R·七年級下冊Unit2NoRules,NoOrder(SectionAGrammarFocus3a-3d)Grammarfocus3aReadthesentence.Circlethewordthatintroducesareason. Walkinthehallway. Don'trun! Bepoliteandtreatoneanotherwithrespect.Don'tlitter./Youmusn’tlitter./Youcan’tlitter.Canwebringourphonestoclass?No,wecan’t.Wemustkeeptheminthelockers.Canweeatsnacksinclass?No,wecan’teatinclass.Wehavetoeatinthedininghall.1.祈使句的概念(1)祈使句一般用來表示請求、命令、勸告、警告、禁止等。祈使句的主語一般是第二人稱you，但往往省略。祈使句的肯定式以動詞原形開頭，否定式在動詞原形前加don’t。句末用句號或感嘆號，讀時用降調(diào)。為表示禮貌，祈使句經(jīng)常在句首或句末加上please。當(dāng)please在句末時，其前通常加逗號。祈使句GrammarFocusReadandjudge(讀句子，并判斷).（）（）（）（）Pleasegivemesomewater.Goout!Makegooduseofyourfreetime,please.Pleasedon’truninthehallways.表請求表命令表勸告表警告Walkinthehallways.Don’trun!Bepoliteandtreatoneanotherwithrespect.Don’tlitter.祈使句的肯定句和否定句是怎樣構(gòu)成的？ReadandthinkDo型肯定句：動詞原形(+其他).去刷牙！否定句：Don’t+動詞原形(+其他).不要亂扔（垃圾）。Goandbrushyourteeth!Don’tlitter.2.祈使句的句式Be型肯定句：Be+表語(+其他).請安靜。否定句：Don’t+be+表語(+其他).不要吵鬧。Bequiet,please.Don’tbenoisy.Let型肯定句：Let+賓語+動詞原形(+其他).讓我?guī)湍惆?。否定句：①Don’tlet+賓語+動詞原形(+其他).②Let+賓語+not+動詞原形(+其他).別讓他走。Letmehelpyou.Don’tlethimgo./Lethimnotgo.其他No+動詞-ing形式/名詞.禁止游泳。禁止拍照。表示強(qiáng)調(diào)時，可在動詞原形前加do，意為“一定，務(wù)必”。一定要來看我。Noswimming.Nophotos.Docometoseeme.注意為表示禮貌，可在祈使句的句首或句末加上please。當(dāng)please在句末時，要用逗號與句子其他部分隔開。請遵守校規(guī)。注意Pleasefollowtheschoolrules.＝Followtheschoolrules,please.Youmustn’tlitter./Youcan’tlitter.Canwebringourphonestoclass?No,wecan’t.Wemustkeeptheminourlockers.Canweeatsnacksinclass?No,wecan’teatinclass.Wehavetoeatinthedininghall.觀察它們在用法上有什么共同點(diǎn)？2.can/must/haveto后面接動詞的什么形式？3.haveto在句法上和其他情態(tài)動詞的區(qū)別在哪里？can/must/haveto+動詞原形haveto與其他情態(tài)動詞不同，有人稱、數(shù)和時態(tài)的變化表示主觀的義務(wù)或必要，無人稱、數(shù)和時態(tài)的變化，意為“必須”。我必須做作業(yè)。Imustdomyhomework.情態(tài)動詞must(2)表示肯定推測，常用于肯定句中，意為“一定、必然”。這個故事一定很有趣。Thestorymustbefunny.2.情態(tài)動詞haveto1)haveto意為“必須；不得不”，后接動詞原形，表示客觀需要做的事情。例：現(xiàn)在我不得不離開。Ihavetoleavenow.2)haveto有人稱、數(shù)和時態(tài)的變化，其第三人稱單數(shù)形式為hasto。過去式為hadto。辛迪每天必須鋪床。Cindyhastomakethebedeveryday.Youdon’thavetoarrivethereateight.haveto/mustcan’t/musn’thaveto/mustmust/havetohaveto/musthaveto/musthaveto/mustwaityourturn等待輪到你v.離開；留下缺席，不在adv.輕聲地；安靜地安全帶穿上，戴上3bCompletethesentencesusingcan,haveto/must,orcan't/mustn't.1.Don'tjumpthequeue.You_____________waitforyourturn.2.You_________________justaskyourteacheraquestioninclass.You______________raiseyourhandfirst.3.A:CanIleavetheclassifIdon'tfeelwell?B:Yes,butyou______________tellyourteacheraboutitwhenyou_______________beabsentfromclass.4.A:Hey!CanIlookatyourbook?B:Shh,we_______________talkquietlyinthelibrary.5.A:Canyouputonyourseatbelt?We___________wearonewhenwe'reinacar.B:Sure.Thanks!●Donoteatordrink.●Noeatingordrinking.●Youcan’t/mustn’teatordrink.3cLookatthefirstsignandreadtherules,Thenwritetherulesfortheothersigns.Donotpark.Noparking.Youcan't/mustn'tpark.Donottakephotos/pictures.Nophotos/pictures.Youcan't/mustn'ttakephotos/pictures.Donotswim.Noswimming.Youcan't/mustn'tswim.Donotfeedthebirds.Nofeedingthebirds.Youcan't/mustn'tfeedthebirds.v.喂養(yǎng)；飼養(yǎng)3dIngroups,brainstormthreerulesforoneoftheplacesbelow.Thendrawsignstoshowtherules.Shareyoursignsinclassandexplainwhattheymean.libraryschooldininghallparkcinemahospitalInthelibrary,wemustkeepquiet.Wemustn’tmakenoise.Wecan’t...保持安靜制造噪音頭腦風(fēng)暴InthelibraryWemustkeepquiet.Wemustn’tmakenoise.Wecan’teatordrinkhere.Wecan’ttakebooksoutofthelibrarywithoutpermission.IntheschooldinninghallWecan’tjumpthequeue.Wecan’twastefood.Wehavetocleanthetablebeforeweleave.IntheparkWecan’tthrowrubbishhereandthere.Wecan’twalkonthegrassandpickflowers.Wecan’tplaywithfire.InthecinemaWemustsitontheassignedseatshownontheticket.Wemustn’tsmokehere.Wemustkeepquietwhilewatching.InthehospitalWemustn’tsmoke.Wehavetobequiet.Don’truninthehallways.Rulesareeverywhereinourdailylife.Weshouldfollowtherulesandmakeaquietandcomfortableplaceforeveryone.

ChecklistBeabletouseimperatives☆☆☆Beabletousethemodalverbsmust/can/haveto☆☆☆Beabletoreadandtellrulesinyourdailylife.☆☆☆Self-assessment單詞rule,order,follow,arrive,uniform,hallway,litter,polite,treat,respect,if,jacket,latefor,ontime,haveto,followrules,bepolite句型-Can+人

?肯定回答-Yes,he/shecan.

Rules:

否定：No,he/shecan’t.He/Shehasto

.Don’tbelateforschool.Arriveontime.Don’tru