七下Unit2

NoRules,NoOrder

SectionA3a-3dGrammar祈使句

和

情態(tài)動詞的用法總結(jié)Walkinthehallway.Bepoliteandtreatoneanotherwithrespect.Canwebringourphonestoclass?Canweeatsnacksinclass?Don’trun!Don’tlitter./Youmustn’tlitter./Youcan’tlitter.No,wecan’t.Wemust

keeptheminourlockers.No,wecan’teatinclass.Wehavetoeatinthedinninghall.3a.Readthesentences.Dotheverbsinboldneedtochangeforms?Why?禮貌待人，互相尊重。我們可以帶手機來上課嗎?

我們能在課堂上吃零食嗎?不要跑！不要亂扔垃圾。/你一定不能亂扔垃圾。/你不能亂扔垃圾。不，我們不能。我們必須把它們放在儲物柜里。不，我們不能在課堂上吃零食。我們必須在餐廳吃。3aTranslatethesentences.

在走廊里走。

發(fā)現(xiàn)歸納：祈使句

祈使句是用來表示請求、命令、勸告、警告、禁止等語氣的句子。一般省略主語_____________。肯定式以___________開頭，否定式在動詞原形前加___________。you動詞原形don’t祈使句類型：1.Do型

動詞原形+其他2.Be型Be+表語3.Let型

Let+賓語+動詞原形4.No型No+V-ing./No+n.

Do型,Be型

和Let型

的否定形式都是在句首加____________.Don’t情態(tài)動詞can,haveto,must：canhavetomust含義1.表能力，意為“能；會”2.表請求、許可，意為“可以”不得不；必須(客觀)必須(主觀)例句Icansing,butIcan’tdance.We

havetoweartheschooluniform.

Wemustbeontime.共同點后跟動詞原形后跟動詞原形后跟動詞原形情態(tài)動詞否定形式：can’t,don’thaveto,mustn’t：can’tdon’thavetomustn’t含義不能；不可以不得不；必須表示禁止,“一定不能;不許”.例句Wecan’teatsnacksinclass.We

don’t

havetoweartheschooluniformathome.

Wemustn’tbelatefoeschool.共同點后跟動詞原形后跟動詞原形后跟動詞原形3b.Completethesentencesusingcan,

haveto

/

must,

can’t

/mustn't.1.Don’tjumpthequeue.You_____________waitforyourturn.2.I______feedmydogmanykindsoffood,butI____________givehimchocolate.Itisbadforhim!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!haveto/mustcancan’tmusthavetohaveto/musthaveto/must3c.Lookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns.Donoteatordrink.Noeatingordrinking.Youcan’t/mustn’teatordrink.Donotpark.Noparking.Youcan’t/mustn’tpark.Donottakephotos.Nophotos.Youcan’t/mustn’ttakephotos.3c.Lookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns.Donotswim.Noswimming.Youcan’t/mustn’tswim.Donotfeedthebirds.Nofeeding.Youcan’t/mustn’tfeedthebirds.3c.Lookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns.3d.Ingroups,brainstormthreerulesforoneoftheplacesbelow.Thendrawsignstoshowtherules.Shareyoursignsinclassandexplainwhattheymean.library

schooldininghall

park

cinema

hospitalInthelibrary,wemustkeepquiet.Wemustn’tmakenoise.Wecan’teatsnacks.Wecan’t...3d.Ingroups,brainstormthreerulesforoneoftheplacesbelow.Thendrawsignstoshowtherules.Shareyoursignsinclassandexplainwhattheymean.library

schooldininghall

park

cinema

hospitalIntheschooldininghall,wemustn’tlitter.Wecan’tfight.Wecan’twastethefood.Wecan’t...根據(jù)漢語意思完成英語句子，每空一詞。1.不要插隊。那是不禮貌的。_______________________________.That'snotpolite.2.請每天準(zhǔn)時到校。___________________school_____________everyday.3.你絕不能缺席今天下午的會議。

You_______________________________________theme