Unit21HumanBiologyLesson1Warm-upTeachingaims1.newwordsandphrases2.warm-up3.studythetext:Tochewornottochew…4.grammar:conditionalsTeachingtimeTwoperiodsTeachingprocessStep1Revision:1.haveadictation(unit20newwords)2.checkhomeworkexercisesStep2newwordslearning1.asksomestudentstoreadthenewwordsfirstandcorrecttheirpronunciation2.playthetapeandhavethemreadafterthetape用心爱心专心3.givethemafewminutestoreadthenewwordsfreely,tellthemiftheycan’treadthenewwords,encouragethemtoasktheteacher.Step3Warm-up1.Readunitobjectives,andaskthestudentstotellusthemeanings.2.warm-up:Exercise1a)askstudentsreadthekeywordsfirst,thenguesstheirmeanings,havethemtranslatethekeywordsintoChinese.b)studentsworkindividually,matchingsixofthekeywordswiththenumbersinthepicture.Then,checktheiranswers.c)askthemreadthekeywords.3.Exercise2a)listentothetapetwice,havestudentsguesswhichpartofthebodyarebeingdescribed.b)playthecassette,pausingaftereachsectiontochecktheiranswers.C)answers:1.brain2.heart3.hungs4.eye5.liver4.Exercise3用心爱心专心a)makesuretheclassknowwhattodo.Thenplaythetapetwice,asksomestudentstosaytheiranswerstotheclass.5.Exercise4:workinpairsandtestyourbody“machine”a)readouttheinstructionstotheclassandcheckthatstudentsunderstandthem.b)havethestudentsworkinpairsanddiscussthequestions.6.exercise4:givestudentsafewminutestodothequestionnaireinpairs.Thenchecktheirscoresonpage103.step4Reading1.Beforeyoustarta)readtheexercise1andgivethemafewminutestodiscussthequestionsb)asksomestudentstosharetheirideaswiththeclass.2.Readtolearna)askthestudentslookatexercise2and3,andthenplaythecassettetwice.b)givethemtenminutestoreadthetextandcompletethetable.用心爱心专心c)checktheirsanswers3.exercise4a)givestudentssometimetodotheexercisesinpairsb)asksomestudentstoanswerthequestions4.Languagepointsa)Dietspecialistsregularlyinformusthatitisimportanttochewourfoodproperly.营养学家们经常告诫我们一定要正确咀嚼食物。句型:Itis+adj.+todosth.It是形式主语,动词不定式是真正的主语.b)itwillhelpourbodiesdigestitbetter.这样才能有助于身体更好地消化食物.helpsb.dosth.c)doeschewinggumhaveanyeffectonthisprocess?咀嚼口香糖对这一过程有什么影响呢?Haveanyeffecton…d)oneobviousbenefitofchewinggumisthatitfightsbadbreath.一个显而易见的好处是嚼口香糖能清除口腔异味.That引导的是表语从句.用心爱心专心Badbreath口腔异味e)ifithasgreenplantsmaterialsaddedtoit.havesth.done.Addtof)toothdecay蛀牙g)washaway清除h)loseweight减肥i)carryout进行,执行,开展j)upto一直到,等于k)bynow到如今l)today,therearegumproductsthathelpsmokersgiveuptheirbadhabit.That引导的定语从句修饰gumproducts,在从句中做主语.Giveup放弃m)thenegativesideofn)theproductionofstomachacidanddigestivejuices用心爱心专心o)ithasalsobeenproventhatchewinggumforlongperiodsoftimemeansthatthebodydoesnothavetimetorest.p)leadtoq)some…others….r)sendoutv.发送,派遣,放出s)insteadoft)brushone’steethu)thenumberof…的数目；数量v)onbalanceadv.总而言之step5grammar:conditionalsrevision1.exercise6-9readtheinstructionstotheclass.givethemsometimetodotheexercisesindividually.Thenasksomestudentscometotheblackboardtodothem.Step6Summaryandhomeworka)summaryb)homework:newwordsanddoexercisesonpage80-81用心爱心专心
