英語下冊Unit4Don'teatincalss第2課時SectionAGrammarFocus-3c上課課件

SectionAGrammarFocus-3cUnit4Don’teatinclass.初中英語七年級下冊RJGrammar:

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祈使句(重點為否定結(jié)構(gòu))②情態(tài)動詞can表“許可”的用法(肯定及否定陳述，

一般疑問句結(jié)構(gòu)及肯定和否定回答)③情態(tài)動詞must的句型結(jié)構(gòu)(僅限肯定陳述)④情態(tài)動詞haveto的句型結(jié)構(gòu)(肯定及否定陳述，一般疑問結(jié)構(gòu)及肯定和否定回答)LearninggoalsMinesweeping掃雷游戲單詞下埋著6顆雷，學(xué)生選擇單詞并讀出，如果單詞下沒有雷則可得分，如果有，則不得分。GametimeWarmingup113312222wearfightbequietschooluniformsorrydininghallbringmusthavetodon’tschoolruleseatinclass131142runinthehallwaysarrivelateforclasslistentoontimeoutsideimportanthallcanInclassWecan’t_____________.Wemust_____________.Wehaveto___________.BrainstormAtschoolWecan’t_____________.Wemust_____________.Wehaveto___________.AthomeIcan’t_____________.Imust_____________.Ihaveto___________.Howtotalkaboutrules?Don’truninthehallways.Don’tfight.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan’t.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.Whatdoyouhavetodo?Wehavetobequietinthelibrary.Readandobservethischart.GrammarFocus祈使句的否定句怎樣構(gòu)成？肯定句呢？一般在什么情況下會用祈使句？情態(tài)動詞在用法上有什么共同點？can在本單元主要表示什么含義？它還可表達什么意思？haveto在句法上與其他情態(tài)動詞有何區(qū)別？Workinpairsandanswerthequestions.Don’truninthehallways.Don’tfight.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan’t.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.Whatdoyouhavetodo?Wehavetobequietinthelibrary.祈使句的否定句怎樣構(gòu)成？肯定句呢？祈使句的否定句在動詞原形前加don’t，表示“不要做什么事”。祈使句的肯定句通常是以動詞原形開頭的。Don’truninthehallways.Don’tfight.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan’t.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.Whatdoyouhavetodo?Wehavetobequietinthelibrary.一般在什么情況下會用祈使句？祈使句一般用于上級對下級，長輩對晚輩之間，表示命令、勸說或警告，也可表示請求。情態(tài)動詞在用法上有什么共同點？can,must,haveto后接動詞原形。Don’truninthehallways.Don’tfight.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan’t.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.Whatdoyouhavetodo?Wehavetobequietinthelibrary.can在本單元主要表示什么含義？它還可表達什么意思？can在本單元的主要意義是“能夠；允許”，還可表示“能力”。Don’truninthehallways.Don’tfight.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan’t.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.Whatdoyouhavetodo?Wehavetobequietinthelibrary.haveto在句法上與其他情態(tài)動詞有何區(qū)別？haveto有人稱和數(shù)的變化。Don’truninthehallways.Don’tfight.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan’t.Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.Whatdoyouhavetodo?Wehavetobequietinthelibrary.祈使句一般用來表示請求、命令、勸說、號召、警告等。在祈使句中，通常省略主語you，其肯定形式以動詞原形開頭，否定形式是在動詞原形前加don’t。祈使句句尾用句號或感嘆號，讀時用降調(diào)。為表示禮貌，可以在句首或句尾加上please。句末用please時，前面通常加逗號。語法概述肯定句：動詞原形(+賓語)+其他.否定句：Don’t+動詞原形(+賓語)+其他.Weartheschooluniformonweekdays,please.上學(xué)日請穿校服。Don’twatchTVbeforedinner.晚飯前不要看電視。Do型祈使句的構(gòu)成肯定句：Be+表語+其他.否定句：Don’t+be+表語+其他.Becarefulnexttime.下次要細心。Don’tbelateforschool!上學(xué)不要遲到!Be型祈使句的構(gòu)成更多講解詳見英語RJ七下《教材幫》Unit4語法幫肯定句：Letsb.dosth.+其他.否定句：Don’t+letsb.dosth.+其他.或Letsb.notdosth.