七年级英语下册Unit 4 SectionA (Grammar Focus 3c)课件

Don'teatinclass.

Unit4第二课时：SectionA(GrammarFocus-3c)Don'teatinclass.Unit4第二课时Ourschoolisverybigandbeautiful，andtherearealotofruleshelpingustostudybetter.Canyoutellmetherulesintheschool?Lookatthepicturetotalkaboutwhatyouhaveto/must/can’tdo.OurschoolisverybigGrammarFocusDon'truninthehallways.Don'tfight.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan't,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan't.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn't.Whatdoyouhavetodo?Wehavetobequietinthelibrary.GrammarFocusDon'truninthe语法讲解祈使句用于表达命令、请求、劝告、警告、禁止等的句子叫做祈使句。祈使句最常用于表达命令。祈使句因对象(即主语)是第二人称，所以通常都省略主语。祈使句的开头动词都为原形，句末则使用句号或叹号。语法讲解祈使句用于表达命令、请求、劝告、警告、禁止等eg:Goandwashyourhands.去洗你的手。(命令)Bequiet,please.请安静。(请求)Bekindtoyoursisters.对妹妹要和善。(劝告)Lookout!Danger!小心！危险！(警告)Keepoffthegrass.勿践踏草坪。(禁止)eg:Goandwashyourhands.去洗你Do型动词原形(＋宾语)＋其他成分Pleasehaveaseathere.请这边坐。Be型Be＋表语(名词或形容词)＋其他成分Beagoodboy!要做一个好孩子！Let型Let＋宾语＋动词原形＋其他成分Letmehelpyou.让我来帮你。考点祈使句的形式考向一肯定祈使句的形式：Do型动词原形(＋宾语)＋其他成分Pleasehavea—________dressednow!Wehavetogointenminutes.—OK,Mom.(济南)A.Getting

