必修二（unit3 computers--period2 learning about language） (2)

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1、Period2LearningaboutLanguageTheGeneralIdeaofThisPeriod：Thisperiodincludesrevisionofthetext、learningaboutlanguage.Fromthisperiodthestudentswilllearnhowtousesomeofthekeywordsandexpressionsinthetextanddosomeexercisesforconsolidation，andlearnhowtousethePresentPerfectPassiveVoice.Teach

2、ingAims：1.Helpthestudentstolearntousesomeusefulwordsandexpressions.2.Enablethestudentstolearnhowtousethepresentperfectpassivevoice.TeachingImportantPoint：Theuseofthepresentperfectpassivevoice.TeachingDifficultPoints：HowtomastertheusagesofsomeimportantwordsandphrasesandthePresentPe

3、rfectPassiveVoice.TeachingMethods：1.Task-basedlearning.2.Cooperativelearning.3.Explanationandpractice.TeachingAids：1.Ataperecorder.2.Amultimedia.TeachingProcedures：Step1RevisionT：Boysandgirls，inlastperiodwelearnedsomethingaboutthehistoryanddevelopmentofcomputers.Nowwhowouldliketor

4、etellthetextwiththehelpofthesefigures?S1：Letmetry.In1642，acalculatingmachinewasusedinFrance.Thenin1922，theAnalyticalMachinewasmadebyCharlesBabbage.Itcouldfollowinstructionsfromcardswithholes.In1936，AlanTuring，therealfatherofcomputers，wroteabooktodescribehowcomputerscouldbemadetowo

5、rkandbuilta“universalmachine”tosolveanymathematicalproblem.Later，peoplediscoveredthecomputerhad“artificialintelligence”.Inthe1960s，thecomputergothisnewtransistors.Itssizewastotallychangesatthattime.Andintheearly1960s，thefirstfamilyofcomputerswereconnectedtoeachother.In1970s，comput

6、ershavebroughtintopeople’shomes.NowcomputershavebeenusedbybillionsofpeopletodealwithinformationandcommunicatewitheachotheraroundtheworldbytheInternet.T：Congratulations!You’vedoneverywell.Nowtrytodothesametoyourpartners，OK!Step2WordsandExpressionsTask1T：PleaseturntoPage19andfinishD

7、iscoveringUsefulWordsandExpressions.Atfirst，lookatEx.1.Fromthereadingpassage，findthewordsandexpressionswiththefollowingmeanings.Now，tenstudentswillbeaskedtogivethewords.Whocan?Volunteers!Checktheanswerstogether.Task2.T：Welldone.NowpleaselookatEx2.andcompletethepassagewithsomeofthe

8、wordsabove.Payattentiontotheusean