初中英語(yǔ)人教版七年級(jí)下冊(cè)Unit 4 Dont eat in class.ppt

1、To learn imperatives (Dont .). To learn to use can for permission. To learn to use model verbs have to, must.,Objectives,Part I Words & Expressions Part II Grammar Focus Part III Exercises,Part I Words & Expressions,Lets learn some new words.,hallway,hall,dining hall,fight,uniform,dish,dishes,do the

2、 dishes,make ones bed,kitchen,hair,Part II Grammar Focus,Key Structures,1. Dont run in the hallways. 2. Dont fight. 3. What are the rules? We must be on time for class.,4. Can we eat in the classroom? No, we cant, but we can eat in the dining hall. 5. Can we wear a hat in class? Yes, we can. / No, w

3、e cant.,6. Does he have to wear a uniform at school? Yes, he does. / No, he doesnt. 7. What do you have to do? We have to be quiet in the library.,Key Points,一、祈使句 功能：命令、警告、要求。 結(jié)構(gòu)：省略了主語(yǔ)You的句子。 1. 動(dòng)詞原形（+賓語(yǔ)）！/ Be動(dòng)詞+ 形容詞/名詞！ (1) Close the door, please!,(2) Be careful ! Here comes the car. 2. Dont +動(dòng)詞原形

4、（+賓語(yǔ)）！/Dont be 動(dòng)詞+形容詞/名詞! (1) Dont eat in the classroom! (2) Dont be late for class! 3. No + 名詞 / doing！ (1) No smoking!,(2) No talking. 4. 含有祈使句的復(fù)合句：祈使句 + and + 句子。祈使句 + or + 句子。 (1) Work hard and youll succeed. =If you work hard, you will succeed. (2) Work hard or youll fail. =If you dont work har

5、d, you will fail.,二、情態(tài)動(dòng)詞 can的用法（can 在肯定句、疑問(wèn)句、 否定句的用法） 1. 肯定句：Sb. can do sth. We can eat in the dinning hall. 2. 疑問(wèn)句：Can sb. do sth.? Can we listen to music?,3. 否定句：Sb. cant (can not) do sth. We cant listen to music in the hallways.,have to 的用法 1. 肯定句：主語(yǔ)+have to+動(dòng)詞原形+ 其他 注意：一般現(xiàn)在時(shí)：主語(yǔ)是第三人稱單數(shù)時(shí)用has to，其它

6、時(shí)候用have to （過(guò)去時(shí)：無(wú)論人稱和單復(fù)數(shù)都用had to.）,(1) We have to wear sneakers for gym class. 在體育課上我們必須穿運(yùn) 動(dòng)鞋。 (2) Tom has to practice the guitar every day. 湯姆每天必須練習(xí)彈吉它。 (3) I had to get up at 5:00 am last Monday. 上周一我不得不早上5點(diǎn)起床。,2. 否定句:主語(yǔ)+dont have to+動(dòng)詞原形+其他。 一般現(xiàn)在時(shí):主語(yǔ)是第三 人稱單數(shù)時(shí)用doesnt have to, 其它時(shí)候用dont have to。 (過(guò)

7、去時(shí): 無(wú)論人稱和單復(fù)數(shù) 都用didnt have to),(1) Nick doesnt have to wear a uniform. 尼克不必穿制服。 (2) We didnt have to do our homework at once. 我們不必馬上完成作業(yè)。,3. 疑問(wèn)句：Do/Does/Did+主語(yǔ) +have to +動(dòng)詞原形+其他 (1) Do you have to stay at home on weekends? Yes, I do. / No, I dont. (2) Did he have to go to bed by 11:00 last night?,情態(tài)動(dòng)

8、詞must的用法： must表示說(shuō)話人的主觀看法， 及主觀上的必要性，還用于命令或愿望。只用于現(xiàn)在時(shí)，無(wú)人稱和單數(shù)的變化。在表示過(guò)去、將來(lái)和完成時(shí)，用have to的相應(yīng)形式來(lái)代替must。,1. 在表示有做某一個(gè)動(dòng)作的必要和義務(wù)時(shí)， 它的意思是“必須，應(yīng)該”。 You must finish your homework first. 你必須先完成作業(yè)。 2. 表示有很大把握的判斷或者推測(cè)，意思 是“一定，準(zhǔn)是”。 The tall man must be your father. 那個(gè)高個(gè)子男人一定是你的爸爸。,3. 以must開(kāi)頭的一般疑問(wèn)句，它 的否定回答用neednt（不必 要），不用

9、mustnt（不允許）， mustnt常用于否定句中表示 “不允許，禁止”。,(1) Must I go there on foot? 我必須得走過(guò)去嗎？ No, you neednt. 不，你不需要。 (2) You mustnt park your car here. 你的車不允許停在這兒。,Part III Exercises,趁熱打鐵,一、單項(xiàng)選擇 1. Can we wear hats in class? _. A. Yes, we doB. No, we dont C. No, we can D. No, we cant,D,2. Can I use your ruler? Yes

10、, you _. A. mayB. need C. can D. must 3. _do you have to do after school? Do my homework, of course. A. WhatB. WhenC. WhereD. How,C,A,4. _ late for school again. Sorry, I wont. A. Not be B. Dont be C. Not D. Dont 5. _ your homework after school. A.Doing B. To do C. Do D. Be do,B,C,1. 上課遲到 _ late _ l

11、ass 2. 清洗餐具 _ the _ 3. 幫媽媽做早飯 _ mom _ breakfast 4. 整理床鋪 _ ones bed 5. 對(duì)某人要求嚴(yán)格 be _ _ sb.,arrive/be,for,do,dishes,二、短語(yǔ)互譯,help,make,make,strict,with,1. (Can/Does)_ we eat in class? 2. (Dont/Has to)_ wear a hat to school! 3. Does Bill (have to/can)_ go to bed now? 4. (Do/Have to)_ they wear sneakers?,三、選擇正確的動(dòng)詞填空。,Can,Dont,have to,Do,1. We have to stay at home. (改為一般疑問(wèn)句) _ you _ to stay at home? 2. Bob has to get home before nine oclock. (改為否定句) Bob _ _ _ get home before nine oclock.,四、句型轉(zhuǎn)換,Do,have,doesnt,have,to,3. We can wear our own clothes. (改為一般疑問(wèn)句, 并作否定回答) _ you _ your