saving the earth（the fifth period）

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1、Savingtheearth（TheFifthPeriod）　　TheFifthPeriod　　Inversion　　TeachingAim:　　Learnandmastertheuseofinversion.　　TeachingImportantPoint:　　Helptilestudentstomakeasummaryofallkindsofinversion.　　TeachingDifficultPoint:　　Helpthestudentsknowinwhichcasesfullinversionisusedandinwhichcasespartialinversionisused.

2、　　TeachingMethods:　　Revision;summary;explanationandinductivemethods.　　TeachingAids:　　aprojectorandtheblackboard　　TeachingProcedures:　　StepGreetings　　Greetthewholeclassasusual.　　StepIIRevisionandLead-in　　T:InUnit9,we’velearntsomesentencesininvertedword-order.Now,I’llshow　　yousomesentencesonthescreen

3、.Pleasetellwhichareinnaturalornormalword-orderandwhichareininvertedword-order.Lookatthescreenandcomparethemcarefully.　　(Showthefollowingonthescreen.)　　Outrushedtheboy.　　Theboyrushedout.　　Onlyinthiswaycanweloseweight.　　Wecanloseweightonlyinthisway.　　T:Whocantelluswhichareinnormalword-order?　　S:Iknow

4、.Thesecondsentenceineachpairisinnormalword-order.　　T:Howdoyouknow?　　S:Ifthepredicatecomesafterthesubject,itisinnormalword-order.　　T:Verygood.Sothefirstsentenceineachpairisininvertedword-order.Inthefirstpair,thewholepredicateofthefirstsentencecomesbeforethe　　subject,inthesecondpair,partofthepredicat

5、eofthefirstsentencecomes　　beforethesubject.Now,pleaselookatthescreen.　　(Showthefollowingonthescreenandmakebriefexplanationifnecessary.)　　Word-order　　naturalword-order:S+V　　invertedword-orderV+S　　Auxiliary/Modal+S+V　　StepHISummaryandExplanation　　T:Ifthepredicateverbisplacedbeforethesubject,thesenten

6、ceissaidtobe　　ininvertedword-order.Suchaword-orderiscalledinversion.Weuseinversionfortworeasons.Onefortheneedofthegrammaticalstructureofagiventypeofsentence,theotherforemphasisofacertainpartofasentence.Inversionhappensinquestions,andinanumberofothercases.Therearetwomainkindsofinversion.Insomecasest

7、hewholeverbcomesbeforethesubject.Thiskindofinversioniscalledfullinversion.Andinmostcases,anauxiliaryverboramodalverbcomesbeforethesubjectandtherestofthepredicateverbcomesafter.Ifthere’snoauxiliaryormodalver