Unit4 Don27t eat in classSection A Grammar Focus-3c（課堂PPT）

1、12Unit 4Dont eat in class. 41. To learn Imperatives 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.1. 不要在樓道里跑。不要在樓道里跑。 _2. 不要打架。不要打架。 _3.

2、 有什么規(guī)矩？有什么規(guī)矩？ _ 4. 我們必須按時(shí)上課。我們必須按時(shí)上課。 _Dont fight. Dont run in the hallways.What are the rules?We must be on time for class. 65. 我們可以在教室里吃東西嗎？我們可以在教室里吃東西嗎？ _6. 不能。但我們可以在餐廳里吃東西。不能。但我們可以在餐廳里吃東西。 _ _7. 我們可以在上課的時(shí)候帶帽子嗎？我們可以在上課的時(shí)候帶帽子嗎？ _Can we wear a hat in class? No, we cant, but we can eat in the dining

3、 hall. Can we eat in the classroom?8. 他在學(xué)校里必須穿校服嗎？他在學(xué)校里必須穿校服嗎？ _9. 是的，必須。是的，必須。/ 不，不必。不，不必。 _10. 你們必須做什么？你們必須做什么？ _ 11. 在圖書館里我們必須保持安靜。在圖書館里我們必須保持安靜。 _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. 8Observe and LearnD

4、ont 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:祈使句是怎樣構(gòu)成的？祈使句是怎樣構(gòu)成的？一般在什么情況下會(huì)一般在什么情況下會(huì)用祈使句？用祈使句？Dont 不要做不要做祈使祈使句一般用來表示請(qǐng)求、命令、勸說、句一般用來表示請(qǐng)求、命令、勸說、號(hào)召、警告等。號(hào)召、警告等。在祈使句中在祈使句中, 通常省略第二人稱主語通常省略第二人稱主語you?？隙ㄊ揭詣?dòng)詞原形開頭，否定式一般在動(dòng)肯定式以動(dòng)詞

5、原形開頭，否定式一般在動(dòng)詞原形前加詞原形前加dont。10一、祈使句的肯定式一、祈使句的肯定式1. 以行為動(dòng)詞原形開頭，簡(jiǎn)稱以行為動(dòng)詞原形開頭，簡(jiǎn)稱Do型型。 e.g. Come here. 到這兒來。到這兒來。2. 以動(dòng)詞以動(dòng)詞be開頭，簡(jiǎn)稱開頭，簡(jiǎn)稱Be型型。 e.g. Be quiet, please. 請(qǐng)安靜。請(qǐng)安靜。3. 以以Let開頭，簡(jiǎn)稱開頭，簡(jiǎn)稱Let型型。 e.g. Lets go! 咱們走吧咱們走吧! 注意：注意：有時(shí)可在祈使句的句首或句尾加上有時(shí)可在祈使句的句首或句尾加上please，使語氣顯得客氣、有禮貌。如，使語氣顯得客氣、有禮貌。如果在句尾加果在句尾加please，

6、應(yīng)該用逗號(hào)與前句，應(yīng)該用逗號(hào)與前句隔開。隔開。e.g. Go this way, please. 請(qǐng)這邊走。請(qǐng)這邊走。12二、祈使句的否定式二、祈使句的否定式1. Do型和型和Be型的否定式是在句首加型的否定式是在句首加dont。 e.g. Dont sit here. 不要坐在這兒。不要坐在這兒。 Dont be late. 別遲到。別遲到。2. 以以let開頭的祈使句，其否定式有兩種：開頭的祈使句，其否定式有兩種： 一種是直接在句首加一種是直接在句首加dont，另一種是，另一種是 “l(fā)et +賓語賓語+not +動(dòng)詞原形動(dòng)詞原形+ (其他其他)”。 e.g. Dont let him go

7、. 不要讓他走。不要讓他走。 Lets not go there. 咱們別去那兒。咱們別去那兒。注意：注意：“No+名詞名詞/動(dòng)詞動(dòng)詞 ing形式形式”表示禁止或表示禁止或規(guī)勸，常用于公共場(chǎng)所。規(guī)勸，常用于公共場(chǎng)所。e.g. No photos! 禁止拍照！禁止拍照！ No smoking！ 禁止吸煙！禁止吸煙！【運(yùn)用運(yùn)用】將下列句子翻譯成英語。將下列句子翻譯成英語。1. 請(qǐng)看這幅圖畫。請(qǐng)看這幅圖畫。2. 不要在教室里跑。不要在教室里跑。3. 讓我們幫助他。讓我們幫助他。Please look at the picture. / Look at the picture, please.Dont