B.Get

C.Toget

D.Gets典例B—________dressednow!Wehave考向二否定祈使句的表现形式：Do型在句首加Don'tDon'tforgetme!不要忘记我！Be型Don'tbelate!不要迟到！Let型Don't＋let＋宾语＋动词原形＋其他成分Don'tlethimgo.=Lethimnotgo.别让他走。Let＋宾语＋not＋动词原形＋其他成分No型No+动词的-ing形式！Nofishing!禁止垂钓！考向二否定祈使句的表现形式：Do型在句首加Don'tDon'典例1Daniel,________playwiththemobilephonewhileyou'rewalkinginthestreet.(盐城)A.don'tB.doesn'tC.won'tD.can'tA典例2Whichsignofthefollowingmeans“Nosmoking”?(宿迁)√典例1Daniel,________playwith魔法记忆祈使句用法歌诀祈使句，祈使句，请求、命令或建议。主语是you常省去，动词原形开头记。否定形式要注意，句首要把Don’t立。要讲客气用please，句首、句末没关系。Nodoing!需提起，表示“禁止”不小觑。魔法记忆祈使句用法歌诀考点1haveto的用法考向一haveto后跟动词原形，意为“必须做……；不得不做……”。情态动词haveto和musthaveto表示客观需要做的事情，意思是“必须；不得不”。eg:It’sraining,andyouhavetobringanumbrella.下雨了，你必须带把伞。考点1haveto的用法考向一haveto后跟动词原考向二haveto有人称和数的变化，其第三人称单数形式为hasto。eg:Shehastolookafterheryoungerbrother.她不得不照看她的弟弟。考向二含有have/hasto的句子要借助于助动词do/does以及don’t/doesn’t构成一般疑问句或否定句。考向二haveto有人称和数的变化，其第三人称单数形式为eg:Dotheyhavetodothework?他们必须做这项工作吗？Hedoesn’thavetogohomenow.他不必现在就回家。典例You_______takemetothestation.Mybrother’stakingme.(江西)A.can’tB.mustn’tC.shouldn’tD.don’thavetoDeg:Dotheyhavetodothewor考点2must的用法考向一must为情态动词，意为“必须，一定”。情态动词不能单独作谓语动词，必须和动词原形一起构成谓语部分。eg:YoumustreadabookbeforeyouwatchTV.在看电视前你必须读书。典例I_______gonow,orI’llmissmytrain.(北京)A.canB.mightC.mustD.couldC考点2must的用法考向一must为情态动词，意为“必须考向二must用于否定句时，mustn’t意为“不允许，禁止”，而不表示“不必”。eg:Youmustn’tbelateforschool.你千万不要上学迟到。典例—Hurryup,Mom!Thebusiscoming.—Waitaminute,dear.You_________crosstheroaduntilthetrafficlightsturngreen.(丹东)A.mustB.needC.mustn’tD.needn’tC考向二must用于否定句时，mustn’t意为“不允许，考向三以must开头的一般疑问句，若作否定回答，可以用needn’t或don’thaveto，不用mustn’t。eg:—MustIcleanalltherooms?我必须打扫所有的房间吗？—No,youneedn’t/don’thaveto.不，你不必。典例—MustIhandin(上交)myhomeworknow,Mr.Smith?—No,you_______.(北京)A.can’tB.shouldn’tC.wouldn’tD.needn’tD考向三以must开头的一般疑问句，若作否定回答，可以用ne考向四辨析：haveto与musthaveto强调客观存在的必要性，含有不情愿的色彩，不能用来表示推测。must表示说话人的主观意志和看法，含有自觉、自愿的色彩。Ihavetostudyhard我不得不努力学习Imuststudyhard我必须努力学习考向四辨析：haveto与musthaveto强调客3aLibraryRules1.Don'ttalk.2.____________________3.____________________4.____________________Writetherulesfortheschoollibrary.Don'teatinthelibrary.Don'tlistentomusic.Don'ttakephotos.__________________________3aLibraryRulesWritetherules3bUsethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.Bequiet?Q:Doesshehavetobequietinthelibrary?(she/haveto/inthelibrary)?A:Yes,shedoes.3bUsethewordstomakequestiEat?Q:___________________________________(he/haveto/inthedininghall)?A:_____________________Listentomusic?Q:____________________________________(we/can/inthehallways)?A:_____________________Doeshehavetoeatinthedininghall?Yes,hedoes.Canwelistentomusicinthehallways?No,wecan't.Eat?DoeshehavetoeatintheWearahat?Q:__________________________________(we/can/intheclassroom)?A:__________________Canwewearahatintheclassroom?Yes,wecan.Wearahat?Canwewearahati3c1.Wecaneatinclass.2.Wedon'thavetocometoschooleveryday.3....Atmydreamschool,wedon'thavetocometoschooleveryday.We...Makeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!3c1.Wecaneatinclass.Atm单项选择1.—_______ontheTV,Jim.I’dliketowatchtheeveningnews.—OK,Dad.(济南)A.TurnB.TurnsC.TurningD.ToturnA单项选择1.—_______ontheTV,Jim2.Please_______yourexampapersonceagainbeforehandingthemin.(上海)A.goingoverB.wentoverC.gooverD.togoover3.—Let’s_______chess.—Goodidea!A.playB.toplayC.playingD.playedCA2.Please_______yourexampa4.Let’s______anoise.Someoneissleeping.(齐齐哈尔)A.notmakeB.nomakingC.nottomake

AD【点拨】用语境判定法解题。由后一句“有人在睡觉。”可知要求对方“不要制造”噪音；letsb.notdosth.是固定结构，故选A。5.________onthegrass,oritwill“cry”.

