人教版高中英语教案选修六Unit4GlobalwarmingPeriod3

1Period3Grammar—theUseof“It”(2)整体设计教学内容分析Thisteachingperiodmainlydealswiththegrammar：theuseof“it”．“It”hasmanyusagesintheEnglishlanguage.“It”canbeusedasapronounandtheformofsubjectandobject，andbeusedtoexpressemphasis.FromUnit3weknowthat“it”canbeusedasapronounandtheformofsubjectandobject.Inthisunitwewilllearnthat“it”canbeusedtoexpressemphasis.Thiskindofsentenceiscalledemphasizedsentences.Itsmainformis“Itis/was...that/who...”，whichisaveryusefulsentencepattern.三维目标设计Knowledgeandskills1．Togetthestudentstoknowthestructureoftheemphasizedsentences.2．Toletthestudentslearntheusagesoftheemphasizedsentences.3．Toenablethestudentstousetheemphasizedsentencescorrectlyandproperly.Processandmethods1．Toaskthestudentstoreadthereadingpassageagain，pickouttheemphasizedsentencesfromthereadingpassageandtranslatethemintoChinese.2．Toaskthestudentstodiscoverthestructureandusagesoftheemphasizedsentencesbycomparingalotofexamplesentences.3．ToaskthestudentstodotheexercisesinDiscoveringusefulstructuresonPage29tomastertheemphasizedsentences.4．Toaskthestudentstosummarizetheusagesoftheemphasizedsentences.5．ToaskthestudentstodotheexercisesinUsingStructuresonPage64andsomeotheradditionalexercisesforconsolidation.Emotion，attitudeandvalue1．Togetthestudentstobecomeinterestedingrammarlearning.2．Todevelopthestudents'abilityofcomparingandsummarizing.教学重、难点1．Togetthestudentstomasterthestructureandusagesoftheemphasizedsentences.2．Toenablethestudentstolearnhowtousetheemphasizedsentences.教学过程1Revision1．Checkthehomeworkexercises.2．Dictatesomenewwordsandexpressions.2WarmingupAskthestudentstocomparethetwosentencesbelow.Thesecondsentenceisfromthereadingpassage.TranslatethemintoChineseandthendiscussanydifferenceinmeaningandform.Askthestudentstoexplainwhy“it”isusedinthesecondsentence.Humanactivityhascausedthisglobalwarming.It_ishumanactivity_thathascausedthisglobalwarming.Tellthestudentstherearetwomoresentencesinthetextinwhich“it”isusedforemphasis.Findthemandthenwritethemdown.2________________________________________________________________________________________________________________________________________________Suggestedanswers：1．It_wasascientistcalledCharlesKeeling，whomadeaccuratemeasurementsoftheamountofcarbondioxideintheatmospherefrom1957to1997.2．...it_istheburningofmoreandmorefossilfuelsthathasresultedinthisincreaseincarbondioxide.ep3GrammarlearningAskthestudentstostudythefollowingsentencesandtrytosummarizethestructureoftheemphasizedsentences.Tomfoundmypenintheclassroomyesterday.ItwasTomwho/thatfoundmypenintheclassroomyesterday.ItwasmypenthatTomfoundintheclassroomyesterday.ItwasintheclassroomthatTomfoundmypenyesterday.ItwasyesterdaythatTomfoundmypenintheclassroom.4SummingupTrytohelpthestudentsdrawthefollowingconclusions.1．Themainstructureoftheemphasizedsentencesis“Itis/was...that/who...”．2．Theemphasizedsentencescanbeusedtoemphasizethesubject，objectandadverbial(includingadverbialoftimeandadverbialofplace)．3．Whenwewanttoemphasizethesubject，objectandadverbial，weonlyneedtoputthesepartsbetween“itis/was”and“that/who”，therestpartshouldn'tbechanged.4．Whentheemphasizedpartisapersonwecanuseboththestructure“Itis/was...that...”andthestructure“Itis/was...who...”．Whentheemphasizedpartisnotapersonwecanonlyusethestructure“Itis/was...that...”．5GrammarpracticeAskstudentstodothefollowingexercises：1．Changethefollowingsentencesintoemphasizedsentences.(Toemphasizetheunderlinedparts.)[来源:学科网](1)Peterlentusthemoney.(2)Theywantmoney.[来源:学科网][来源:学+科+网](3)Allthishappenedon_Monday.[来源:学.科.网](4)Ididn'thearfromheruntil_last_summer.(5)WhydoeseveryonethinkIamnarrow－minded?Suggestedanswers：(1)ItwasPeterwholentusthemoney.(2)Itismoneythattheywant.(3)ItwasonMondaythatallthishappened.(4)ItwasnotuntillastsummerthatIheardfromher.(5)WhyisitthateveryonethinksIamnarrow－minded?Thelasttwomaybealittledifficultforthestudents.Helpthemtogetthecorrectanswer.2．DoExercise2inDiscoveringusefulstructuresonPage29.3．DotheexercisesinUsingStructuresonPage64.Firstaskstudentstodotheexercisesindividually，andthenletthemdiscussandchecktheir3answerswiththeirpartners，andfinallygivethemcorrectanswersanddealwithanyproblemstheymightmeet.6GettingmoreaboutthegrammarShowthefollowingsentencestothestudentsandaskthemtofindwhatthesimilarityofthesesentencesis.1Itiswhatyoudoratherthanwhatyousaythatmatters.2Itwasafterhegotwhathehaddesiredthatherealizeditwasnotsoimportant.3ItwasnotuntilshegothomethatJenniferrealizedshehadlostherkeys.Suggestedanswers：Inthesethreesentences，theunderlinedpartsareallclauses—asubjectclauseandtwoadverbialclauses.Thatistosay，theemphasizedsentencecannotonlybeusedtoemphasizesubject，objectandadverbial，butalsobeusedtoemphasizesubjectclausesandadverbialclauses.Payspecialattentiontothethirdsentence，inwhich“not”and“until”mustbeputtogether.ThenshowthefollowingtwosentencestostudentsandaskthemtotranslatethemintoChinese.Payattentiontothesentencepattern.1Wasitin1969thattheAmericanastronautssucceededinlandingonthemoon？2Whowasitthatputsomanylargestonesontheroad？Suggestedanswers：(1)美国宇航员是于1969年成功登陆月球的吗？(2)究竟