8、 run in the classroom.Lets help him.4. 在圖書館保持安靜。在圖書館保持安靜。5. 上課不要遲到。上課不要遲到。Be quiet in the library.Dont be late for class.16Observe and learnHave a think:1. 情態(tài)動(dòng)詞在用法上有什么共同點(diǎn)？情態(tài)動(dòng)詞在用法上有什么共同點(diǎn)？2. can在本單元主要表示什么含義？它在本單元主要表示什么含義？它還可表達(dá)什么意思？還可表達(dá)什么意思？3. have to在用法上與其他情態(tài)動(dòng)詞有在用法上與其他情態(tài)動(dòng)詞有何區(qū)別？何區(qū)別？情態(tài)動(dòng)詞情態(tài)動(dòng)詞can, must, h

9、ave to 后面都接動(dòng)詞原形后面都接動(dòng)詞原形17 本單元本單元can意為意為“可以可以”，表示請(qǐng)求、，表示請(qǐng)求、允許。允許。如如:I can dance and sing.2) can還可表示能力還可表示能力, “能，會(huì)能，會(huì)”。如如:- Can the students run in the hallways? - Yes, they can./No, they cant.We cant eat in the classroom. 18肯定句肯定句: 主語主語+can+動(dòng)詞原形動(dòng)詞原形+其他其他.否定句：否定句：主語主語+can not/cant+動(dòng)詞原形動(dòng)詞原形+其他其他.疑問句疑問句:

10、 Can+主語主語+動(dòng)詞原形動(dòng)詞原形+其他其他?肯定回答：肯定回答：Yes, 主語主語+can.否定回答：否定回答：No, 主語主語+cant.情態(tài)動(dòng)詞情態(tài)動(dòng)詞can的句型結(jié)構(gòu)的句型結(jié)構(gòu):19情態(tài)動(dòng)詞情態(tài)動(dòng)詞must表說話人的主觀看法，表示表說話人的主觀看法，表示必須、必要。無人稱和數(shù)的變化必須、必要。無人稱和數(shù)的變化 ，不能單，不能單獨(dú)使用，必須與其后的動(dòng)詞原形構(gòu)成謂語。獨(dú)使用，必須與其后的動(dòng)詞原形構(gòu)成謂語。句型結(jié)構(gòu)：句型結(jié)構(gòu)：主語主語+must+動(dòng)詞原形動(dòng)詞原形+其他其他.如如: You must come in time. 你必須按時(shí)來。你必須按時(shí)來。 The children must

11、 be back before 6 oclock. 孩子們必須孩子們必須6點(diǎn)前回來。點(diǎn)前回來。20have to 表示必須表示必須, 強(qiáng)調(diào)客觀需要強(qiáng)調(diào)客觀需要, 有不得有不得不、被逼無奈做某事的意思。不、被逼無奈做某事的意思。 此詞既有人稱、單復(fù)數(shù)的變化此詞既有人稱、單復(fù)數(shù)的變化, 也有動(dòng)詞也有動(dòng)詞時(shí)態(tài)的變化。時(shí)態(tài)的變化。其否定形式和疑問句形式均需要借助助其否定形式和疑問句形式均需要借助助動(dòng)詞動(dòng)詞do才可以進(jìn)行變化。才可以進(jìn)行變化。21have to的句型結(jié)構(gòu)的句型結(jié)構(gòu):肯定句：肯定句：主語主語have/has/had toV原形其他原形其他. 否定句：否定句：主語主語+dont/doesnt

12、/didnt have toV原形其原形其他他.疑問句疑問句: Do/Does/Did主語主語have toV原形其他原形其他?如如: 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./ /No, he doesnt . Library Rules Dont talk. _ _1. _Write the rules for the school library.Dont listen to m

13、usic.Dont eat or drink. Dont take photos. 3a Be quiet? (she/have to /in the library) Q: Does 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.3b2. Eat? (he/have to/in the dining hall) Q: _? A: _3. Liste

14、n to music? (we/can/in the hallways) Q: _? A: _ 4. Wear a hat? (we/can/in the classroom) Q: _? A: _Yes, he does.Does he have to eat in the dining hallCan we listen to music in the hallwaysNo, we cant.Can we wear a hat in the classroomNo, we cant.At my dream school, we dont have to come to school eve

15、ry dayWe can eat in classMake up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!3cWe dont have to wear school uniformsWe dont have to do homework every dayDiscuss and make rules for the computer room in your school.Computer Room Ru

16、les _ _ _ _1. _We must be quiet in the computer room.Dont run in the computer room.Dont eat or drink in the computer room. Wear slippers in the computer room.Computer Room Rules _ _ _ _1. _We must be quiet in the computer room.Dont eat or drink in the computer room.Dont run in the computer room.Wear

17、 slippers in the computer room. Clean the computer room every day. 30Dont 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

18、?- We have to be quiet in the library.課時(shí)重點(diǎn)回顧課時(shí)重點(diǎn)回顧I. 根據(jù)句意及括號(hào)內(nèi)所給單詞的提示填空。根據(jù)句意及括號(hào)內(nèi)所給單詞的提示填空。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 befinish play think 32II. 根據(jù)括號(hào)內(nèi)的要求完成下列各題，每空根據(jù)括號(hào)內(nèi)的要求完成下列各題，每空一詞一詞(含縮略形式含縮略形式)。1. Can they join th