(陕西)A.TowalkB.NottowalkC.WalkD.Don’twalk4.Let’s______anoise.Someon6.Allthestudents_______knowcheatingintheexamisnotallowed.(十堰)A.needB.mayC.mustD.can7.—Excuseme,sir.Visitinghoursareover.You______leave.—Pardonme,nurse.Ididn’thearthebell.(东营)A.mayB.canC.mustD.needCC6.Allthestudents_______kno8.—MustIdothedishesnow?—No,you________.(新疆)A.mustn’tB.needn’tC.maynotD.can’tBD【点拨】mustn’t禁止；needn’t没必要；maynot不可以；can’t不可能。以must引导的疑问句否定回答用needn’t，意为“没必要”。故选B。9.Shedoesn’thaveto_______thedishes.A.washingB.washesC.towashD.wash8.—MustIdothedishesnow?BD10.Bobcan’tgohikingwithusbecausehe________helpwiththehouseworkathome.A.havetoB.hastoC.mustnotD.shouldn’tB【点拨】鲍勃不能去远足是因为“不得不”在家帮忙做家务，此处指客观上的需要，且主语是第三人称单数，故选B。10.Bobcan’tgohikingwithus本节课主要听写了单词，学习了语法：①祈使句②情态动词haveto和must的用法，并做了相应的练习加以巩固。本节课主要听写了单词，学习了语法：Don'teatinclass.

Unit4第二课时：SectionA(GrammarFocus-3c)Don'teatinclass.Unit4第二课时Ourschoolisverybigandbeautiful，andtherearealotofruleshelpingustostudybetter.Canyoutellmetherulesintheschool?Lookatthepicturetotalkaboutwhatyouhaveto/must/can’tdo.OurschoolisverybigGrammarFocusDon'truninthehallways.Don'tfight.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan't,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan't.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn't.Whatdoyouhavetodo?Wehavetobequietinthelibrary.GrammarFocusDon'truninthe语法讲解祈使句用于表达命令、请求、劝告、警告、禁止等的句子叫做祈使句。祈使句最常用于表达命令。祈使句因对象(即主语)是第二人称，所以通常都省略主语。祈使句的开头动词都为原形，句末则使用句号或叹号。语法讲解祈使句用于表达命令、请求、劝告、警告、禁止等eg:Goandwashyourhands.去洗你的手。(命令)Bequiet,please.请安静。(请求)Bekindtoyoursisters.对妹妹要和善。(劝告)Lookout!Danger!小心！危险！(警告)Keepoffthegrass.勿践踏草坪。(禁止)eg:Goandwashyourhands.去洗你Do型动词原形(＋宾语)＋其他成分Pleasehaveaseathere.请这边坐。Be型Be＋表语(名词或形容词)＋其他成分Beagoodboy!要做一个好孩子！Let型Let＋宾语＋动词原形＋其他成分Letmehelpyou.让我来帮你。考点祈使句的形式考向一肯定祈使句的形式：Do型动词原形(＋宾语)＋其他成分Pleasehavea—________dressednow!Wehavetogointenminutes.—OK,Mom.(济南)A.Getting

