Unit4Don’teatinclass.SectionA(GrammarFocus-3c)Ⅰ.选句子配图Don’ttalk.Don’tlistentomusic.Don’teat.Don’ttakephotos.答案:1.Don’teat.2.Don’ttalk.3.Don’ttakephotos.4.Don’tlistentomusic.Ⅱ.句型展示1.——她必须在图书室里保持安静吗?——是的。—shequietinthelibrary?—Yes,she.答案:Does;havetobe;does2.——我们能在走廊里听音乐吗?——不,不能。—wemusicinthehallways?—No,you.3.我们不必天天来上学。Wecometoschooleveryday.答案:2.Can;listento;can’t3.don’thavetoDoeshehavetowearauniformatschool?在学校里他必须穿着校服吗?【自主领悟】(1)haveto为情态动词,“意为必须,”不得不,后接动词原形,有人称、时态和数的变化。其第三人称单数形式为hasto,过去式为hadto。例如:It’stoolate.Ihavetogohome.太晚了。我必须回家了。(2)haveto的否定形式和疑问形式要借助于do/does/did等助动词来表示。例如:Youdon’thavetocleantheroomnow.你现在没必要打扫房间。【用法辨析】haveto与must的区别haveto“”强调客观上要求不得不must“强调个人主观感觉必须;”有必要。没有人称、时态和数的变化。mustn’t“”意为禁止【图解助记】【活学活用】①他今天得去看望他爷爷。Hevisithisgrandfathertoday.②今天你不必穿校服。Youwearyourschooluniformtoday.③你必须买票进电影院。Youatickettogointothecinema.答案:hasto①②don’thaveto③mustbuyⅠ.单项选择1.—Canwewearhatsinclass?—.A.Yes,wedoB.No,wedon’tC.Yes,wecanD.Yes,wecan’t2.—CanIuseyourruler?—Yes,you.A.mayB.needC.canD.must3.—doyouhavetodoafterschool?—Domyhomework,ofcourse.A.WhatB.WhenC.WhereD.How4.—lateforschoolagain.—Sorry,Iwon’t.A.NotbeB.Don’tbeC.NotD.Don’t5.Whichofthefollowingpicturesmeans“Pleasebequiet”?Ⅱ.句型转换1.Wehavetostayathome.(改为一般疑问句)youtostayathome?2.Bobhastogethomebeforenineo’clock.(改为否定句)Bobgethomebeforenineo’clock.3.Wecanwearourownclothes.(改为一般疑问句,并作否定回答)—youyourownclothes?—No,we.答案:1.Do;have2.doesn’thaveto3.Can;wear;can’tⅢ.将Ⅰ栏中的问句和Ⅱ栏中的答语匹配Ⅰ1.Canweeatintheclassroom?2.Canstudentstalkinthehallways?3.Dowehavetowearauniform?4.Whatisthefirstrule?5.DoIhavetowearahat?ⅡA.Don’tfight.B.No,youdon’thaveto.It’snotcoldtoday.C.Yes,wedo.D.No,wecan’t.E.Yes,theycan.答案:1～5.DECAB
