R七年級(jí)下冊(cè)Unit4Don’teatinclass.

第2課時(shí)Lead-inTellothersaboutyourschoolrules.(Youcanfinishitbyyourself/withyourpartner)listentomusicInourschool,wecan’tlistentomusicinclass,butwecanlistentoitafterclass.Inourschool,wecan’tlistentomusicinclass,butwecanlistentoitafterclass.Whataretherulesinyourschool?Role-playGrammarFocusDon’truninthehallways.Don’tfight.Whataretherules?Canweeatintheclassroom?Wemustbeontimeforclass.No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Doeshehavetowearauniformatschool?Whatdoyouhavetodo?Yes,wecan./No,wecan’t.Yes,hedoes./No,hedoesn’t.Wehavetobequiteinthelibrary.祈使句的用法1.祈使句的概念(1)祈使句是指用來(lái)表示請(qǐng)求、命令、叮囑、建議等的句子。

祈使句沒有主語(yǔ)，謂語(yǔ)動(dòng)詞用原形，句末使用感嘆號(hào)或者句號(hào)。例：站起來(lái)！一定要按時(shí)。（命令）(叮囑)Standup!Besuretobeontime.(2)如果祈使句表示客氣地請(qǐng)求，一般要加上please。please可以放在句子前面也可以放在句子的后面。例:請(qǐng)跟我讀。Pleasereadafterme.（請(qǐng)求）=Readafterme,please.2.祈使句的形式(1)let開頭的祈使句的肯定句：Let’s+not+v.（原形）.例:咱們別那樣做了。Don’tletthemcomein.Let’snotdothatagain.否定形式為：Don’t+let+第三人稱代詞+v.（原形）.例:不要讓他們進(jìn)來(lái)。

(2)非let開頭的祈使句的肯定句和否定句：肯定句Do型Be型v.原形（+賓語(yǔ)）+其他成份.Be+表語(yǔ)(名詞或形容詞）+其他成份.例：Listentome,please.請(qǐng)聽我說。例：Bequiet,please.請(qǐng)安靜。否定句Don’t+行為動(dòng)詞+其他.Don’t+be+其他.No+n./v.-ing.例:Don’tplaycomputergames.不要玩電腦游戲。例:Don’tbelateagain.不要再遲到。例:Nophotos.不許拍照。Noswimming.不許游泳。3.祈使句的用法主語(yǔ)是you常省去，動(dòng)詞原形開頭記。否定形式要注意，句首要把don’t加。要講客氣用please,句首、句末沒關(guān)系。情態(tài)動(dòng)詞must與haveto1.情態(tài)動(dòng)詞must的用法(1)表示有做某一個(gè)動(dòng)作的必要和義務(wù)，它的意思是“必須、應(yīng)該”。例:你必須做你的作業(yè)。

Youmustdoyourhomework.(2)表示有很大把握的判斷或者推測(cè)，它的意思是“一定、準(zhǔn)是”。(3)以must開頭的一般疑問句，它的否定回答用needn’t(不必要),不用mustn’t(不允許),mustn’t常用于否定句中，表示“不允許，禁止”。例:那個(gè)高個(gè)子男人一定是你的爸爸。Thetallmanmustbeyourfather.例:你的車不允許停在這兒。Youmustn’tparkyourcarhere.2.情態(tài)動(dòng)詞haveto的用法haveto表示客觀需要做的事情，意思是“必須，不得不”。(1)haveto后接動(dòng)詞原形，意為“必須做……；不得不做……”。例:我不得不離開了。Ihavetoleave.(2)haveto有人稱、數(shù)和時(shí)態(tài)的變化，其第三人稱單數(shù)形式為hasto。例:她不得不做作業(yè)。Shehastodoherhomework.(3)含有haveto,hasto的句子變疑問句或否定句需分別借助助動(dòng)詞do,does。例:他們必須早起嗎？Dotheyhavetogetupearly?Writetherulesfortheschoollibrary.3aLibraryRules1.__________________2.__________________3.__________________4.__________________Don’ttalkDon’teatordrinkDon’tlistentomusicDon’ttakephotosUsethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.3bBequiet?(she/haveto/inthelibrary)Q:Doesshehavetobequietinthelibrary?A:Yes,shedoes.

