1、,Unit 4 Dont eat in class.,定邊三中 吳競,Dont eat in class,Unit 4,Section A Grammar Focus-3c,1. Is John new at school? _ 2. Are there many rules at school? _,Recite 2d on page 20 and answer the questions.,Yes, he is.,Revision,Yes, there are.,3. Can he bring music players to school? _ 4. Do they have to al

2、ways wear the school uniform? _ 5. Whats the library rule? _,No, he cant.,Yes, they do.,We have to be quiet.,Objectives,To learn Imperatives Dont Dont run in the hallways. To learn to use can for permission: Can we eat in the classroom? To learn to use modal verbs have to & must We have to be quiet

3、in the library. We must be on time for class.,Dont _!,Look and say,Dont _.,fight,Dont _.,run in the hallways,eat in the classroom,Lets play a game! Who knows these signs?,Dont _ class.,arrive late for,Dont _ _!,listen to music,in class,Observe and learn,Dont eat in the classroom. Dont fight. Dont ru

4、n 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？一般在什么情況下會用祈使句？,Dont 不要做,祈使句一般用于上級對下級，長輩對晚輩之間，表示命令、勸說或警告，也可表示請求。,祈使句,*主語一般為第二人稱，但通常省略。 *肯定式一般以動詞原形開頭， 否定式通常在動詞原形前加dont。 *為使祈使句更委婉、有禮貌，可在祈使句開頭或末尾加please。 *句末一般用句號，表示強烈語氣時用感嘆號。,1. 肯定祈使句的常見句型結(jié)構(gòu)： Do型：動詞原

5、形+賓語+其他. Open the door, please. Be型：Be+表語. 如：Be a good boy! Let型：Let+賓語+動詞原形+其他. Lets+動詞原形+其他. Let me help you. Lets play tennis.,祈使句的句型結(jié)構(gòu),2. 否定祈使句的常見句型結(jié)構(gòu)： Do型和Be型的否定式： Dont+動詞原形 / be+其他. Dont forget me. Dont be late. Let型的否定式： Dont+let+賓語+動詞原形+其他. Lets+not+動詞原形+其他. Dont let him go back. Lets not go

6、 swimming. 警示語：No+名詞 / 動詞-ing形式. No talking.,將下面的句子改為祈使句，每空一詞。 1. You can come in. _ _, please. 2. I can help you. _ me _ you. 3. You cant eat in class. _ _ in class. 4. You cant be late for school. _ _ late for school. 5. You cant talk in the library. _ talking in the library.,Come in,Let help,Dont

7、 eat,Dont be,No,Practice,2.can在本單元主要表示什么含義？它還可以表達什么意思？,1.圈出情態(tài)動詞，情態(tài)動詞在用法上有什么共同點？,3.have to在句法上與其他的情態(tài)動詞的區(qū)別?,本單元can意為“可以”，表示請求、允許,Icandanceandsing.,情態(tài)動詞 can,2) can還可表示能力，“能，會”,-Canthestudentsruninthehallways? -Yes, they can./No, they cant. We cant eat in the classroom.,肯定: 主語+can+動詞原形+其他. 否定： 主語+can no

8、t/cant+動詞原形+其他. 疑問句: Can+主語+動詞原形+其他? 肯定回答：Yes, 主語+can. 否定回答：No, 主語+cant.,情態(tài)動詞can的句型結(jié)構(gòu):,情態(tài)動詞must表說話人的主觀看法，表示必須、必要。無人稱和數(shù)的變化 ，不能單獨使用，必須與其后的動詞原形構(gòu)成謂語。 句型結(jié)構(gòu)：主語+must+動詞原形+其他.,情態(tài)動詞must,You must come in time. 你必須按時來。 Meat must becookedthoroughly. 肉必須徹底煮熟。,情態(tài)動詞have to,have to 表示必須，強調(diào)客觀需要，有不得不、被逼無奈做某事的意思。 此詞既有

9、人稱、單復數(shù)的變化、也有動詞時態(tài)的變化。 其否定形式和疑問句形式均需要借助助動詞do才可以進行變化。,They _wear the uniform every day.,-Yes, _.,Look and say,-Do you _ the uniform every day?,have to,-No, _.,we do,we dont,have to wear,She _do homework every day.,has to,I _ my bedroom on weekends.,have to clean,1. 我們可以在教室里吃東西嗎？ _ 2. 不能。但我們可以在餐廳里吃東西。 _

10、 _ 3. 我們可以在上課的時候帶帽子嗎？ _ 4. 我們必須按時上課. _,Can we wear a hat in class?,No, we cant, but we can eat in the dining hall.,Can we eat in the classroom?,We must be on time for class.,閱讀Grammar Focus部分，完成下列句子。,5. 他在學校里必須穿校服嗎？ _ 6. 是的，必須。/ 不，不必。 _ 7. 你們必須做什么？ _ 8. 在圖書館里我們必須保持安靜。 _,Yes, he does. / No, he doesnt

11、.,Does he have to wear a uniform at school?,What do you have to do?,We have to be quiet in the library.,Library Rules Dont talk. _ _ _ _,3a Write the rules for the school library.,Dont listen to music.,Dont eat or drink.,Dont take photos.,Dont smoke.,Be quiet? (she/have to /in the library) Q: Does s

12、he have to be quiet in the library? A: Yes, she does.,3b Use the words to make questions about the rules. Then write answers according to your school.,Writing,2. Eat? (he/have to/in the dining hall) Q: _? A: _ 3. Listen to music? (we/can/in the hallways) Q: _? A: _ 4. Wear a hat? (we/can/in the clas

13、sroom) Q: _? A: _,Then answer the questions.,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.,At my dream school, we dont have to come to school every day. ,We can eat in class. ,3c Make up five c

14、ool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!,At my dream school, we dont have to come to school every day. We can eat in the classroom. We can listen to music in class. We dont have to do homework. We dont have to wear school uniforms

15、 at school.,Report,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 have to be quiet in the library.,課時重點回顧,Review,

16、用所給單詞的適當形式填空。 1. Dont _(listen) to music in the library. 2. Do we have to _ (clean) the room every day? 3. You cant _(wear) sunglasses in the classroom. 4. Please _ (arrive) at school on time (準時).,listen,clean,wear,arrive,Homework,3. You cant wear a hat in class. (改為祈使句) _ _ a hat in class. 4. He has to see his grandparents on weekends. (對劃線部分提問) What _ he _ _ _ on weekends? 5. Come in, please. (改為否定句) _ _ in, please.,Dont wear,does,have to do,Dont come,1. 我們必須按時到校。 We must _ _ school _ _. 2.