Unit4 Dont eat in class.,Section A（Grammar Focus-3c）,Warm-up,1,Presentation,2,Language Points,3,Exercise,4,Do you know the rules in these places?,Warm-up,Look and say,hospital,meeting room,gas station,Look at the two girls. What are the differences between the two expressions?,Presentation,Im tired. I want to have a sit. Can I sit here? Yes, you can.,I dont like school, but the rules let all of us go to school. So I have to go to school.,Write the rules for the school library.,Library Rules 1. _ 2. _ 3. _ 4. _,Dont talk.,Dont eat in the library.,Dont listen to music in the library.,Dont take pictures/photos in the library.,Use the words to make questions about the rules. Then write answers according to your school.,Be quiet? Q: _ (she/have to/ in the library)? A: _ Eat? Q: _ (he/have to/in the dining hall)? A: _,Does she have to be quiet in the library?,Yes, she does.,Does he have to eat in the dining hall?,Yes, he does.,Listen to music? Q: _ (we/can/ in the hallways)? A: _ Wear a hat? Q: _ (we/can/in the classroom)? A: _,Can we wear a hat in the classroom?,No, we cant.,Can we listen to music in the hallways?,No, we cant.,Make up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!,We can walk out of the class anytime we want. We can wear what we want. We may have less homework and more free time. ,祈使句是表示请求、命令、叮嘱、号召、劝告 等的句子; 通常省略主语you; 句中谓语动词用动词 原形; 句尾一般用降调; 祈使句的开头是动词原形。 祈使句有肯定和否定两种： e.g. Look out! 小心！Wait here for me! 在这等我！,Grammar,Language points,Come in, please! 请进！ Sit down, please. 请坐。 Lets go home. 我们回家吧。 否定的祈使句是在动词前(即句首)加Dont. e.g. Dont talk in class! 不要在课常上讲话！ Dont open the window! 别开窗！ Dont be late for school. 上学别迟到 !Dont smoking! 别吸烟!,2. 情态动词have to 的用法,have to意思是“必须、不得不”, 它侧重于客观 上的必要和外界的权威。 1) 结构: 主语have to动词原形其他. (一般现在时, 主语是第三人称单数时, 用has to; 句子是过去时, 用had to。) 如：,We have to wear sneakers for gym classes. 在体育课上, 我们必须穿运动鞋。 Tom has to practice the guitar every day. 汤姆每天必须练习弹吉它。 I had to get up at 5:00 am last Monday. 上周一, 我不得不早上5点起床。,2) 否定形式: 主语dont have to动词原形 其他.(一般现在时, 主语是第三人称单数时, 用doesnt have to; 句子是过去时, 用didnt have to。) e.g. Nick doesnt have to wear a uniform.尼克不必穿制服。We didnt have to do our homework at once. 我们不必马上完成作业。,3) 疑问句: Do (Does 或 Did)主语have to 动词原形其他? 如: Do you have to stay at home on weekends? Yes, I do. / No, I dont. 周末你必须待在家里吗？是的, 我必须。/ 不, 我不必。Did he have to go to bed by 11:00 last night? 昨晚, 他不得不11点前上床睡觉吗？,1) 表示能力, “会”, “能”。例如: Can you play the guitar? 你会弹吉他吗？ Judy can speak a little Chinese. 朱蒂会说一点中文。 I can dance and sing. 我能唱歌又能跳舞。,3. 情态动词can的用法,2) 表示允许、许可, “可以”、“能” 。例如: Can the students run in the hallways? 学生们可以在走廊上跑吗? We can eat outside. 我们可以在外面吃东西。 Can I come in? 我能进来吗?,根据句意，用can和cant填空。 1. Mr. Green_ smoke here because theres a sign on the wall. It says “No smoking.” 2. Its very hot outside. You_ wear a hat. 3. We _ eat in the classroom because its impolite to teachers. 4. I _ go to bed after 11:00 on school nights. 5. The students _ read books and magazines in the library.,cant,can,cant,can,cant,Exercise,用have to或has to填空。 1.We _ clean our classroom after school. 2.She _ make her bed after getting up. 3.Its late. Mr Beckman _ go to work by car. 4.Emily and Peter join a music club. They _ practice the guitar every day.,have to,have to,has to,has to,Homework:,Talk about your school day. What can you do and what do you have to do? Then make a list.,