Unit 2 单元语法总结表（含练习）2025-2026学年人教版英语八年级上册

该初中英语单元导学案以“Home Sweet Home”为主题，聚焦情态动词can/could的用法，通过语法总结模块（含定义、用法、区别、常见错误）与巩固练习（语法填空、句型转换、单句改错）的结合，构建从概念理解到用法辨析再到实践应用的递进式学习路径，引导学生系统掌握can/could表示能力、请求、推测等核心用法及差异。 亮点在于“语法用法对比+错误案例分析”的设计，通过表格对比can与could在能力、可能性、请求等方面的区别，结合“Could you help me? Yes, I could.”等典型错误案例解析，帮助学生在对比与纠错中深化理解，培养语言能力和思维品质。多样化练习与详细答案解析为学生提供从理论到实践的完整训练，也为教师实施单元语法教学提供清晰的内容框架和针对性教学支持。

新人教版八上英语U2单元语法总结表(含练习) Unit 2: Home Sweet Home 语法总结模块 1. 情态动词 can/could的用法 定义:情态动词表示说话人对某一动作或状态的态度,或表示主观设想。情态动词不能单独作谓语动词,后接动词原形。情态动词没有人称和数的变化(have to 除外)。 can的用法: 1. 表示体力或脑力方面的能力,也表示根据客观条件能做某事的能力,意为"能够,会"。 Eg: I can ride a bike. 我会骑自行车。 2. 表示请求或许可,意为"可以"。 Eg: Can I use your computer? 我可以用你的电脑吗? 肯定回答: Sure; Yes, I/you can; Of course; Certainly; No problem; OK … 否定回答:Sorry, I/you can't. I have to…; I'm afraid I/you can't. I must … 3. 表示推测,意为"可能",但当can表示猜测或怀疑时,只用于疑问句和否定句中。 Eg: He can't be only five. 他不可能只有五岁。 could的用法: 1. 是can的过去式,表示过去有能力或过去的可能性,意为"能够,会"。 Eg: He said he could swim very well when he was a child. 他说他小时候游泳游得很好。 2. 委婉地请求别人做某事。或者委婉地表示请求别人允许自己做某事。 常用句型:Could you (please) do sth.? Eg: Could you please sweep the floor? 请你扫地好吗? Could I/we do sth.? Eg: Could I hang out with my friend tonight? 我今晚可以和朋友出去逛逛吗? 肯定回答:Yes, sure; Yes, I/you can; Of course; Certainly; No problem; My pleasure. 否定回答:Sorry, I/you can't. I/You have to…; I'm afraid I/you can't. I must … 3. 表示可能性,用于对将来、现在或过去进行推测。 Eg: I can't find Tom in the classroom. He could be on the playground. 我在教室里找不到汤姆。他可能在操场上。 4. 表示惊讶、怀疑、不相信等态度,主要用于否定向或疑问句或感叹句中。 Eg: How could he be so careless? 他怎么能这么粗心? Could与Can的区别: 区别点 can could 表示能力 用于表示现在的能力 用于表示过去的能力 表示可能性 用于表示一般情况的推测 用于表示微弱的可能性或对特定情况的推测 表示请求 语气随便,常用于熟人之间或长辈对 语气更加委婉和礼貌,常用于非熟人之间或 或许可 晚辈、上级对下级的场合 晚辈对长辈、下级对上级的场合 时态 用于现在时态 通常被视为can的过去式 回答方式 用can/can't回答 一般也是用can/can't回答 常见错误: 错误: Could you help me? Yes, I could. 正确:Could you help me? Yes, I can. 修正说明:用could提问的请求,回答时应该用can,而不是could。 Unit 2 语法巩固练习 一、语法填空(can/could) ① _ you play basketball? I need a teammate. ② When I was young, I _ run very fast. ③ _ you pass me the salt, please? ④ She _ dance well when she was five years old. ⑤ _ I have a glass of water? I'm thirsty. ⑥ He _ speak two foreign languages. ⑦ _ you swim across this river? ⑧ The little girl _ sing many English songs last year. ⑨ _ you help me carry this box? It's too heavy. ⑩ _ I go out to play now, Mum? 二、句型转换 ① 原句: I can play the guitar. 转换为一般疑问句:_ _ _ the guitar? ② 原句:She could ride a bike when she was seven. 转换为否定句:She _ _ a bike when she was seven. ③ 原句:Can you help me? 作肯定回答:Yes, _ _. ④ 原句: He can speak Chinese and English. 对划线部分提问:_ _ he speak? ⑤ 原句:Could you pass me the book? 作否定回答:Sorry, _ _. ⑥ 原句:They can swim very well. 转换为一般疑问句:_ _ _ very well? ⑦ 原句:We could play football when we were children. 转换为否定句:We _ _ football when we were children. ⑧ 原句:She can sing and dance. 对划线部分提问:_ _ she do? 三、单句改错 ① Could you help me? Yes, I could. (_) ② He can to swim very well. (_) ③ She can't speaks English. (_) ④ We could played football when we were young. (_) ⑤ Can he to help me? (_) Unit 2 语法巩固练习答案 一、语法填空(can/could) 1. Can(询问现在的能力) 2. could(描述过去的能力,呼应when I was young) 3. Could(委婉请求他人做某事,用Could更礼貌) 4. could(过去的能力,呼应when she was five years old) 5. Could(委婉请求允许自己做某事) 6. can(描述现在的能力) 7. Can(询问现在的能力) 8. could(过去的能力,呼应last year) 9. Could(委婉请求他人帮忙,语气更礼貌) 10. Could(委婉请求父母允许自己外出) 二、句型转换 1. Can you play(一般现在时情态动词can的一般疑问句,将can提前,I变you) 2. couldn't ride(could的否定形式为couldn't,后接动词原形) 3. I can(Can you...的肯定回答用Yes, I can) 4. What can(对语言内容提问用what,情态动词can提前) 5. I can't(Could you...的否定回答用Sorry, I can't) 6. Can they swim(将can提前,主语they不变,动词用原形) 7. couldn't play(could的否定形式为couldn't,后接动词原形) 8. What can(对动作内容提问用what,情态动词can提前) 三、单句改错 1. could can(Could you...的回答需用can,不用could) 2. 去掉to(情态动词can后接动词原形,无需加to) 3. speaks speak(can't后接动词原形) 4. played play(情态动词could后接动词原形) 5. 去掉to(情态动词can后接动词原形,无需加to) 学科网(北京)股份有限公司 $