湖南省蓝山二中高一英语必修四《unit2Grammarandusage》教案牛津版Step1:GeneralintroductionForreference:1.Ifwetalkabouttheabilitysomeonehasnow,weusethemodalverbcan.2.Ifwetalkabouttheabilitysomeonehadinthepast,weusuallyusethemodalverbcould.3.Ifwewanttotalkabouttheabilitysomeonewillhaveinthefuture,wewillusetheformofthemodalverbwill/shallbeableto.4.Modalverbsshould/oughtto(sometimeshaveto)arealwaysusedtogiveadviceortellsomeonethatheorsheisunderobligationtodosomething.5.Ifwewanttoexpressthatitisnecessaryforustodosomething,modalverbmustisoftenused.6.Modelverbsmay/might,can/couldareoftenusedtoaskforpermission.Examples:1.Now,manyofuscanspeakEnglishquitewell,butafewyearsago,wecouldn’t.2.Shallwebeabletobeadmittedthefamousuniversityforfurtherstudyinayear?3.Youshould/oughttolearnenoughknowledgetoservethepeople.4.Everyonepresentatthemeetingmustlookintothemattercarefulandgiveasmuchadviceaspossibleonhowtosolvetheproblem.5.Asastudent,youhavetoobeytherulesoftheschool.6.I’msorryIamlateforclass.May/CanIcomein?Step2:Practice1.Nowlookattheblackboard,I’dlikeyoutoexplainthemeaningsofthedifferentmodalverbsusedinthissentence:Imight/may/could/should/oughtto/will/mustwatchtheTVprogrammetonight.Whenmightisused,itshowsthatthespeakerisuncertainwhetherheorshewilldosomething.Whenmayisused,itshowsthatthespeakerissbitmorecertainthanwhenmightisused.Couldismorecertainthanmay,butlesscertainthanshouldandoughtto.Shouldandoughttoaremorecertain.Whenweusewill,wemeanwearequitecertainthatwewilldosomething.Ifweusemust,wearealmostcertaintodosomething.2.Ifyouwanttohavealookatyourfriend’sbook,whatdoyousay?(CanIhavealookatyourbook?)Whatdoesyourfriendsaytoyou?(‘Ofcourse,youcan.’Or‘sorry/No,youcan’t)Socanisalsousedtoaskforpermission,especiallyininformalorspokenEnglish.3.NowreadPart1onpage28tofindouthowmodalverbsareusedtotalkaboutability,obligation,certaintyandpermission.Payattentiontothethreearrowsthatillustratethedegreesofobligation,certaintyandpermissionwhenmodalverbsareused.4.Readpart2andusemodalverbstomakerequests,suggestionsoroffers,andgiveadvice.e.g.:Will/Canyoureadthesentenceoncemore?(Tomakearequest.)Shallwewatchafilmtonight?(Tomakeasuggestion)Iwillhelpyouifyouhaveanyproblems(Tomakeanoffer)Themanagerisnotinnow.Youshouldcomebackatthreeo’clock(Togiveadvice)5.Nowpleasereadtheinstructionsfortheexerciseonpage29.ThencompletethearticleindividuallyandIwillchecktheanswerslater.Answers:(1)must(2)hasto(3)must(4)must(5)should(6)oughtto(7)could(8)may(9)could6.ReadPart4onpage28andtryyourbesttounderstandwhythecontinuousformortheperfectformisusedwithamodalverbintheexamplesentences.FirstI’llgiveyousomeexamples:Johnisn’theretoattendtheparty.Hemustbereviewinghisnotesforthebigexamtomorrow.(ThespeakerthinksthatJohnisreviewinghisnotesnow.)Tomknowsnothingaboutthesubject.Hecan’thavebeenatthelectureyesterday.(ThespeakerissurethatTomdidnotgotothelectureyesterday.)Themoneyisgone.Whocouldhavetakenit?(Thespeakerdoesnotknowwhohastakenthemoney.)Step3:Comparisonofsomepairsofmodelverbscomparisoncan,beabletoshall,willneed,daremustn’t,needn’t1.ReadPart1onpage30andfindthedifferencesbetweencanandbeableto.·Beabletoismoreformalandlesscommonthancanwhenreferringtoability.·Beabletocanbeusedindifferenttensesorafterothermodalverbs,forexample,will/shallbeableto,would/shouldbeableto,have/has/hadbeenableto,must/may/mightbeableto.·Beabletocanbeus...
