高二英语《unit 21 human biology the second period grammar（ⅰ）》教案

《高二英语《unit 21 human biology the second period grammar（ⅰ）》教案》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、安徽省滁州二中高二英语《Unit21HumanBiologyTheSecondPeriodGrammar（Ⅰ）》教案StepⅠRevisionandlead-inT:Attheendoflastperiod,Iaskedyoutofindoutallthesentencesinitalicsinthearticle—SuperAthletes.Haveyoufinishedcollectingthesesentencesinitalics?Howmanysentencesinitalicsarethereinthisarticle?Ss:T

2、herearesevensentencesinitalicsinthisarticle.T:Right.Thenwhowouldliketopresentthesesentences?S:Iwouldliketodoit.ManycontemporaryamateurathleteswouldhavebrokenworldrecordsiftheyhadtakenpartinthefirstOlympicGames.Ifrecordsfall,itisusuallyduetobetterequipment,traininganddiet.B

3、enJohnsonwouldstillbethe100metresworldholderifhehadnotbeencaughttakingdrugsinthe1988Olympics.IfcurrentOlympicchampion,MarionJones,tooksuchdrugs,shewouldprobablyhavebrokenthatworldrecordmorethanonce.Unlesswearecareful,“gene-therapy”willbethenextbigthreat.Ifgene-therapywereu

4、sednow,itwouldbealmostimpossibletofindout.Ifagenerationofsportsstarswithenhancedgeneswerecreated,itwouldcontradictthewholespiritofsport.T:Great.Youhavedoneagoodjob.Inthisperiod,studentsareexpectedtoreviewsomeconditionalsentencestheyhavelearnedbefore,andthentheywilllearndif

5、ferentusageoftherealandunrealconditionals.Ifstudentswanttoknowmoreabouttheusage,theycanreadthedetailedexplanationthatareincludedintheappendix(附件).Teachersmaydistributethemtostudentsforreference.StepⅡTheconditionalsentencesShowthestudentsthesentencestheypresentaboveonthescr

6、eenandhavethemfindoutthedifferencesamongthem.Itaimstohelpthemtotellthedifferencesamongthem.T:Lookatthesefoursentences,whattimedoeseachcondition(underlined)inthesentencereferto:past,presentorfuture?Whattenseisused?Let’scompletethetablebelow.ConditionTimereferenceVerbform1th

7、epresentpastsimple2thepresentpastsimple3thepasthad+pastparticiple4thepasthad+pastparticipleT:Whattimedoestheresultinthesentencesreferto:pastorpresent?Whatverbformisused?ResultTimereferenceVerbform1thepastwould+perfectinfinitive2thepastwould+perfectinfinitive3thepresentwoul

8、d+verb4thepresentwould+verbTask3ExplanationT:Thisisastructureusedtotalkaboutunreal,imagin