2.Eat?(he/haveto/inthedinninghall)Q:_________________________________________A:_________________________________________Doeshehavetoeatinthedininghall?Yes,hedoes.3.Listentomusic?(we/can/inthedininghall)Q:_________________________________________A:_________________________________________4.Wearahat?(we/can/intheclassroom)Q:_________________________________________A:_________________________________________Canwelistentomusicinthedininghall?No,youcan’t.Canwewearahatintheclassroom?No,youcan’t.Makeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!3c1.Wecaneatinclass.2.Wedon’thavetocometoschooleveryday.3.…Atmydreamschool,wedon’thavetocometoschooleveryday.Wecaneatinclass.We…Languagepoints1.Wedon’thavetocometoschooleveryday.

我們不必每天來(lái)學(xué)校。haveto為固定短語(yǔ)，意為“不得不，必須”，其后接動(dòng)詞原形，有時(shí)態(tài)和人稱的變化。haveto的否定形式是：主語(yǔ)+don’t+haveto+動(dòng)詞原形+其他.（一般現(xiàn)在時(shí)，當(dāng)主語(yǔ)是第三人稱單數(shù)時(shí)，用doesn’tto，—般過去式用didn’thaveto)Exercise一.單項(xiàng)選擇()1.______withfire.It’sverydangerous.

A.Playing

B.PlayC.Don’tplayD.Doesn’tplay

()2.Thechildren_____playfootballontheroad.

A.can

B.must

C.mustn’t

D.mayCC()3.Mysister______beatschoolbyseveno’clock.

A.hasto

B.haveto

C.hadto

D.mustto

()4.It’srainingallday,somybrother______stayathome.

A.must

B.haveto

C.mustto

D.hasto

AD()5.It’sverywarmoutside.You______wearthecoat.A.havetoB.hadn’ttoC.don’thavetoD.mustn’t()6.Mary,______inbed.A.notreadB.don’treadC.noreadingD.doesn’treadCBR七年級(jí)下冊(cè)Unit4Don’teatinclass.

Lead-inDoyouhaveanyrulesathome?Doyouhavetodoyourhomeworkfirstafterschool？CanyouwatchTV?Doyouhavetoplaythepiano？Canyouplaywithyourfriends?Readtherulesinthechartin1b.Thenmatchthepictures[a-h]withtherules.1a___

goout___seefriends___dohishomework___practicetheguitar___dothedishes___watchTV___helphismommakebreakfast___cleanhisroom___

goout___seefriends___dohishomework___practicetheguitar___dothedishes___watchTV___helphismommakebreakfast___cleanhisroomahcebgdfListenandputan×forthingsDavecan’tdoanda√forthingshehastodo.1bRulesCan’t(×)Haveto/must(√)gooutseefriends××dohishomeworkpracticetheguitardothedisheswatchTVhelphismommakebreakfastcleanhisroom√√√×√√Listenagain.WritewhenDavehastofollowtherulesinthechartin1b.Choosefromthephrasesinthebox.1conschoolnightsonschooldayseverySaturdayafterdinnerbeforedinnerafterschoolintheeveningeverymorningRulesWhengooutseefriendsdohishomeworkpracticetheguitaronschoolnightsonschooldaysafterschoolbeforedinnerdothedisheswatchTVhelphismommakebreakfastcleanhisroomafterdinnereverymorningeverySaturdayintheeveningTalkabouttherulesinDave’shouse.1dCanDavegooutonschoolnights?No,hecan’t.CanhewatchTVintheevening?No,hecan’t.Doeshehavetopracticetheguitarbeforedinner?Yes,hedoes.Languagepoints1.helphismommakebreakfast幫他的媽媽做早飯helpsb.(to)dosth.幫助某人做某事helpsb.withsth.例:我?guī)蛬寢屪黾覄?wù)。Ihelpmymomdohousework.=Ihelpmymomwithhousework.makebreakfast做早飯make的多種語(yǔ)意：makethe/one’sbedmaketeamakedumplingsmakefriendsmakerulesmakeanoise做，制作整理床鋪沏茶包餃子交朋友制訂規(guī)則制造噪音2.onschoolnights在上學(xué)期間的晚上night介詞on介詞at泛指在晚上指具體的某個(gè)晚上,需有其他詞修飾例:在冬天的晚上