Unit 2 语法专题（情态动词must_mustn’t_have to_祈使句）专项知识点及练习 2025-2026学年人教版英语七年级下册

Unit 2 No Rules, No Order 语法专题:(情态动词must/mustn’t/have to/祈使句) 一、核心语法 —— 知识点精讲(学生必背) 1. 情态动词must/mustn’t的用法(核心必考) 用法:表示“必须、一定”(must)和“禁止、不许”(mustn’t),用于表达规则、义务和禁止性要求,贴合本单元“规则”主题。 标志词:must(必须), mustn’t(禁止,= must not) 结构(所有主语通用,无变化): 肯定(必须做):主语 + must + 动词原形 + 其他 否定(禁止做):主语 + mustn’t + 动词原形 + 其他 疑问(必须做吗?):Must + 主语 + 动词原形 + 其他? (回答:Yes, 主语 + must. / No, 主语 + needn’t.) 例句(贴合单元话题): ① We must follow the school rules.(肯定句:我们必须遵守校规。) ② You mustn’t run in the hallways.(否定句:你不许在走廊里跑。) ③ —Must I finish my homework first? —Yes, you must.(疑问句及回答:我必须先完成作业吗?是的,你必须。) 2. 情态动词have to的用法(重点必考) 用法:表示“不得不、必须”,强调客观原因(如规则、环境、他人要求),与must(主观意愿)有所区别,本单元重点考查基本用法。 标志词:have to(原形), has to(三单), don’t have to(否定), doesn’t have to(三单否定) 主语分类: 第三人称单数(he, she, it, 单数名词):has to 非第三人称单数(I, we, you, they, 复数名词):have to 结构: 肯定:主语(三单) + has to + 动词原形 + 其他;主语(非三单) + have to + 动词原形 + 其他 否定:主语(三单) + doesn’t have to + 动词原形 + 其他;主语(非三单) + don’t have to + 动词原形 + 其他 疑问:Do + 主语(非三单) + have to + 动词原形 + 其他? / Does + 主语(三单) + have to + 动词原形 + 其他? 例句(贴合单元话题): ① He has to wear the school uniform at school.(三单肯定句:他在学校必须穿校服。) ② We don’t have to arrive early on weekends.(非三单否定句:我们周末不必早到。) ③ —Does she have to keep quiet in the library? —Yes, she does.(三单疑问句及回答) 3. 祈使句(易错重点) 用法:用于表达命令、请求、建议或禁止,多用来发布规则(本单元核心用法),主语通常省略(默认是you)。 结构(3种,贴合单元规则话题): 1. 肯定祈使句(要求做某事):动词原形 + 其他 2. 否定祈使句(禁止做某事):Don’t + 动词原形 + 其他 3. 委婉祈使句(建议做某事):Please + 动词原形 + 其他(可放句首或句末) 例句(贴合单元话题): ① Be quiet in class.(肯定:在课堂上保持安静。) ② Don’t talk in the reading room.(否定:不要在阅览室说话。) ③ Please close the door. / Close the door, please.(委婉:请关门。) 4. 常用句型(贴合本单元规则话题,必考) We must / have to + 动词原形.(我们必须做某事。) You mustn’t / Don’t + 动词原形.(你不许做某事。) Must I / Do I have to + 动词原形?(我必须做某事吗?) Please + 动词原形.(请做某事。) 二、核心语法 —— 专项练习题(基础 + 提高) 一、用所给动词的正确形式填空 1. We _ (must) follow the school rules. It’s important. 2. He _ (have to) get up early every morning because he has to go to school. 3. _ (not run) in the hallways. It’s dangerous. 4. —What _ we _ (do) in class? —We must listen to the teacher carefully. 5. She _ (not have to) wear a hat today. It’s not cold. 6. _ (be) quiet! The teacher is talking. 7. They _ (mustn’t) talk loudly in the library. 8. My brother _ (have to) finish his homework before watching TV. 9. _ (please, close) the window. It’s windy outside. 10. —Must we clean the classroom now? —No, you _ (needn’t). You can do it after school. 二、单项选择 ( ) 1. —_ I wear the school uniform today? —Yes, you must. A. Can B. Must C. Do ( ) 2. You _ run in the street. It’s very dangerous. A. mustn’t B. must C. have to ( ) 3. He _ get up at 6:30 every morning. He has to catch the school bus. A. have to B. has to C. mustn’t ( ) 4. _ quiet in the reading room. Don’t talk loudly. A. Be B. Is C. Are ( ) 5. —Does she have to finish her homework first? —No, she _. A. doesn’t B. isn’t C. can’t ( ) 6. We _ follow the traffic rules when we go out. A. can B. must C. don’t have to ( ) 7. —What _ you do in the library? —We must keep quiet. A. can B. must C. do ( ) 8. _ talk in class. The teacher is giving a lesson. A. Don’t B. Doesn’t C. Can’t ( ) 9. My sister _ wear a coat today. It’s hot outside. A. has to B. doesn’t have to C. must ( ) 10. Please _ the door when you leave the classroom. A. close B. closes C. closing 三、句型转换 1. We must keep quiet in the library.(否定句)We _ _ keep quiet in the library. 2. He has to wear the school uniform.(一般疑问句)_ he _ to wear the school uniform? 3. Don’t run in the hallways.(改为肯定祈使句)_ in the hallways. 4. They have to finish their homework on time.(否定句)They _ _ to finish their homework on time. 5. Must I arrive early?(否定回答)No, you _. 6. She must clean her room every day.(对划线提问)_ _ she _ every day? 7. We have to be on time for class.(一般疑问句)_ we _ to be on time for class? 8. Be quiet.(改为委婉祈使句)_ _ quiet, please. 四、用must/mustn’t, have to/doesn’t have to, 动词原形填空 1. I _ finish my homework first. My mother asks me to do it. 2. You _ talk loudly in the cinema. It’s a rule. 3. He _ get up early on weekends. He can sleep late. 4. _ (be) on time! Don’t be late for school. 5. We _ follow the rules. It’s good for us. 6. —_ she _ wear a uniform? —Yes, she does. 7. _ (not eat) in class. It’s not allowed. 参考答案 一、用所给词的适当形式填空 1. must 2. has to 3. Don’t run 4. must; do 5. doesn’t have to 6. Be 7. mustn’t 8. has to 9. Please close 10. needn’t 二、单项选择 1.B 2.A 3.B 4.A 5.A 6.B 7.B 8.A 9.B 10.A 三、句型转换 1. must not 2. Does; have 3. Run 4. don’t have 5. needn’t 6. What must; do 7. Do; have 8. Be; quiet 四、用must/mustn’t, have to/doesn’t have to, 动词原形填空 1. have to 2. mustn’t 3. doesn’t have to 4. Be 5. must 6. Does; have 7. Don’t eat 学科网(北京)股份有限公司 $