B.Get

C.Toget

D.Gets典例B—________dressednow!Wehave考向二否定祈使句的表现形式：Do型在句首加Don'tDon'tforgetme!不要忘记我！Be型Don'tbelate!不要迟到！Let型Don't＋let＋宾语＋动词原形＋其他成分Don'tlethimgo.=Lethimnotgo.别让他走。Let＋宾语＋not＋动词原形＋其他成分No型No+动词的-ing形式！Nofishing!禁止垂钓！考向二否定祈使句的表现形式：Do型在句首加Don'tDon'典例1Daniel,________playwiththemobilephonewhileyou'rewalkinginthestreet.(盐城)A.don'tB.doesn'tC.won'tD.can'tA典例2Whichsignofthefollowingmeans“Nosmoking”?(宿迁)√典例1Daniel,________playwith魔法记忆祈使句用法歌诀祈使句，祈使句，请求、命令或建议。主语是you常省去，动词原形开头记。否定形式要注意，句首要把Don’t立。要讲客气用please，句首、句末没关系。Nodoing!需提起，表示“禁止”不小觑。魔法记忆祈使句用法歌诀考点1haveto的用法考向一haveto后跟动词原形，意为“必须做……；不得不做……”。情态动词haveto和musthaveto表示客观需要做的事情，意思是“必须；不得不”。eg:It’sraining,andyouhavetobringanumbrella.下雨了，你必须带把伞。考点1haveto的用法考向一haveto后跟动词原考向二haveto有人称和数的变化，其第三人称单数形式为hasto。eg:Shehastolookafterheryoungerbrother.她不得不照看她的弟弟。考向二含有have/hasto的句子要借助于助动词do/does以及don’t/doesn’t构成一般疑问句或否定句。考向二haveto有人称和数的变化，其第三人称单数形式为eg:Dotheyhavetodothework?他们必须做这项工作吗？Hedoesn’thavetogohomenow.他不必现在就回家。典例You_______takemetothestation.Mybrother’stakingme.(江西)A.can’tB.mustn’tC.shouldn’tD.don’thavetoDeg:Dotheyhavetodothewor考点2must的用法考向一must为情态动词，意为“必须，一定”。情态动词不能单独作谓语动词，必须和动词原形一起构成谓语部分。eg:YoumustreadabookbeforeyouwatchTV.在看电视前你必须读书。典例I_______gonow,orI’llmissmytrain.(北京)A.canB.mightC.mustD.couldC考点2must的用法考向一must为情态动词，意为“必须考向二must用于否定句时，mustn’t意为“不允许，禁止”，而不表示“不必”。eg:Youmustn’tbelateforschool.你千万不要上学迟到。典例—Hurryup,Mom!Thebusiscoming.—Waitaminute,dear.You_________crosstheroaduntilthetrafficlightsturngreen.(丹东)A.mustB.needC.mustn’tD.needn’tC考向二must用于否定句时，mustn’t意为“不允许，考向三以must开头的一般疑问句，若作否定回答，可以用needn’t或don’thaveto，不用mustn’t。eg:—MustIcleanalltherooms?我必须打扫所有的房间吗？—No,youneedn’t/don’thaveto.不，你不必。典例—MustIhandin(上交)myhomeworknow,Mr.Smith?—No,you_______.(北京)A.can’tB.shouldn’tC.wouldn’tD.needn’tD考向三以must开头的一般疑问句，若作否定回答，可以用ne考向四辨析：haveto与musthaveto强调客观存在的必要性，含有不情愿的色彩，不能用来表示推测。must表示说话人的主观意志和看法，含有自觉、自愿的色彩。Ihavetostudyhard我不得不努力学习Imuststudyhard我必须努力学习考向四辨析：haveto与musthaveto强调客3aLibraryRules1.Don'ttalk.2.____________________3.____________________4.____________________Writetherulesfortheschoollibrary.Don'teatinthelibrary.Don'tlistentomusic.Don'ttakephotos.__________________________3aLibraryRulesWritetherules3bUsethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.Bequiet?Q:Doesshehavetobequietinthelibrary?(she/haveto/inthelibrary)?A:Yes,shedoes.3bUsethewordstomakequestiEat?Q:___________________________________(he/haveto/inthedininghall)?A:_____________________Listentomusic?Q:____________________________________(we/can/inthehallways)?A:_____________________Doeshehavetoeatinthedininghall?Yes,hedoes.Canwelistentomusicinthehallways?No,wecan't.Eat?DoeshehavetoeatintheWearahat?Q:__________________________________(we/can/intheclassroom)?A:__________________Canwewearahatintheclassroom?Yes,wecan.Wearahat?Canwewearahati3c1.Wecaneatinclass.2.Wedon'thavetocometoschooleveryday.3....Atmydreamschool,wedon'thavetocometoschooleveryday.We...Makeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!3c1.Wecaneatinclass.Atm单项选择1.—_______ontheTV,Jim.I’dliketowatchtheeveningnews.—OK,Dad.(济南)A.TurnB.TurnsC.TurningD.ToturnA单项选择1.—_______ontheTV,Jim2.Please_______yourexampapersonceagainbeforehandingthemin.(上海)A.goingoverB.wentoverC.gooverD.togoover3.—Let’s_______chess.—Goodidea!A.playB.toplayC.playingD.playedCA2.Please_______youre