Unit 2 No Rules,No Order Section A Grammar Focus课件 2025-2026学年人教版七年级英语下册

Unit 2 No Rules, No Order Section A Grammar Focus Walk in the hallway. Don’t run! Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter. Can we bring our phones to class? No,we can’t. We must keep them in our lockers. Can we eat snacks in class? No,we can’t eat in class. We have to eat in the dining hall. Observe and learn Which sentences are imperative sentences（祈使句）? Which sentences contain modal verbs（含有情态动词）? What are the modal verbs? 祈使句 含有情态动词 Read the sentences. Do the verbs in bold need to change forms? Why? Walk in the hallway. Don’t run! Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter. Can we bring our phones to class? No,we can’t. We must keep them in our lockers. Can we eat snacks in class? No,we can’t eat in class. We have to eat in the dining hall. No, they don’t. Because the verbs appear in imperative sentences or after modal verbs. Observe and learn 在 祈使句中 和 情态动词后，动词均用原形。 Walk in the hallway. Don’t run! Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter. 祈使句的特点 1.通常省略___________ 。 2.其肯定形式常以____________开头，否定形式是_________。 3.祈使句句尾用______或________。 主语you 动词原形 don’t 句号 感叹号 祈使句 祈使句一般用来表示请求、命令、劝说、号召、警告等。 肯定句：________ (+宾语)+其他. 否定句：_____+动词原形 (+宾语) +其他. 1. 上学日请穿校服。 Wear the school uniform on weekdays, please. Don’t watch TV before dinner. 2. 晚饭前不要看电视。 动词原形 Don’t Walk in the hallway. Don’t run! Do型祈使句 Let’s practice Don’t be 1. It’s an important meeting. (not, be) late. 2. (not, make) any noise! Your mother is sleeping. 3. (not, talk) and (read) aloud. 4. The notice on the wall says “ ”. (no smoke) 5. (look) out! A car is coming. 6. (not, let) the baby cry. 7. Let’s (not say) anything about it. Don’t talk Don’t make read No smoking Look Don’t let not say Be polite. Don’t be sad! 肯定句：____+表语+其他. 否定句：______+be+表语 +其他. 1. 下次要细心。 Be careful next time. 2. 图书馆不要吵闹! Don’t be noisy in the library! =Be quiet in the library. Be Don’t Be型祈使句 Read the sentences. Do the verbs in bold need to change forms? Why? Walk in the hallway. Don’t run! Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter. Can we bring our phones to class? No,we can’t. We must keep them in our lockers. Can we eat snacks in class? No,we can’t eat in class. We have to eat in the dining hall. No, they don’t. Because the verbs appear in imperative sentences or after modal verbs. 祈使句中 情态动词后 Let’s go. Don’t let us go. Let’s obey the rules. Let’s not break the rules. 肯定句：____+宾语+_________+其他. 否定句：____+let+宾语+动词原形+其他. 或 Let+宾语+___+动词原形+其他. 1. 咱们休息一下吧。 Let’s have a rest. 2. 不要让他去游泳。 Don’t let him go swimming. =Let him not go swimming. Let 动词原形 Don’t not Let型祈使句 Please give me a hand.（请求） 用于表达_________、 _________ 、 _________ 等语气的句子。 定义 Come in and wash your hands.（命令） Be kind to your brother.（劝告） 例句 祈使句 命令 请求 劝告 Imperative Sentences 2. Can we bring our phones to class? Yes, we can. No, we can't. 1. Can you play the guitar? Yes, I can. No, I can't. can 常用于询问能力和许可。 能力 许可 情态动词can，must,have to Sb. can/can't + V原. must 表示主观的义务和必要，多译为“必须”。 have to 表示客观需要做的事情，多译为“不得不” 1 通常省略主语you，以动词原形为开头 祈使句 2 为了让祈使句听起来比较客气、委婉，可在句首或句末加上please 3 祈使句的否定一般在句首加 don’t 特点 Imperative Sentences Complete the sentences using can, have to / must, or can’t / mustn’t. 4．A: Hey! Can I look at your book? B: Shh, we _____________ talk quietly in the library. 5．A: Can you put on your seat belt? We _____________ wear one when we’re in a car. B: Sure. Thanks! have to / must have to / must 13 2.她妈妈生病了，她不得不自己做晚饭。 Her mother is ill, she has to cook dinner by herself. 1.他必须在晚上8点前完成作业。 He must finish his homework before 8:00 in the evening. 表示个人主观想法，且没有人称和时态的变化 表示外界客观原因,有人称、数和时态的变化 have to-has to 例句展示 In groups, brainstorm three rules for one of the places below. Then draw signs to show the rules. Share your signs in class and explain what they mean. In library, we must keep quiet. We mustn’t make noise. We can’t ... library school dining hall park cinema hospital 15 Do 型祈使句 祈使句 Imperative Sentences Close the window. 肯定句 ___________ + 宾语（+ 其他）. Don’t close the window. 否定句 ________ + 动词原形（+ 其他）. 动词原形 Don’t Look at the first sign and read the rules. Then write the rules for the other signs. 17 1 情态动词没有除了have to之外，其余没有人称和数的变化 2 情态动词后跟动词原形 3 情态动词不能单独作谓语，必须和系动词或实义动词连用 特点 情态动词 Modal Verbs Complete then sentences using can, have to/ must, can’t/mustn't. Don't jump the queue. You ____________wait for your turn. I feed my dog many kinds of food, but I ___________ give him chocolate. It is bad for him. have to/must have to/must can't/mustn't Work in pairs. Choose a sign from 3c. Guess where you can see the sign and then make a conversation with your partner. A: The picture is so beautiful! I want to take a photo for it. B: No, you can’t. Look at the sign! A: What does it mean? B: It means “No photos!”. A: Oh, I know. Example: In a museum … 20 Complete then sentences using can, have to/ must, can’t/mustn't. 3. A: Can I leave the classroom if I don't feel well? B: Yes, but you ______________ tell your teacher about it when you ____________ be absent from class. must/have to have to Summary 类型 肯定式句型结构 肯定式例句 否定式句型结构 否定式例句 DO型 Do + 动词原形 (+ 其他) Look at the blackboard Don't + 动词原形 (+ 其他) 1. Don't touch that! 2. Don't be late. Let型 Let + 宾语 + 动词原形 Let her go. 1. Don't let + 宾语 + 动词原形 2. Let + 宾语 + not + 动词原形 1. Don't let her go. 2. Let her not go. Be型 Be + 形容词/名词/介词短语 1. Be quiet. 2. Be a good student. Don't be + 形容词/名词/介词短语 1. Don't be late for school. No型 No + 动名词/名词短语 1. No smoking! 2. No photos. ——（本身表禁止） —— 功能 基本用法 情态动词 can Grammar Focus have to 与 must 功能 用法区别 功能 基本结构 祈使句 What rules do we follow at the museum? Make a conversation with your partner. $