Unit 12 Dont eat in class. Tina JinWhat do these signs mean? rulesDo you know this school rules?Dont talk.Dont talk.Dont listen to the music Dont listen to the music Dont eat . Are they good students?What rules are the students breaking ?1 . Dont arrive late for class.2 . Dont run in the hallways.3 . Dont eat in the classroom.4 . Dont listen to the music in the classroom or the hallways.5. Dont fight. School rules Dont eat in class.We cant eat in class .Dont fight .We cant fight .What else cant we do ?What other things cant we do ?What rules are they breaking?Dont sleep in class.We cant sleep in class Dont play computer games.We cant play computer games .Dont use telephone in class.We cant use telephone in classDont play cards in school.We cant play cards in school.family rules .n nDont watch TV at home on school nights .Dont watch TV at home on school nights .n nDont eat on the bed .Dont eat on the bed .n nClean your bedroom by yourself.Clean your bedroom by yourself.n nDont sleep too late on Sunday .Dont sleep too late on Sunday .n nDont play the guitar at night .Dont play the guitar at night .n nHelp parents do some housework.Help parents do some housework.n nDo homework before 10 oclock .Do homework before 10 oclock .Library rules n nDont write on the books or magazines .n nDont eat or drink .n nDont run or fight inside .n nDont listen to music inside .n nDont use the telephone . n nKeep quiet . Can we arrive late for class?No , we cant . We cant arrive late for class.“ Dont arrive for class” We have to arrive early for school. Grammar祈使句祈使句 表示请求，命令等语气的句子，其结构为省去表示请求，命令等语气的句子，其结构为省去表示请求，命令等语气的句子，其结构为省去表示请求，命令等语气的句子，其结构为省去youyou的简单句的简单句的简单句的简单句, ,祈使句的开头祈使句的开头祈使句的开头祈使句的开头是东西原形，其否定形式是在动词原形前面加上是东西原形，其否定形式是在动词原形前面加上是东西原形，其否定形式是在动词原形前面加上是东西原形，其否定形式是在动词原形前面加上do notdo not或者或者或者或者dontdont。肯定祈使句肯定祈使句肯定祈使句肯定祈使句Sit downSit down . .Come in . Come in . Eat at home Eat at home . . Listen to music .Listen to music . Do your homework at home .Do your homework at home . . . 否定祈使句 DontDont sit down . sit down .DontDont come in . come in . Dont eat at home .eat at home . Dont listen to music .listen to music . Dont dodo your homework at home . your homework at home . Grammar n nhave to have to ， has to has to 不得不不得不不得不不得不n nhave to have to dodo s.ths.th 不得不做某事不得不做某事不得不做某事不得不做某事n nOn On 用于表示具体某一天或是某一天上午，下午，用于表示具体某一天或是某一天上午，下午，用于表示具体某一天或是某一天上午，下午，用于表示具体某一天或是某一天上午，下午，晚上晚上晚上晚上 on a winter night on a winter night on a spring morning on a spring morning on Saturday evening on Saturday evening on school night on school night on a rainy day on a rainy day on a sunny morning on a sunny morningexercise用have to 或has to 填空1.1.We clean our classroom after school.2.2.She make her bed after getting up.3.3.Its late. Mr King go to work by car.4.4.Tina and Tom join a music club ,they practice the guitar everyday.5.5.I help my mom yesterday ,because she was ill .have to has to has to have to have to Do you know this school rules?Dont talk.Dont talk.Dont listen to the music Dont listen to the music Dont eat food.No talking.No listening to the music.No food.What else do we have to do ?Discuss your school rules and family rules.homework