Unit 4 Dont eat in class.不要在课堂上吃东西不要在课堂上吃东西祈使句祈使句:是用来表示请求、命令、劝告等，通常省略主语 you.句中谓语动词用动词动词原形原形肯定句肯定句: Come in, please! 请进！ Sit down, please. 请坐。 否定否定的祈使句:是在动词前（即句首）加 dont. Dont talk in class! 不要在课堂上讲话Dont be late for school. 上学别迟到1. Dont arrive late for class. You must be on time.2. Dont run in the hallways.3. Dont eat in the classroom. You must eat in the dining hall.4. Dont listen to music in class.5. Dont fight. School rulesWhat are they doing? Are they right?What school rules are these students breaking?They are breaking the school rules.543121a1b: ListeningWhat rule is Peter/ Amy / Mike breaking ? NamePeterAmyMikerule2341c: Pair workA: What are the rules?1. Dont arrive late for class. You must be on time.2. Dont run in the hallways.3. Dont eat in the classroom. You must eat in the dining hall.4. Dont listen to music in class.5. Dont fight.B: We cant arrive late for class.We must be on time.Dont arrive late for class .You must be on time.School rules :beCan we arrive late for class?NO, we cant.Can we run in the hallways?Dont run in the hallways.No, we cant.Dont listen to music in class .School rules :Can we listen to music in class?No, we cant.Can we fight in class?Dont fight.No, we cant.A: Can we eat in the classroom?B: No, we cant. But we can eat in the dining room.A : Can we play basketball in the classroom ?B : No , we cant .We cant play basketball in the classroom , but we can play basketball on the playground .Summary1. Dont arrive late for class. You must be on time.2. Dont run in the hallways.3. Dont eat in the classroom. You must eat in the dining hall.4. Dont listen to music in class.5. Dont fight.HomeworkCopy the new words.Finish the exercises on your exercise books.Recite the five school rules.GoodbyeThanks