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1、歡迎來到英語課堂歡迎來到英語課堂Unit 4Dont eat in class.Section A(Grammar Focus-3c).選句子配圖選句子配圖 Dont talk.Dont listen to music.Dont eat.Dont take photos.答案答案:1.Dont eat.2.Dont talk.3.Dont take photos.4.Dont listen to music.句型展示句型展示1.她必須在圖書室里保持安靜嗎她必須在圖書室里保持安靜嗎?是的。是的。she quiet in the library?Yes,she.答案答案:Does;have to

2、be;does2.我們能在走廊里聽音樂嗎我們能在走廊里聽音樂嗎?不不,不能。不能。we music in the hallways?No,you.3.我們不必天天來上學(xué)。我們不必天天來上學(xué)。We come to school every day.答案答案:2.Can;listen to;cant 3.dont have toDoes he have to wear a uniform at school?在學(xué)校里他必須穿著校服嗎在學(xué)校里他必須穿著校服嗎?【自主領(lǐng)悟自主領(lǐng)悟】(1)have to為情態(tài)動詞為情態(tài)動詞,意為意為“必須必須,不得不不得不”,后后接動詞原形接動詞原形,有人稱、時態(tài)和數(shù)的

3、變化。其第三人稱單數(shù)形式有人稱、時態(tài)和數(shù)的變化。其第三人稱單數(shù)形式為為has to,過去式為過去式為had to。例如。例如:Its too late.I have to go home.太晚了。我必須回家了。太晚了。我必須回家了。(2)have to的否定形式和疑問形式要借助于的否定形式和疑問形式要借助于do/does/did等助動等助動詞來表示。例如詞來表示。例如:You dont have to clean the room now.你現(xiàn)在沒必要打掃房間。你現(xiàn)在沒必要打掃房間。【用法辨析用法辨析】have to與與must的區(qū)別的區(qū)別have to強調(diào)客觀上要求強調(diào)客觀上要求“不得不不得

4、不”must強調(diào)個人主觀感覺強調(diào)個人主觀感覺“必須必須;有必要有必要”。沒有人。沒有人稱、時態(tài)和數(shù)的變化。稱、時態(tài)和數(shù)的變化。mustnt意為意為“禁止禁止”【圖解助記圖解助記】【活學(xué)活用活學(xué)活用】他今天得去看望他爺爺。他今天得去看望他爺爺。He visit his grandfather today.今天你不必穿校服。今天你不必穿校服。You wear your school uniform today.你必須買票進電影院。你必須買票進電影院。You a ticket to go into the cinema.答案答案:has todont have tomust buy.單項選擇單項選擇

5、1.Can we wear hats in class?.A.Yes,we doB.No,we dontC.Yes,we can D.Yes,we cant2.Can I use your ruler?Yes,you.A.mayB.needC.canD.must3.do you have to do after school?Do my homework,of course.A.WhatB.WhenC.WhereD.How4.late for school again.Sorry,I wont.A.Not beB.Dont beC.Not D.Dont5.Which of the follow

6、ing pictures means“Please be quiet”?.句型轉(zhuǎn)換句型轉(zhuǎn)換1.We have to stay at home.(改為一般疑問句改為一般疑問句)youto stay at home?2.Bob has to get home before nine oclock.(改為否定句改為否定句)Bob get home before nine oclock.3.We can wear our own clothes.(改為一般疑問句改為一般疑問句,并作否定回答并作否定回答)youyour own clothes?No,we.答案答案:1.Do;have2.doesnt h

7、ave to3.Can;wear;cant.將將欄中的問句和欄中的問句和欄中的答語匹配欄中的答語匹配1.Can we eat in the classroom?2.Can students talk in the hallways?3.Do we have to wear a uniform?4.What is the first rule?5.Do I have to wear a hat?A.Dont fight.B.No,you dont have to.Its not cold today.C.Yes,we do.D.No,we cant.E.Yes,they can.答案答案:15.DECAB安全小貼上課間活動注意安全