七年級英語下冊-Unit-4-Section-A(Grammar-Focus-3c)ppt課件-人教新目標

Unit 4 Don’t eat in class. Section A(Grammar Focus-3c) Ⅰ. 選句子配圖選句子配圖 Don’t talk. Don’t listen to music. Don’t eat. Don’t take photos. 答案答案 : 1. Don’t eat. 2. Don’t talk. 3. Don’t take photos. 4. Don’t listen to music. Ⅱ. 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 : Does; have to be; does 2. —— 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。我們不必天天來上學。 We come to school every day. 答案 : 2. Can; listen to; can’t 3. don’t have to Does he have to wear a uni at school? 在學校里他必須穿著校服嗎在學校里他必須穿著校服嗎 ? 【【自主領悟自主領悟】】 (1)have to 為情態動詞為情態動詞 , 意為“必須意為“必須 , 不得不得不”不” , 后接動詞原形后接動詞原形 , 有人稱、時態和數的變化。其第三人有人稱、時態和數的變化。其第三人稱單數形式為稱單數形式為 has to, 過去式為過去式為 had to 。例如。例如 : It’s 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 等助等助動詞來表示。例如動詞來表示。例如 : You don’t have to clean the room now. 你現在沒必要打掃房間。你現在沒必要打掃房間。【【用法辨析用法辨析】】 have to 與與 must 的區別的區別 have to強調客觀上要求“不得不”強調客觀上要求“不得不” must 強調個人主觀感覺“必須強調個人主觀感覺“必須 ; 有必要”。沒有人有必要”。沒有人稱、時態和數的變化。稱、時態和數的變化。 mustn’t 意為“禁止”意為“禁止” 【【圖解助記圖解助記】】【【活學活用活學活用】】 ①① 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. ②② 今天你不必穿校服。今天你不必穿校服。 You wear your school uni today. ③③ 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 to① ② ② don’t have to ③ ③ must buy Ⅰ. 單項選擇單項選擇 1. —Can we wear hats in class? —— . A. Yes, we do B. No, we don’t C. Yes, we can D. Yes, we can’t 2. —Can I use your ruler? —Yes, you . A. may B. need C. can D. must 3. — do you have to do after school? —Do my homework, of course. A. WhatB. WhenC. WhereD. How 4. — late for school again. —Sorry, I won’t. A. Not beB. Don’t beC. Not D. Don’t 5. Which of the following pictures means“Please be quiet”? ⅡⅡ. 句型轉換句型轉換 1. We have to stay at home. ( 改為一般疑問句改為一般疑問句 ) you to stay at home? 2. Bob has to get home before nine o’clock. ( 改為否定句改為否定句 ) Bob get home before nine o’clock. 3. We can wear our own clothes. ( 改為一般疑問句改為一般疑問句 , 并作否定回并作否定回答答 ) —— you your own clothes? —No, we . 答案 : 1. Do; have 2. doesn’t have to 3. Can; wear; can’t Ⅲ. 將將ⅠⅠ欄中的問句和欄中的問句和ⅡⅡ欄中的答語匹配欄中的答語匹配 ⅠⅠ 1. Can we eat in the classroom? 2. Can students talk in the hallways? 3. Do we have to wear a uni? 4. What is the first rule? 5. Do I have to wear a hat? ⅡⅡ A. Don’t fight. B. No, you don’t have to. It’s not cold today. C. Yes, we do. D. No, we can’t. E. Yes, they can. 答案 : 1 ～ 5. DECAB