Unit3ProtectingourselvesTask1TeachingAims:1.Teachstudentshowtoidentifydegreesofobligation.2.Improvethestudents’abilityoflistening.Teachingprocedures:Step1:Lead-inWhenwewanttogiveadvice,whatsentencepatternscanweuse?•Youhadbetter…•Youdon’thaveto•Youshould/oughtto…•Youhadbetternot…•Youhaveto…•Youmust/mustnot…Readthefollowingsentencesandtellthemeaningofeachsentence.•Youdonothavetogotoschooltomorrowifyouarefeelingill.•Mysuggestionisthatyoushouldstayathomeifyouwerefeelingill.•Youshouldsendheranote.•Itisyourdutytosendheranote.•Citizensmustregisterinordertovote.•Itisrequiredbylawthatcitizenmustregisterinordertovote.【设计说明】此导入是一个“热身运动”，因此让学生从相对熟悉的“提建议”入手讨论然后教师再通过一些例子让学生初步感受，引发他们的学习兴趣，为下一步的深入做好必要的铺垫。Step2Skillsbuilding1:identifyingdegreesofobligationReadthefollowingandtellwhichexpressesthestrongestobligation,whichexpresseslessstrongobligation,whichexpressestheleaststrongobligation,andgiveyoureasons.•Youdon’thavetogotoschooltomorrowifyouarefeelingill.•Yououghttoeatsomefruiteveryday.•Yououghtnottoeatsomuchicecream.•Youshouldgetenoughresteverynight.•Youshouldnotplaycomputergamesallevening.•Youhadbetterwakeupearliertomorrow.•Youhadbetternotwalkhomeintherain.•Youhavetotakemedicineifyouwanttogetbetter.•Wemustfinishourprojecttodaybecauseitisduetomorrow.•Youmustnotforgettodoyourhomework.ReadtheguidelinesandthesentencesinpartA.Ifyoumeetanynewwordsinthesesentences,guessthemeaningsofthesewords.•Whatdoestheword“chemist’s”meanfromthecontextofthewholesentence?•From‘…medicinessoldatthechemist’s…,’wecanknow‘thechemist’sisaplacewheremedicineissold.•Whatdoestheword‘painkiller’mean?•Wecanseethewordisacompoundone.Thefirstpartofthewordis‘pain’.Andthesecondpartis‘killer’,sowecanknowthat‘painkiller’referstoakindofmedicinethatcanbeusedtostoponefeelingpain.•Canyouguessthemeaningoftheword‘prescription’?•From‘…talktoyourdoctor…’wecanlearnthat‘prescriptiondrugs’areonesthatweshouldbecarefultakingbecausetheycouldbedangerousifusedincorrectly.Step3Listening(1A)ListentoalecturebyDrGrayandwritethemodalformsthedoctoruses.•1.Realizeourbodiesarenotmachinesthatcanbefixedquicklywhentheyarebroken.•2.Donottakeanymedicineforacommoncold.•3.Usedrugsfromthechemist’scarefully.•4.Donottaketoomanypainkillersastheycandamagethestomachandtheliver.•5.Talktoyourdoctorbeforeyoutakeacombinationofprescriptiondrugs.•6.Makesureyouknowifyoumightreactbadlytocertainmedicines.•7.Donotleaveanymedicinelyingaroundinthehouseincasechildrengetthem.【设计说明】通过听一段文章，让学生进一步感知情态动词的具体用法。Step4Listening(1B)ReadtheguidelinesofpartBandanswerthequestion•Whatareantibiotics?•Whataretheyusedfor?•Antibioticsaremedicinesthatcanbeusedtodamageorstopbacteriathatcancauseinfections.Categorizeallthesentencesaccordingtothetablebelow.Obligationlevel:*2Obligationlevel:**1,5Obligationlevel:***3,4,6,7【设计说明】通过听第二段文章，让学生区别一些情态动词的语气强烈程度。Step5Casestudy(1C)ReadpartC,andtakenotesonthethingsthatMr.andMrs.Tangdidwrong.•thingsMr.andMrs.Tangdidwrong.•Mrs.Tangtookalotofpainkillers.•Mr.TanggaveMrs.Tangsomeunknownmedicine.•Mr.TanggaveMrs.Tangsomeantibioticshehadleftfromapreviousillness.•Mrs.Tangtooksomeantibioticswithoutknowingwhattheywere.【设计说明】通过朗读一篇短文，让学生学会如何记笔记的好习惯。Step6Homework:Workbook:P.114C1,C2
