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1、●GrammarandusageStep1:GeneralintroductionForreference:1.Ifwetalkabouttheabilitysomeonehasnow,weusethemodalverbcan.2.Ifwetalkabouttheabilitysomeonehadinthepast,weusuallyusethemodalverbcould.3.Ifwewanttotalkabouttheabilitysomeonewillhaveinthefuture,wewillusetheformofthemodalverbwill/
2、shallbeableto.4.Modalverbsshould/oughtto(sometimeshaveto)arealwaysusedtogiveadviceortellsomeonethatheorsheisunderobligationtodosomething.5.Ifwewanttoexpressthatitisnecessaryforustodosomething,modalverbmustisoftenused.6.Modelverbsmay/might,can/couldareoftenusedtoaskforpermission.Exa
3、mples:1.Now,manyofuscanspeakEnglishquitewell,butafewyearsago,wecouldn’t.2.Shallwebeabletobeadmittedthefamousuniversityforfurtherstudyinayear?3.Youshould/oughttolearnenoughknowledgetoservethepeople.4.Everyonepresentatthemeetingmustlookintothemattercarefulandgiveasmuchadviceaspossibl
4、eonhowtosolvetheproblem.5.Asastudent,youhavetoobeytherulesoftheschool.6.I’msorryIamlateforclass.May/CanIcomein?Step2:Practice1.Nowlookattheblackboard,I’dlikeyoutoexplainthemeaningsofthedifferentmodalverbsusedinthissentence:Imight/may/could/should/oughtto/will/mustwatchtheTVprogramm
5、etonight.Whenmightisused,itshowsthatthespeakerisuncertainwhetherheorshewilldosomething.Whenmayisused,itshowsthatthespeakerissbitmorecertainthanwhenmightisused.Couldismorecertainthanmay,butlesscertainthanshouldandoughtto.Shouldandoughttoaremorecertain.Whenweusewill,wemeanwearequitec
6、ertainthatwewilldosomething.Ifweusemust,wearealmostcertaintodosomething.2.Ifyouwanttohavealookatyourfriend’sbook,whatdoyousay?(CanIhavealookatyourbook?)Whatdoesyourfriendsaytoyou?(‘Ofcourse,youcan.’Or‘sorry/No,youcan’t)Socanisalsousedtoaskforpermission,especiallyininformalorspokenE
7、nglish.3.NowreadPart1onpage28tofindouthowmodalverbsareusedtotalkaboutability,obligation,certaintyandpermission.Payattentiontothethreearrowsthatillustratethedegreesofobligation,certaintyandpermissionwhenmodalverbsareused.4.Readpart2andusemodalverbstomakerequests,suggestionsoroffers,
8、andgiveadvice.e.g.:Will/Ca
