Unit2SectionAGrammarFocus3a-3d课件人教版英语七年级下册

人教版英语7年级下册培优备课精做课件SectionAWhatrulesdowefollow?Lesson3GrammarFocus(3a-3d)Unit2NoRules,NoOrder授课教师：Home.

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2026年3月27日GrammarFocus祈使句（ImperativeSentences）祈使句一般用来表示请求、命令、劝说、号召、警告等。祈使句的主语一般是第二人称you，但往往省略。祈使句的肯定式以动词原形开头，否定式在动词原形前加don't。e.g.Justgoalongthisstreetandturnleft.Becarefulwhenyoucrossthestreet.Practisetheguitareveryday.Don'tbelateforclass.Don'tfight.祈使句的种类及构成肯定的祈使句：动词原形+其他.e.g.Walkinthehallway.Standup!Bepolite.Keepquiet.Beagoodboy.否定的祈使句：Don’t+动词原形+其他.e.g.Don’truninthehallways.Don’tlitter!Don’tbelate.let型祈使句：Let+第一/三人称+动词原型+其他.e.g.Letmetellyouthewaytomyhouse.Let’sseethelions.Lethimgo.一、用can,haveto/must,can’t或mustn’t填空。（5分）1.Ilikedoingmorningexercises.It________helpmekeephealthy.2.You________playsoccerontheroad!It’stoodangerous.3.—________Icleantheroomnow? —No,youneedn’t.Youcandoitthisevening.canmustn'tMust二三四五一六七4.It’srainingoutside.I________takeanumbrellatoschool.5.Helen________goshoppingwithmebecausehermotherneedshertohelpwithhousework.二三四五一六七havetocan'tNo型祈使句：No+名词/动名词.e.g.Noparking.禁止停车。Nophotos.禁止拍照。Noentry.禁止进入。Readthesentences.Dotheverbsinboldneedtochangeforms?Why?Walkinthehallway.Don’trun!Bepoliteandtreatoneanotherwithrespect.Don’tlitter./Youmustn’tlitter./Youcan’tlitter.Canwebringourphonestoclass?No,wecan’t.Wemustkeeptheminourlockers.Canweeatsnacksinclass？No,wecan’teatinclass.Wehavetoeatinthedininghall.祈使句中的动词原型，不需要变换形式。

情态动词后用动词原型。3a情态动词（ModalVerbs）情态动词表示说话人的语气和情态，如请求、许可、意愿、可能等。一般没有人称和数的变化。情态动词本身不能单独作谓语，必须和动词原形连用。情态动词的否定式一般是在其后加not构成，一般疑问句通常将它提到句首。情态动词的肯定式一般不重读。情态动词can1.表示能力（七上Unit5已经学习）

e.g.Icanrunfast,butIcan’tswim.2.表示许可（本单元重点）

e.g.Wecanplaybasketballattheweekend.Studentscan’truninthehallways.Canwebringourphonestoclass?情态动词must1.表示“必须”，否定形式mustn’t表示“禁止”e.g.Don’tarrivelateforclass.Wemustbeontime.Studentsmustn’tusetheirphonesatschool.2.以must开头的一般疑问句，肯定回答用must，否定回答

用needn’t或者don’thaveto，

表示“不必要”e.g.—MustIcleantheclassroomnow?

—Yes,youmust./No,youneedn’t/don’thaveto.情态动词haveto表示“不得不；必须”,在表示“必须”时，与must意义接近，有时可互换。e.g.Wehavetobequietinthelibrary.Shehastodoherhomeworkfirstwhenshegetshome.Wehaveto/mustfollowtherules.1.must表示说话人的主观看法，语气较为强烈，haveto则

强调客观需要。must与haveto区别

e.g.Wemusthurry.Idon’twanttomissthebeginingoftheshow.Wehavetohurry.Thetrainisleavingin5minutes.2.它们的否定式含义大不相同。mustn’t表示“不准；禁止”，

don’thaveto表示“不必”。e.g.Youmustn'ttalktoyourmotherlikethat.

Youdon'thavetocomeifyoudon'twantto.3.must没有人称和数的变化，而haveto有人称和数的变化。e.g.I/We/You/Theymustdosomethingaboutit.

Ihavetofinishmyworktoday.

Shehastoworklatetoday.

Theyhavetogettothestationbeforefiveo'clock.1.Don'tjumpthequeue.You____________waitforyourturn.2.I__________feedmydogmanykindsoffood,butI

_____________givehimchocolate.It’sbadforhim!3.A:CanIleavetheclassroomifIdon'tfeelwell?

B:Yes,butyou__________tellyourteacheraboutitwhenyou__________beabsentfromclass.Completethesentencesusingcan,haveto/must,orcan’t/mustn't.haveto/mustcancan’t/mustn’tmusthaveto3b4.

A:Hey!CanIlookatyourbook?

B:Shh,we____________talkquietlyinthelibrary.5.A:Canyouputonyourseatbelt?We____________wearonewhen

we'rein

acar.

