmeetD.makebelief4、Thejudgingcommittee(評委會)______threewomenandfourmen.A.isconsistedofB.makesupC.consistsofD.ismakeup答案：CAAC12、Iwouldreallyliketoplayagainstahumanteam,forIhavebeenprogrammedtoactjustlikethem.我真的想和人類組成的對踢一場球，因為我的程序被設計成像他們一樣活動。forconj.由于；因為Thedaysareshort,foritiswinternow.由于現(xiàn)在是冬天，白天很短。Shemusthavegoneoutearly,forIdidn’tseeheratbreakfast.她一定很早就出去了，我在吃早飯時沒看到她。易混辨析：because,since,as,for由于，因為Because（1）because為從屬連詞，引導原因狀語從句，表示直接而明確的原因或理由，語氣最強；所引導的從句可放在主句之前，也可放在其后，但后者居多。Jennydidn’twanttodothatbecauseherparentswereverystrictwithher.詹尼不想做那件事，因為她父母對她要求很嚴。特別提示：為了加強語氣，because前還可以加某些副詞，如only,just,simply等。Hedidn’tanswermyquestiononlybecausehecouldn’t.他沒有回答我的問題只是由于他不會。(2）because能回答why的提問。(3)because引導的從句可以調(diào)句型。Itisbecauseheis用于強illthatheisabsent.他缺席是由于他病了。Since和asSince和as引導的從句強調(diào)結果，不強調(diào)原因，因此，它們引導的從句一般放在句首。Since比as語氣強，表示自然的因果關系，常被譯為as表示的原因語氣中，講話人認為某“既然”。最弱，常用于日常談話種理由很明顯或對方很熟悉，不需要強調(diào)。Sincethetwochildrenwerebroughtupinthesouth,theyhaveneverseensnow.由于兩個小孩都是在南方長大，他們從來沒看到過雪。Asitwasgettingverylate,wesoonturnedback.由于天快要黑了，我們很快就回家了。For并列連詞for常被譯為“因為”，但它并不說明原因，只表示一種附帶的或補充的解釋或說明，或者表示一種推理；for引導的從句不能放在句首。Wemuststartearly,forwehavealongwaytogo.我們必須早點出發(fā)，應為我們有很長的路要走。即時活用：1、______itissnowingtoday,you’dbetterwalktoschool.A.BecauseB.SinceC.AsD.For答案：C13、Thismeansthatitshouldcleanthehouse,mopthefloors,cookthedinneranddealwithtelephonecalls.這就是說它應該打掃房子，拖地，做飯并且處理來電。dealwith用法歸納：(1)對付；對待;打交道Hedealsfairlywithallpeople.他能和所有人打交道。Idon’tknowhowtodealwiththesebadchildren.我不知道怎樣來對付這些壞孩子。特別提示：dealwith表示“對付；對待”時，要和how連用。而dowith表示“對付；對待”時，要和what連用。(2)處理Iwilldealwiththeproblemnow.我現(xiàn)在就來處理這個問題。Yougetintothetrain,Iwilldealwiththebags.你上火車，我來處理包。(3)論述Botanydealswiththestudyofplants.植物學主要論述對植物的研究。Thesenovelsdonotdealwithreality.這些小說沒有敘述現(xiàn)實。(4)和?做買賣Iwillnotdealwiththisshopagain.我再也不來這個商店買東西了。Ionlydealwithschools.我們只和學校做買賣。即時活用：1、Theydon’tknow___theoldmachinesintheircompany.A.todealwithB.dowithC.howtodealwithD.howtodowith2、Thisisthebook_____withtheworldpopulation.A.dealingB.dealtC.tobedealtD.beingdealt3、Thatmanisdifficult_________.A.dealingB.dealtwithC.todealwithD.tobedealtwith答案：CAC14、Itshouldalsowatchovermynaughtyniece,whocomestomyhouseveryoften.它還要照看我淘氣的侄子，他常到我家來。watchover照看；看守；負責Theboyiswatchingoverthesheep.那個男孩在照看羊群。Someengineersareappointedtowatchovertheproject.一些工程師被任命來監(jiān)理這項工程。聯(lián)想擴展：watchfor小心等候watchone’sstep小心watchout當心；注意wa