Unit4 Don27t eat in classSection A Grammar Focus-3c课件

1、Unit4 Don27t eat in classSection A Grammar Focus-3c,Unit 4,Unit4 Don27t eat in classSection A Grammar Focus-3c,Unit 4 Dont eat in class.,Unit4 Don27t eat in classSection A Grammar Focus-3c,Section A Grammar Focus-3c,Unit4 Don27t eat in classSection A Grammar Focus-3c,Objectives,1. To learn Imperativ

2、es Dont: Dont run in the hallways. 2. To learn to use can for permission: Can we eat in the classroom? 3. To learn to use modal verbs have to & must: We have to be quiet in the library. We must be on time for class.,Unit4 Don27t eat in classSection A Grammar Focus-3c,1. 不要在楼道里跑。 _ 2. 不要打架。 _ 3. 有什么规

3、矩？ _ 4. 我们必须按时上课。 _,Dont fight.,Dont run in the hallways.,What are the rules?,We must be on time for class.,Grammar Focus,Unit4 Don27t eat in classSection A Grammar Focus-3c,5. 我们可以在教室里吃东西吗？ _ 6. 不能。但我们可以在餐厅里吃东西。 _ _ 7. 我们可以在上课的时候带帽子吗？ _,Can we wear a hat in class?,No, we cant, but we can eat in the

4、 dining hall.,Can we eat in the classroom?,Unit4 Don27t eat in classSection A Grammar Focus-3c,8. 他在学校里必须穿校服吗？ _ 9. 是的，必须。/ 不，不必。 _ 10. 你们必须做什么？ _ 11. 在图书馆里我们必须保持安静。 _,Yes, he does. / No, he doesnt.,Does he have to wear a uniform at school?,What do you have to do?,We have to be quiet in the library.

5、,Unit4 Don27t eat in classSection A Grammar Focus-3c,Observe and Learn,Dont eat in the classroom. Dont fight. Dont run in the hallways. Dont arrive late for class. Dont listen to music in class.,Have a think: 祈使句是怎样构成的？ 一般在什么情况下会用祈使句？,Dont 不要做,Unit4 Don27t eat in classSection A Grammar Focus-3c,祈使句一

6、般用来表示请求、命令、劝说、号召、警告等。 在祈使句中, 通常省略第二人称主语you。肯定式以动词原形开头，否定式一般在动词原形前加dont。,祈使句,Unit4 Don27t eat in classSection A Grammar Focus-3c,一、祈使句的肯定式 1. 以行为动词原形开头，简称Do型。 e.g. Come here. 到这儿来。 2. 以动词be开头，简称Be型。 e.g. Be quiet, please. 请安静。 3. 以Let开头，简称Let型。 e.g. Lets go! 咱们走吧!,Unit4 Don27t eat in classSection A G

7、rammar Focus-3c,注意： 有时可在祈使句的句首或句尾加上please，使语气显得客气、有礼貌。如果在句尾加please，应该用逗号与前句隔开。 e.g. Go this way, please. 请这边走。,Unit4 Don27t eat in classSection A Grammar Focus-3c,二、祈使句的否定式 1. Do型和Be型的否定式是在句首加dont。 e.g. Dont sit here. 不要坐在这儿。 Dont be late. 别迟到。 2. 以let开头的祈使句，其否定式有两种： 一种是直接在句首加dont，另一种是 “let +宾语+not

8、+动词原形+ (其他)”。 e.g. Dont let him go. 不要让他走。 Lets not go there. 咱们别去那儿。,Unit4 Don27t eat in classSection A Grammar Focus-3c,注意： “No+名词/动词ing形式”表示禁止或规劝，常用于公共场所。 e.g. No photos! 禁止拍照！ No smoking！ 禁止吸烟！,Unit4 Don27t eat in classSection A Grammar Focus-3c,【运用】将下列句子翻译成英语。 1. 请看这幅图画。 2. 不要在教室里跑。 3. 让我们帮助他。,

9、Please look at the picture. / Look at the picture, please.,Dont run in the classroom.,Lets help him.,Unit4 Don27t eat in classSection A Grammar Focus-3c,4. 在图书馆保持安静。 5. 上课不要迟到。,Be quiet in the library.,Dont be late for class.,Unit4 Don27t eat in classSection A Grammar Focus-3c,Observe and learn,Have

10、 a think: 1. 情态动词在用法上有什么共同点？ 2. can在本单元主要表示什么含义？它还可表达什么意思？ 3. have to在用法上与其他情态动词有何区别？,情态动词can, must, have to 后面都接动词原形,Unit4 Don27t eat in classSection A Grammar Focus-3c,本单元can意为“可以”，表示请求、允许。如:,Icandanceandsing.,2) can还可表示能力, “能，会”。如:,- Canthestudentsruninthehallways? - Yes, they can./No, they cant.

