Unit4 Don’t eat in class.Section A(Grammar Focus—3c)Can we do these things at school?School rules listen to music in classlisten to music after class.Don’t listen to music in class.√run in the hallwaysrun on the playground.School rulesDon’t run in the hallways.arrive late for classmust be on timeeat in the classroomeat in the dining hall.fight at schoolmust be friendlySchool Rules1. Don’t arrive late for class.2. Don’t run in the hallways.3. Don’t eat in the classroom.4. Don’t listen to music in class.5. Don’t fight.1、祈使句的含义：祈使句是表示命令、______ 、 _____、_____ 、 等的句子。2、祈使句否定形式的结构：________________。3、祈使句的语调：_____。请求劝告叮嘱Don't+动词原形降调祈使句Library Rules1.2.3.4.Don’t talk. Don’t eat. Don’t listen to music. Don’t take photos. Don’t talk in the library.We _____be quiet in the library.mustWe _______ be quiet in the library.have toDon’t eat in the libraryWe _____ keep the environment(环境)clean.mustWe _______ keep the environment(环境) clean.have tohave to表示“必须”时和must意义很接近。1. I must be quiet in the library. 2. There are many students reading in our classroom, I have to be quiet . 思考：这两个句子中的must和ha |
