Unit 2 Section A Grammar Focus～3d(课件PPT)-【鼎成中考·活页好题】2025-2026学年新教材七年级下册英语（人教版）

Unit 2 No Rules No Order Section A Grammar Focus~3d queue jump the queue wait for just leave absent be absent from shh quietly put on belt feed noise n. 队 插队 等待 adv.只是；正好 v. 离开；留下 adj.缺席的：不在的 缺席不在 interj 嘘(用以让别人安静下来) adv.轻声地：安静地 戴上；穿上；增加 n. 安全带；腰带；皮带 v. 喂养；饲养 n.声音；噪声 Words & Expressions Presentation 3a 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. 祈使句一般用来表示请求、命令、劝说、号召、警告等。祈使句的主语一般是第二人称you, 但往往省略。祈使句的肯定式以动词原形开头，否定式在动词原形前加 don't 。 Just go along this street and turn left. Be careful when you cross the street. Don't be late for class. Don't cheat in the exam. 为表示礼貌，祈使句经常在句首或句末加please。句末用please 时，前面通常加逗号。 Please write and tell me about yourself. Come in,please. 祈使句 以let开头的句子也是祈使句的一种结构，常用于第一人称和第三人称，表示建议、 邀请和劝说等。 Let me tell you the way to my house. Let's see the lions. Let him come in. Let them play basketball with us. 祈使句 情态动词表示说话人的语气和情态，不能独立作谓语，只能和主要动词一起构成谓语。常见的情态动词有can、may、could、must、have to、should、would等，其后动词使用原形。情态动词一般没有人称和数的变化，它的否定式一般是在其后加not构成，在一般疑问句中通常将其提到句首。 情态动词 can & must的用法 can (1)表示能力 We can speak a little English. I can play badminton,but I can't play volleyball. He could swim when he was only six. (2)表示许可 You can play basketball at the weekend. We can't run in the hallways. must 表示“必须” Don't arrive late for class.We must be on time. You must read a book before you watch TV. have to的用法 have to 表示“不得不；必须”。 例如： We have to be quiet in the library. She has to do her homework first when she gets home. have to 表示“必须”时,与must 意义很接近，有时可与must 互换。 例如： We have to/must follow the rules. must VS have to (1)must 通常表示的是说话人的主观看法，语气比较强烈,have to往往强调客观需要。 We must hurry. I don't want to miss the beginning of the show. We have to hurry.The train is leaving in five minutes. (2)它们的否定式含义大不相同。mustn’t 表示“不准；禁止”, 而don't have to表示“不必”。 You mustn't talk to your mother like that. You don’t have to come if you don’t want to. must VS have to (3)must 没有人称和数的变化，而have to有人称和数的变化。I/We/You/They must do something about it. I have to finish my work today. She has to work late today. They have to get to the station before five o’clock. have to 的句型结构 肯定句： 否定句： 一般 疑问句： 回答： 划线提问： I have to do my homework. I don't have to do my homework. Do you have to do your homework? Yes, I do. / No I don't. What do you have to do? 主语+have/has to +其他 主语+don’t have to +其他 Do +主语+don’t have to +其他? Yes, 主语+do. No,主语+don't. What do +主语+have to do? He has to eat breakfast quickly. 否定句: 一般疑问句： 回答： 划线提问： He doesn't have to eat breakfast quickly. Does he have to eat breakfast quickly? Yes, he does. / No he doesn't. What does he have to do? 小试牛刀 3b Complete the sentences using can,have to /must,or can't/mustn't. 1. Don't jump the queue. You wait for your turn. 2. I feed my dog many kinds of food,but I _____ give him chocolate. It is bad for him. 3. A:Can I leave the class if I don't feel well? B:Yes,but you tell your teacher about it when you _________be absent from class. 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　 can’t　 have to/must 　 have to　 have to/must 　 must 3c Look at the first sign and read the rules. Then write the rules for the other signs. ● Don’t eat or drink. ● No eating or drinking. ● You can’t/mustn’t eat or drink. 3c Look at the first sign and read the rules. Then write the rules for the other signs. ● Don’t park. ● No parking. ● You can’t/mustn’t park. ● Don’t take photos. ● No photos. ● You can’t/mustn’t take photos. 3c Look at the first sign and read the rules. Then write the rules for the other signs. ● Don’t swim. ● No swimming. ● You can’t/mustn’t swim. ● Don’t feed birds. ● No feeding. ● You can’t/mustn’t feed birds. library school dining hall park cinema hospital 3d 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. Keep quiet.　 No food or drinks.　 Don’t listen to music.　 Library Rules In the library,we must keep quiet. We mustn’t make noise. We can’t eat or drink. We mustn’t listen to music or take photos. Language points 1.You have to/must wait for your turn. 不及物动词，主要意思是 “等待；等候”。 常见搭配有 “wait for + 人 / 物”，表示 “等待某人或某物”。 I'm waiting for my friend.我在等我的朋友。 “wait to do sth.” 结构，表示 “等着做某事”。 She is waiting to cross the road.她等着过马路。 “can't wait to do sth.” 是一个常用表达，意思是 “迫不及待做某事”。 I can't wait to open my birthday presents.我迫不及待地要打开我的生日礼物。 2.Can I leave the class if I don’t feel well? leave作动词，“离开；留下；遗忘”, “leave for + 地点” 的结构，表示 “动身去某地” He leaves home at 7 o'clock every morning. 他每天早上 7 点离开家。 Leave a message, please. 请留个口信。 I left my keys at home. 我把钥匙忘在家里了。 3.I must/have to feed my dog many kinds of food... feed作动词时， “喂养；饲养”。 She feeds her cat every day.她每天喂她的猫。 其常见搭配有 “feed on/with + 食物”，表示 “以…… 为食”。 Cows feed on grass.奶牛以草为食。 many kinds of +名词，“很多种......” The zoo has many kinds of animals, like lions, tigers, and elephants.动物园有很多种动物，包括狮子、老虎和大象。 4.We mustn’t make noise. noise作名词时，“声音；噪音；喧闹声”。 Don't make so much noise.不要制造这么多噪音。 其形容词形式是 “noisy”， “嘈杂的；喧闹的”。 The street is very noisy.这条街很吵。 1. Life is like riding a bicycle. To keep your balance, you ________ keep moving. A．can B．can’t C．must D．mustn’t 2. You ________ take me to the station. My brother’s taking me. A．can’t B．mustn’t C．shouldn’t D．don’t have to 3. —Mom, I don’t want to go to school with that uniform (校服). —But you ________, honey. It’s a rule, you know that. A．have to B．can C．may 4. —Mom, ________ you go shopping with me this Sunday? —I’m afraid not. I ________ look after your grandma. You can go with your sister. A．can; have to B．can; can C．must; have to D．must; can C　 D 　 A　 A　 一、单项选择 5.别在手机上花太多时间。这对我们的健康有害。（完成译句） ________ _______ too much time on the mobile phone. It’s bad for our health. 6. food, let’s, some, take, delicious ________________________________. 7.Open the door. (改为否定句) ________ ________ the door. 8. 当你面对危险的时候，请保持冷静。 Please ________________ when you are in the face of danger. 9. 早点起床吧，不然你上学可能会迟到。 _________ early, or you may _________ school. Don’t spend　 Let’s take some delicious food　 Don’t open　 be/keep cool/calm　 Get up　 be late for　 二、根据要求完成句子 Homework 1. Read and write the sentences in Grammar Focus. 2. Do the exercises in students’ book. Thank you! $