+其他.Let’shavearest.咱們休息一下吧。Don’tlethimgoswimming.=Lethimnotgoswimming.不要讓他去游泳。Let型祈使句的構(gòu)成其他類型的否定祈使句(1)No+v-ing!/No+名詞!Nofishing!禁止釣魚!Noparking!禁止停車!Nophotos!禁止拍照!(2)never代替don’t來加強語氣。Nevergiveup!決不放棄!情態(tài)動詞haveto與must語法示例Wemustbeontime.我們必須準(zhǔn)時。Doeshehavetowearauniformatschool?他在學(xué)校必須穿校服嗎？Hehastoliveatschoolbecausehishomeisfarawayfromschool.他不得不住校，因為他家離學(xué)校很遠。GrammarFocus二者均可表示“必須”，其后均接動詞原形。It’stoolate.Ihavetotakeataxi.太晚了，我必須乘出租車。Imustgonow.我必須現(xiàn)在就走。haveto與must的共同點haveto與must的不同點haveto強調(diào)因客觀因素影響而不得不做某事，跟主觀意愿無關(guān)，通常上下文中會有暗示客觀因素的句子，多譯為“不得不”。must表示因主觀需要或責(zé)任感的驅(qū)使而有必要或義務(wù)去做某事，多譯為“必須”。haveto可用于不同的時態(tài)，有人稱和數(shù)的變化，其一般現(xiàn)在時的第三人稱單數(shù)形式為hasto；過去式為hadto。must一般只用來表示現(xiàn)在，沒有人稱和數(shù)的變化。havetohaveto的否定形式為don’t/doesn’t/didn’thaveto，表示“不必”。mustmust的否定形式為mustn’t，表示“禁止，不準(zhǔn)“。Hehastoleaveschoolbecausehisfamilyispoor.因為家里窮，他不得不退學(xué)。(受客觀因素影響)Wemustdosomethingaboutit.關(guān)于這件事我們必須做點什么。(責(zé)任感的驅(qū)使)【拓展】以must開頭的一般疑問句的肯定回答用must，否定回答用needn’t或don’thaveto?！狹ustIleavenow?我現(xiàn)在必須離開嗎？—Yes,youmust./No,youneedn’t(don’thaveto).是的，你必須。/不，你不必。Lookatthepicturesin3aandanswerthequestions.12341.Whatcan’tstudentsdoinpicture2?2.Canwetalkloudly/eat/listentomusic/takephotosinthelibrary?3.Wherecanyouseethesesigns?3aWritetherulesfortheschoollibrary.LibraryRules1.____________________________2.____________________________3.____________________________4.____________________________Don’ttalk.1234Don’teatinthelibrary.Don’tlistentomusicinthelibrary.Don’ttakephotosinthelibrary.Q:__________________________________(he/haveto/inthedininghall)?A:__________________________________3bUsethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.Q:Doesshehavetobequietinthelibrary?(she/haveto/inthelibrary)?A:Yes,shedoes.Bequiet?Doeshehavetoeatinthedininghall?Yes,hedoes.Eat?Q:_________________________________(we/can/inthehallways)?A:_________________________________Listentomusic?Canwelistentomusicinthehallways?No,wecan’t.Wearahat?Q:_________________________________(we/can/intheclassroom)?A:_________________________________Canwewearahatintheclassroom?No,wecan’t.wearahat?Listentomusic?Eat?Dowehaveanylibraryrulesinourschool?Askandanswerinpairs.Doyouhaveto...inthelibrary?Yes,.../No,...Bequiet?thestudents/haveto/cleanclassroom/everydayshe/haveto/beathome/atfiveo’clockshe/haveto/domorningreading/everydaywe/can/arriveatschool/lateMakemoreconversationsusingthesewords.3cMakeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!Atmydreamschool,wedon’thavetocometoschooleveryday.We...一、單項選擇

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David,_______maketroubleatschool.can’tB.don’tC.doesn’tBBExercises

3.Buses_______stopwhenthetrafficlightsturnred.A.canB.mayC.mustC4.

Weshouldkeepquietinthelibrary.We_____speakloudly(大聲地).A.mustB.mustn’t

C.canD.needn’tB

5.I_____gonow,orI’llmissmytrain.A.canB.mightC.mustD.could6.He_____stayathome,becauseit’srainingoutside.A.havetoB.hasto