初中英語 七年級下冊 Unit4 Don't eat in class.sectionA(grammar focus-3c)課件

中物理Unit4Don’teatinclass.

SectionA(grammarfocus-3c)初中英語/人教版/七年級下冊TolearnImperativesDon’t…:Don’truninthehallways.Tolearntousecanforpermission:Canweeatintheclassroom?Tolearntousemodalverbshaveto&must:Wehavetobequietinthelibrary.Wemustbeontimeforclass.libraryDoyouknowtherulesintheseplaces?dininghallDoyouknowtherulesintheseplaces?hallwaysDoyouknowtherulesintheseplaces?classroomDoyouknowtherulesintheseplaces?Doyouknowtherulesfortheschoollibrary?Don’ttalk.Don’ttalk.Doyouknowtherulesfortheschoollibrary?Don’teatinthelibrary.Don’tsinginthelibrary.Doyouknowtherulesfortheschoollibrary?Don’ttakepictures/photosinthelibrary.Doyouknowtherulesfortheschoollibrary?GrammarFocusDon’truninthehallways.Don’tfight.Whataretherules?Canweeatintheclassroom?Wemustbeontimeforclass.No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Doeshehavetowearauniformatschool?Whatdoyouhavetodo?Yes,wecan./No,wecan’t.Yes,hedoes./No,hedoesn’t.Wehavetobequietinthelibrary.祈使句1.祈使句的定義(1)用來表示請求、命令、勸告、警告、禁止等的句子叫祈使句。祈使句因?qū)ο螅ㄖ髡Z）都是第二人稱，所以通常省略主語(you)而以動詞原形開頭，句末用句號或感嘆號，讀時用降調(diào)。SummaryPleasebringsomewatertome.

請給我拿點水來。（表請求）Goout!出去?。ū砻睿〥on’truninthehallways.

不要在走廊里跑。（表勸告）Becareful!小心?。ū砭妫㎞oeating!禁止吃東西！（表禁止）??????????????????????????????2.祈使句的句式Do

型肯定句：動詞原形（+賓語）+其他.請坐。否定句：Don’t+動詞原形（+賓語）+其他.不要在這兒跑。Sitdown,please.Don’trunhere.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/名詞!禁止游泳！禁止拍照！(1)表示強調(diào)時，可在動詞原形前加do，意為“一定，務(wù)必”。一定要來看我。注意Noswimming!Nophotos!Docometoseeme.(2)為表示禮貌，可在祈使句的句首或句末加上please。

當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.Whataretherules?Wemustbeontimeforclass.Canweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.Canwewearahatinclass?Yes,wecan./No,wecan’t.Does

hehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.Whatdoyouhavetodo?Wehavetobequietinthelibrary.can/must/haveto+動詞原形haveto與其他情態(tài)動詞不同，有人稱和數(shù)的變化情態(tài)動詞must與haveto1.情態(tài)動詞must的用法(1)意為“必須”，表示主觀的義務(wù)或必要，無人稱、數(shù)和時態(tài)的變化。以must開頭的一般疑問句，肯定回答一般用must，否定回答一般用needn’t或don’t/doesn’thaveto，意為“不必”，不用mustn’t；mustn’t

常用于否定句中，表示“不允許；禁止”。我必須做作業(yè)。你不能在這兒游泳。我們必須馬上打掃教室嗎？不，你們不必。你們可以放學后打掃。—________wecleantheclassroomatonce?—No,you_______.Youmaycleanitafterschool.Mustneedn’tImustdomyhomework.Youmustn’tswimhere.(2)意為“一定；準是”，表示肯定推測，用于肯定句中。這本書一定是瑪麗的。

ThebookmustbeMary’s.2.情態(tài)動詞haveto的用法(1)haveto意為“必須；不得不”，后接動詞原形，表示客觀需要做的事情。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。辛迪每天必須鋪床。

Cindyhastomakethebedeveryday.(3)含有haveto或hasto的句子需分別借助助動詞do

或does

構(gòu)成疑問句或否定句。她必須早起嗎？

你不必8點鐘到那兒。

Doesshehavetogetupearly?Youdon’thavetoarrivethereateight.Writetherulesfortheschoollibrary.3aLibraryRules1.__________________2.__________________3.__________________4.__________________Don’ttalk.Don’teatordrink.Don’tlistentomusic.Don’ttakephotos.Usethewordstomakequestionsabouttherules.Thenwriteanswersaccordingtoyourschool.3b1.Bequiet?(she/haveto/inthelibrary)Q:Doesshehavetobequietinthelibrary?A:Yes,shedoes.

2.Eat?(he/haveto/inthedininghall)Q:_________________________________________A:_________________________________________Doeshehavetoeatinthedininghall?Yes,hedoes.3.Listentomusic?(we/can/inthehallways)Q:_________________________________________A:_________________________________________4.Wearahat?(we/can/intheclassroom)Q:_________________________________________A:_________________________________________Canwelistentomusicinthehallways?No,wecan’t.Canwewearahatintheclassroom?No,wecan’t.Makeupfivecoolrulesforyourdreamschool.Shareyourruleswiththeclass.YourclassmatesvotefortheCoolestSchool!3c1.Wecaneatinclass.2.Wedon’thavetocometoschooleveryday.3.…Atmydreamschool,wedon’thavetocometoschooleveryday.We…DiscussionAtmydreamschool,wedon’thavetocometoschooleveryday.Wecaneatinclass.Wedon’thavetowearschooluniform.Wecanlistentomusicinclass.ReportAtmydreamschool,Wecan__________________.Wecan’t_________________.Wedon’thaveto__________.Wedon’thaveto__________.Wehaveto/must_________.Makeupthecoolrulesforyourdreamschool.Summary語法

1.

祈使句的三種類型用法

Don’truninthehallway.2.情態(tài)動詞can,must,haveto的用法

Canwewearahatinclass?Wemustbeontimeforclass.Wehavetobequietinthelibrary.一、單項選擇。1.____listentomusicintheclassroom.A.Not

B．No

C．Don't2.Tom，please____theclassroomnow.A.cleanB．tocleanC．cleans3.Let's____ontimeforclasses.A.beB．benotC．a(chǎn)re4.Shehasto____herhomeworkeverynight.A.doesB．doC．doing5.Sorry，you____playbasketballintheclassroom.A.can'tB．don'tC．don'thavetoCAABAExercise二、按要求完成句子。6.Lilycanplaytheguitar.(改為一般疑問句并作否定回答)

—_____Lily_____theguitar?

—____，she______．7.Jackhastoplaythepianoeveryweekend.(改為一般疑問句)_____Jack________playthepianoeveryweekend?8.Bequick.(改為否定句)__________________________________9.Youcan'teatfoodinclass.(改為祈使句)___________________________________10.Youcan'tbelateforclassnexttime.(改為祈使句)_____________________________________CanplayNocan'tDoeshave

to

Don'tbequick.Don'teatfoodinclass.Don'tbelateforclassnexttime.11.Hehastoeatbreakfastquickly.(改為一般疑問句