人教版七年级下册Unit 4sectionA3a-3c课件PPT

这是一份人教版七年级下册Unit 4sectionA3a-3c课件PPT，共23页。

课程表Unit 4Don’t eat in class.GrammarDon’t arrive late for class.Tell the rulesDon’t run in the hallways.Don’t eat in the classroom.Don’t listen to music in class.Don’t fight.Can you find out some rules?Don’t arrive late for class.Don’t run in the hallways.Don’t eat in the classroom.Don’t listen to music.Don’t fight.Imperatives 祈使句Don’t …不要做……动词原形 Watch a video about the structure of imperatives. 祈使句 Imperatives1. 标志要点：__________ , 表示 _______， _______, ______. 肯定形式以 ____________________开头。无主语动词原形开头 ( V原）命令请求建议 回到你的座位上 。___________________. 保持安静。 _________________________.Go back to your seatBe quietDon’t 动词原形（do）2. 祈使句的否定形式 : ______ + ________________ 或者 ___ + ________________否定祈使句的回答一般是 ______________. No 动词ing（doing）I won’t 别再迟到了。___________________. 禁止拍照。_________________ ; ______________ . 此处禁止游泳。______________; ______________. Don’t be late againDon’t take photosNo (taking) photosDon’t swim hereNo swimming here3. 让某人做某事 __________________________. 让某人不要做某事 ______________________. 让我们继续上课吧。___________________. 否定形式 （1） _______________________. （2）________________________.let sb do sthDon’t let us go on our lessonlet sb not do sthlet us go on our lesssonlet us not go on our lessson 情态动词can, must, have to 后面都接动词原形Let’s think:1. 情态动词在用法上有什么共同点？2. can在本单元主要表示什么含义？它还可表达什么意思？3. have to在用法上与其他情态动词有何区别？ Watch a video about the structure of imperatives. Have to & Must1 . have to 强调_________, 译为________. I am ill. I ____ ____ stay at home. We ____ _____ be quiet in the library. 客观需要 不得不2 . must 表示说话人的_________, 译为________. We ______ study hard to get good grades. 主观看法 必须have tohave to must Have to & Must3 . 否定形式的构成和含义不同 must的否定为________ 译为 ___________. have to 的否定需要借助助动词do或does, 变为___________________译为 _________. 禁止你上课大声说话。 _____________________________. 你没有必要来这里。__________________________. . 禁止;不准 不必You mustn’t speak loudly in classYou don’t have to come here mustn’t don’t/ doesn’t have to 4. 疑问句结构不同 (1) must可以用于句首构成疑问句。如果是肯定的答复,用must; 如果是否定的答复，可用 ____________ 或 needn’t (不必) , 但不能用__________. Must I go home now?— No, . You can go home later.A. mustn’t B. must C. have to D. don’t have to don’t have to mustn’t D(2) have to 疑问句形式需要__________________ 才可以进行变化。 I have to go to bed before 11:00 . (改为疑问句） ____________________________________ ? Alice has to wear the school uniform on school days. (同上) _________________________________________? 借助助动词 do/doesDo you have to go to bed before 11:00Does Alice have to wear the school uniform on...Let's practice.Use the words to make questions about the rules. Then write answers according to your school.1. Be quite? Q: Does she have to be quite in the library? (she/have to/in the library) A: Yes, she does.2. Eat? Q: ________________________________ (he/ have to/ in the dining hall)? A: ________________________Does he have to eat in the dining hall?Yes, he does.Let's practice.3. Listen to music? Q: ________________________________ (we/ can/ in the hallways)? A: ________________ 4. Wear a hat? Q: _______________________________ (we/ can/ in the classroom)? A: _______________Can we listen to music in the hallways?Can we wear a hat in the classroom?No, we can’t.No, we can’t.Exercise.(永州中考) David, _______ make trouble at school.1. don't do can't doesn't【A】【B】【C】【D】可点击Exercise.(凉山州中考) —Mom, can I play computer games this evening?—_______ your homework first, and then we’ll talk about it.2. Finishing To finish Finish Finished【A】【B】【C】【D】可点击Exercise.(怀化中考) Buses _______ stop when the traffic lights turn red.3. can must may doesn't【A】【B】【C】【D】可点击Exercise.(凉山州中考) We should keep quiet in the library. We ______ speak loudly ( 大声地).4. must needn't can mustn't【A】【B】【C】【D】可点击Exercise.(北京中考) I ______ go now, or I’ll miss my train.5. can might must could【A】【B】【C】【D】可点击Exercise.He ______ stay at home, because it’s raining outside.6. have to can't must has to【A】【B】【C】【D】可点击按要求完成下列句子, 每空一词(含缩写)。1. You can’t play basketball like that. (改为祈使句) _____ _____ basketball like that. 2. He has to go to a movie this weekend. (变一般疑问句) _____ he ______ to go to a movie this weekend? 3. Does your mother have to work on weekends? (改为肯定句) My mother ____ ___ work on weekends. 4. He has to wear a hat. (对划线部分提问) ____ ____ __ _____ to wear? （改为一般疑问句并做否定回答） ______________________.Don’t play Does have What does he have has toDoes he have to wear a hat?--No, he doesn't have to./ he needn't. Thank you