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Unit13LanguageStudyWordstudy&ModalVerbsYanDangMountainWatercanAbilityWhatPropertiesdoeswaterhave?turnsolidwhenfrozendissolvegasesandsolidsgiveoffgaswhenheatedWhatdoeshe/shehopehe/shecando?AbilityShecanperformballet(芭蕾).Hehopedhecouldflyaplane.OnOct.15,2003,hewasableto(×could)completeChina’sfirstspaceflight.Whatabilitywouldyouliketodevelop?IhopeIcan…IhopeIamableto…IwishIcould…AbilityNecessityWhatdoyouneedtodoinordertoreachyourability?Imust/should…Ihave(got)to…Ineedto…AbilityNecessityImust/should…Ihave(got)to…Ineedto…IhopeIcan…IhopeIamableto…IwishIcould…RequestPermissionTheroadsignsindicatePeoplemay/can…PermissionWhenadriverseestheroadsigns,hemustn’t/can’t…Whenadriverseestheroadsign,hemust/have(got)to/should…NecessityAsmanyas3000millionpeoplethroughouttheworldcouldfaceawatershortageby2025ifthepresentsituationcontinues.Bythen,theglobalpopulationisexpectedtoreachabout7.5billion.Manybigcities,includingBeijing,ShanghaiandTianjin,willsufferseverewatershortages,…Ifitistrue,whatmayorwillhappeninthefuture?Whatshouldpeopledotosolvetheproblem?GuessingAwatershortagecan/could…Lackofwatermay/might…PossibilityCertaintyIflackofwatercontinues,peoplewill/must/should…Ifitistrue,whatmayorwillhappeninthefuture?Suggestion•Whatshouldpeopledotosolvetheproblem?People(We,Scientists,etc.)should/oughtto/hadbetter…OrWecan/could/may…Possibility:Ability:Requests:Necessity:Certainty:Permission:Suggestions:Advice:can/could,may/mightcan/could,beabletocan/could,will/would,wouldlikemust,haveto,havegotto,needmust,will,shouldcan/could,may/mightcould,may/might,shallshould,oughtto,hadbetterSummaryModalVerbsModelVerbsExamplesAbilityNecessityPermissionGuessing(possibility/certainty)Suggestion/AdviceRequestcan/couldbeabletoHecan/couldflyaplane.must/haveto/havegotto/needHehadtogetspecialtraining.can/couldmay/might/mustn’tWemustprotectwater.might/may/could/should/must/will/canLackofwaterinthefuturemayresultinseveralproblems.could/may/mightshall/should/oughttohadbetterCouldyouhelpme?/Wouldyouliketohelpme?Wehadbetterusewaterformorethanonepurpose.can/could/will/would/wouldlikePeoplecanwalkthisway.Adrivermustn’tdrivebeyondthespeedlimit.1.Oneofyourbestclassmatesisabsentfromclass,andyoucaremuchabouthisorherabsence.(guessing,ability,necessity,suggestion,etc.)2.Yourschoolcarryoutabanoncarryingacellphoneintheschoolcampus.Youandyourclassmatesargueoverthisschoolrule.(permission,necessity,request,suggestion,etc.)3.Inyourfamily,yourparentshavefoundthecharges(费用)forwaterandelectricityarerisingthesedays.Youarehavingafamilymeeting.(guessing,request,necessity,suggestion,etc.)Finishgrammarexercisesonpage21andpage98.HomeworkThankyouforyourattention!