B:Sure.Thanks!must/havetomust/haveto二、选词并用其适当形式填空。（5分）6.Nooneknowswhyheis______fromthemeeting.7.Whenweareinacar,wemustwearourseat________.8.Myfatherhasabigfarm,andhe________lotsofanimalseveryday.二三四五一六七feed,belt,quiet,leave,absentabsentbeltsfeeds9.［重庆第二外国语学校期中］Don’tmakenoise.Wemusttalk_________inthelibrary.10.Jimusually________hishomeat7:30andgetstoschoolat7:50.二三四五一六七feed,belt,quiet,leave,absentquietlyleavesLookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns.Donoteatordrink.Noeatingordrinking.Youcan't/mustn'teatordrink.3cDonotparkhere.Noparking.Youcan't/mustn'tparkhere.Donottakephotoshere.Nophotos.Youcan't/mustn'ttakephotoshere.Donotswimhere.Noswimming.Youcan't/mustn'tswimhere.Donotfeed.Nofeeding.Youcan't/mustn'tfeed.Ingroups,brainstormthreerulesforoneoftheplacesbelow.Thendrawsignstoshowtherules.Shareyoursignsinclassandexplainwhattheymean.library

schooldininghall

park

cinema

hospitalInthelibrary,wemustkeepquiet.wemustn’tmakenoise.Wecan’t...3dLibraryRulesKeepquiet.Noeatingordrinking.Returnbooksontime.Silenceyourmobilephone.Inthelibrary,wemustkeepquiet.Wemustn’tmakenoise.Wecan’teatordrinkinthelibrary.Becauseitmaymakethelibraryuntidy.Wemustreturnbooksontime.Lastbutnottheleast,wehavetomakeourmobilephonessilent.LibraryRules三、根据汉语意思完成句子。（11分）11.插队是不礼貌的。

It’snotpolite__________________________________.12.我现在很忙。你不需要等我。

I’mbusynow.Youdon’tneedto_______________me.tojumpthequeuewaitfor点拨：由句意可知，空格处缺少动词短语“等待”，空格前为不定式符号，故用动词原形，填waitfor。wait其他常见用法：can'twaittodosth.迫不及待要做某事。二三四五一六七13.［重庆北碚区月考改编］Luke今天病得很严重，因此他没来上学。Lukeisbadlyilltodaysohe________________school.14.该上课了，不要在教室里制造噪音了。

It’stimeforclass.Don’t_________________intheclassroom.isabsentfrommakenoise二三四五一六七四、按要求完成句子，每空一词(含缩略形式)。（23分）15.Mysistercanplaythepianowell.(改为一般疑问句，并作肯定回答)

—__________________________________thepianowell? —________,_________________.二三四五一六七CanyoursisterplayYesshecan16.Youmustfinishyourhomeworknow.(改为一般疑问句，并作否定回答) —_________________________myhomeworknow? —No,__________________________________.17.Openthedoor.(改为否定句) _________________thedoor.MustIfinishyoudon'thaveto二三四五一六七Don'topen18.Youcan’tlitterinthelibrary.(改为祈使句) _________________inthelibrary.19.Youshouldrespectandbepolitetooldpeople.(改为祈使句) __________________________________________ oldpeople.Don'tlitterRespectandbepoliteto二三四五一六七五、根据所给图片及提示词，写出恰当的句子。（4分）20.(not,here) ____________________________________21.(no,eat,hall)

____________________________________二三四五一六七Don't/Donottakephotoshere.Noeatinginthehall.22.(not,in,class) ____________________________________23.(you,must,lake) ____________________________________Don't/Donotlistentomusicinclass.Youmustn'tswiminthelake.二三四五一六七六、情境串考点短文填空。（20分）选择恰当的情态动词或助动词填空。Katewillgotohernewschool.Shedoesn’twanttobelateonthefirstschooldaysoshe24.__________(can/hasto)leavehomeearly.WhenKategetstoschool,shemeetsherteacherMissSmith.“Welcome,Kate!”MissSmithsays.“I’llshowyouaroundyournewschool.”二三四五一六七hastoFirst,theywalktothehallway.“25.________(Can’t/Don’t)runinthehallways,”MissSmithsaystosomeboys.Thentheycometotheclassroom.“Thisisyourlocker,Kate.You26._________(must/don’thaveto)rememberthepassword（密码）.Andyou27.____________(can/haveto)leaveyourbagandjackethere,”MissSmithtellsKate.二三四五一六七Don'tmustcan“Isee,MissSmith,”Katesays.Thentheycometotheplayground.“Kate,you28.________(can/can’t)dosportswithyourclassmateshere,butyou29.__________(can’t/don’thaveto)takeanyfoodhere,”MissSmithsays.“Iwillrememberthat,”Katesays.二三四五一六七cancan't“MissSmith!”agirlnamedGracecalls.“Jimthrew（扔）aballatme!”“Jim,30.___________(don’t/doesn’t)dothat.Nowyou31._____________(must/don’thaveto)saysorrytoGrace,”MissSmithsays.“Andyou32.____________(haveto/don’thaveto)besurenottodothatagain.”二三四五一六七don'tmusthaveto“Sorry,Grace,”Jimsays.It’stimeforclass.Kateandallherclassmates33._____________(can/must)gobacktoclass.二三四五一六七must七、前沿科技·DeepSeek

重庆期中任务型阅读。（8分）根据短文内容，完成下面的表格，每空一词。DeepSeekisaveryusefulkindofAI.Itcandomanythingstohelpusinourdailylifeandstudy.WhenweuseDeepSeektostudyEnglish,itcangiveusgoodadviceongrammar（语法）andvocabulary（词汇）.Butweshouldnotjustbelieve（相信）it.Weneedtothinkon二三四五一六七