Unit4Don27teatinclassSectionAGrammarFocus-3c市公开课一等

Unit41/35Unit4Don'teatinclass.2/35

SectionAGrammarFocus-3c3/35Objectives1.TolearnImperativesDon’t…:Don’truninthehallways.2.Tolearntousecanforpermission:Canweeatintheclassroom?3.Tolearntousemodalverbshaveto&must:Wehavetobequietinthelibrary.Wemustbeontimeforclass.4/351.不要在楼道里跑。_______________________2.不要打架。_______________3.有什么规矩？__________________________4.我们必须按时上课。__________________________Don’tfight.Don’truninthehallways.Whataretherules?Wemustbeontimeforclass.GrammarFocus5/355.我们能够在教室里吃东西吗？

_____________________________6.不能。但我们能够在餐厅里吃东西。____________________________________________________________7.我们能够在上课时候带帽子吗？___________________________Canwewearahatinclass?No,wecan’t,butwecaneatinthedininghall.Canweeatintheclassroom?6/358.他在学校里必须穿校服吗？_________________________________9.是，必须。/不，无须。_______________________________10.你们必须做什么？_______________________________11.在图书馆里我们必须保持平静。

________________________________Yes,hedoes./No,hedoesn’t.Doeshehavetowearauniformatschool?Whatdoyouhavetodo?Wehavetobequietinthelibrary.7/35ObserveandLearnDon’teatintheclassroom.Don’t

fight.Don’t

runinthehallways.Don’tarrivelateforclass.Don’t

listentomusicinclass.Haveathink:祈使句是怎样组成？普通在什么情况下会用祈使句？Don’t…不要做……8/35祈使句普通用来表示请求、命令、劝说、号召、警告等。在祈使句中,通常省略第二人称主语you。必定式以动词原形开头，否定式普通在动词原形前加don’t。祈使句9/35一、祈使句必定式1.以行为动词原形开头，简称Do型。

e.g.Comehere.到这儿来。2.以动词be开头，简称Be型。

e.g.Bequiet,please.请平静。3.以Let开头，简称Let型。e.g.Let’sgo!咱们走吧!

10/35注意：有时可在祈使句句首或句尾加上please，使语气显得客气、有礼貌。假如在句尾加please，应该用逗号与前句隔开。e.g.Gothisway,please.请这边走。11/35二、祈使句否定式1.Do型和Be型否定式是在句首加don’t。e.g.Don’tsithere.不要坐在这儿。

Don’tbelate.别迟到。2.以let开头祈使句，其否定式有两种：一个是直接在句首加don’t，另一个是“let+宾语+not+动词原形+(其它)”。e.g.Don’tlethimgo.不要让他走。Let’snotgothere.咱们别去那儿。12/35注意：“No+名词/动词⁃ing形式”表示禁止或劝戒，惯用于公共场所。e.g.Nophotos!禁止拍照！

Nosmoking！

禁止吸烟！13/35【利用】将以下句子翻译成英语。1.请看这幅图画。2.不要在教室里跑。3.让我们帮助他。Pleaselookatthepicture./Lookatthepicture,please.Don’trunintheclassroom.Let’shelphim.14/354.在图书馆保持平静。5.上课不要迟到。Bequietinthelibrary.Don’tbelateforclass.15/35ObserveandlearnHaveathink:1.情态动词在使用方法上有什么共同点？2.can在本单元主要表示什么含义？它还可表示什么意思？3.haveto在使用方法上与其它情态动词有何区分？情态动词can,must,haveto后面都接动词原形16/35本单元can意为“能够”，表示请求、允许。如:I

can

dance

and

sing.2)can还可表示能力,“能，会”。如:--Can

the

students

run

in

the

hallways?

--Yes,theycan./No,theycan’t.Wecan’teatintheclassroom.

情态动词can17/35必定句:主语+can+动词原形+其它.否定句：主语+cannot/can’t+动词原形+其它.疑问句:Can+主语+动词原形+其它?必定回答：Yes,主语+can.否定回答：No,主语+can’t.情态动词can句型结构:18/35情态动词must表说话人主观看法，表示必须、必要。无人称和数改变，不能单独使用，必须与其后动词原形组成谓语。句型结构：主语+must+动词原形+其它.如:Youmustcomeintime.你必须按时来。

Thechildrenmustbebackbefore6o’clock.孩子们必须6点前回来。情态动词must19/35haveto表示必须,强调客观需要,有不得不、被逼无奈做某事意思。此词现有些人称、单复数改变,也有动词时态改变。其否定形式和疑问句形式均需要借助助动词do才能够进行改变。情态动词haveto20/35haveto句型结构:必定句：主语＋have/has/had

to＋V原形＋其它.否定句：主语+don’t/doesn’t/didn’t

have

to＋V原形＋其它.疑问句:Do/Does/Did＋主语＋have

to＋V原形＋其它?如:Shehastolookafterhermotherathome.Wedon’thavetocleantheroomtoday.--Doeshehavetogotobednow?--Yes,hedoes.//No,hedoesn’t.21/35LibraryRulesDon’ttalk.________________________________________________Writetherulesfortheschoollibrary.Don’tlistentomusic.Don’teatordrink.Don’ttakephotos.3a22/35Bequiet?(she/haveto/inthelibrary)Q:Doesshehavetobequietinthelibrary?A:Yes,shedoes.

Usethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.3b23/352.Eat?(he/haveto/inthedininghall)Q:________________________________?A:_____________3.Listentomusic?(we/can/inthehallways)Q:________________________________?A:_____________4.Wearahat?(we/can/intheclassroom)Q:_____________________________?A:____________Yes,hedoes.DoeshehavetoeatinthedininghallCanwelistentomusicinthehallwaysNo,wecan’t.CanwewearahatintheclassroomNo,wecan’t.24/35Atmydreamschool,wedon’thavetocometoschooleveryday…Wecaneatinclass…Makeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!3c25/35Wedon’thavetowearschooluniforms…Wedon’thavetodohomeworkeveryday…26/35Discussandmakerulesforthecomputerroominyourschool.ComputerRoomRules_____________________________________________________________________________27/35Wemustbequietinthecomputerroom.Don’truninthecomputerroom.Don’teatordrinkinthecomputerroom.Wearslippersinthecomputerroom.28/35ComputerRoomRules_______________________________________________________________________________________________________________________________________________________________________________Wemustbequietinthecomputerroom.Don’teatordrinkinthecomputerroom.Don’truninthecomputerroom.Wearslippersinthecomputerroom.Cleanthecomputerroomeveryday.29/35Don’truninthehallways.Wemustbeontimeforclass.-Canweeatintheclassroom?

No,wecan’t,butwecaneatinthedininghall.-Doeshehavetowearauniformatschool?

Yes,hedoes./No,hedoesn’t.-What

doyouhavetodo?Wehavetobequietinthelibrary.课时重点回顾30/35I.依据句意及括号内所给单词提醒填空。1.Don’t________(be)latenexttime,Jim.2.Ihaveto________(finish)theworkbefore5:00p.m.3.Canwe________(play)gameswiththosegirls?4.Theymust________(think)aboutit.5.Helen,_________(do)thedishesnow.do

befinish

play

think

31/35II.依据括号内要求完成以下各题，每空一词(含缩略形式)。1.

—Cantheyjointhesportsclub?

(补全必定答语)

—Yes,________

________.

2.

Shehastogotobedearly.

(改为普通疑问句并作否定回答)—______

she_______togotobedearly?—________,