11、 We cant eat in the classroom.,情态动词can,Unit4 Don27t eat in classSection A Grammar Focus-3c,肯定句: 主语+can+动词原形+其他. 否定句： 主语+can not/cant+动词原形+其他. 疑问句: Can+主语+动词原形+其他? 肯定回答：Yes, 主语+can. 否定回答：No, 主语+cant.,情态动词can的句型结构:,Unit4 Don27t eat in classSection A Grammar Focus-3c,情态动词must表说话人的主观看法，表示必须、必要。无人称和数的变化

12、，不能单独使用，必须与其后的动词原形构成谓语。 句型结构：主语+must+动词原形+其他.,如: You must come in time. 你必须按时来。 The children must be back before 6 oclock. 孩子们必须6点前回来。,情态动词must,Unit4 Don27t eat in classSection A Grammar Focus-3c,have to 表示必须, 强调客观需要, 有不得不、被逼无奈做某事的意思。 此词既有人称、单复数的变化, 也有动词时态的变化。 其否定形式和疑问句形式均需要借助助动词do才可以进行变化。,情态动词 have

13、 to,Unit4 Don27t eat in classSection A Grammar Focus-3c,have to的句型结构: 肯定句： 主语have/has/hadtoV原形其他. 否定句： 主语+dont/doesnt/didnthavetoV原形其他. 疑问句: Do/Does/Did主语havetoV原形其他?,如: She has to look after her mother at home. We dont have to clean the room today. -Does he have to go to bed now? -Yes, he does./ /N

14、o, he doesnt .,Unit4 Don27t eat in classSection A Grammar Focus-3c,Library Rules Dont talk. _ _ _,Write the rules for the school library.,Dont listen to music.,Dont eat or drink.,Dont take photos.,3a,Unit4 Don27t eat in classSection A Grammar Focus-3c,Be quiet? (she/have to /in the library) Q: Does

15、she have to be quiet in the library? A: Yes, she does.,Use the words to make questions about the rules. Then write answers according to your school.,3b,Unit4 Don27t eat in classSection A Grammar Focus-3c,2. Eat? (he/have to/in the dining hall) Q: _? A: _ 3. Listen to music? (we/can/in the hallways)

16、Q: _? A: _ 4. Wear a hat? (we/can/in the classroom) Q: _? A: _,Yes, he does.,Does he have to eat in the dining hall,Can we listen to music in the hallways,No, we cant.,Can we wear a hat in the classroom,No, we cant.,Unit4 Don27t eat in classSection A Grammar Focus-3c,At my dream school, we dont have

17、 to come to school every day,We can eat in class,Make up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!,3c,Unit4 Don27t eat in classSection A Grammar Focus-3c,We dont have to wear school uniforms,We dont have to do homework every

18、day,Unit4 Don27t eat in classSection A Grammar Focus-3c,Discuss and make rules for the computer room in your school.,Computer Room Rules _ _ _ _ _,Unit4 Don27t eat in classSection A Grammar Focus-3c,We must be quiet in the computer room.,Dont run in the computer room.,Dont eat or drink in the comput

19、er room.,Wear slippers in the computer room.,Unit4 Don27t eat in classSection A Grammar Focus-3c,Computer Room Rules _ _ _ _ _,We must be quiet in the computer room.,Dont eat or drink in the computer room.,Dont run in the computer room.,Wear slippers in the computer room.,Clean the computer room eve

20、ry day.,Unit4 Don27t eat in classSection A Grammar Focus-3c,Dont run in the hallways. We must be on time for class. - Can we eat in the classroom? No, we cant, but we can eat in the dining hall. - Does he have to wear a uniform at school? Yes, he does./ No, he doesnt. - What do you have to do? We ha

21、ve to be quiet in the library.,课时重点回顾,Unit4 Don27t eat in classSection A Grammar Focus-3c,I. 根据句意及括号内所给单词的提示填空。 1. Dont _(be) late next time, Jim. 2. I have to _(finish) the work before 5:00 p.m. 3. Can we _(play) games with those girls? 4. They must _(think) about it. 5. Helen, _(do) the dishes now.,do,be,finish,play,think,Unit4 Don27t eat in classSection A Grammar Focus-3c,II. 根据括号内的要