Unit 4 Hands-on fun Word power要点讲义2026-2027学年译林版八年级英语上册

本讲义聚焦初中英语Unit 4 Word power模块，核心讲解形容词否定前缀un-、in-、im-的用法，从un-表“不”的基础定义切入，扩展至in-、im-的应用规则，结合lucky→unlucky等具体词例及opposite meaning等短语，构建从理解到应用的学习支架。 该资料通过系统归纳前缀规则（如im-用于m/p前），设计单选、词形转换等分层练习，助力学生提升语言能力（否定意义表达），培养思维品质（规则分析归纳），课中辅助教师高效授课，课后帮助学生自主巩固查漏，强化学习效果。

Unit 4 Hands-on fun Word power 【课文要点】 1. One of the most common prefixes for adjectives is un-. It means “not”. 形容词最常见的前缀之一是un-。它的意思是“不”。 - prefix n. 前缀 - common adj. 常见的 - un- 表示“不”，加在形容词前构成反义词 - e.g. The prefix un- means “____________”. 2. We add it to some adjectives to give them the opposite meaning. 我们把它加在一些形容词前，使它们具有相反的意思。 - add...to 把……加到……上 - opposite adj. 相反的 - e.g. We add un- to some adjectives to give them the ____________ meaning. 3. We can also use some other prefixes, such as in- and im-, to form new adjectives with the opposite meaning. 我们也可以用其他一些前缀，比如in-和im-，来构成具有相反意思的新形容词。 - such as 例如（用于列举） - form v. 构成，形成 - e.g. We can use prefixes ____________ as in- and im- to form new adjectives. 4. lucky → unlucky 幸运的 → 不幸的 - lucky adj. 幸运的（→ unlucky adj. 不幸的） - e.g. He is an ____________ boy. 5. usual → unusual 通常的 → 不寻常的 - usual adj. 通常的（→ unusual adj. 不寻常的） - e.g. This is an ____________ event. 6. correct → incorrect 正确的 → 不正确的 - correct adj. 正确的（→ incorrect adj. 不正确的） - e.g. Your answer is ____________. 7. complete → incomplete 完整的 → 不完整的 - complete adj. 完整的（→ incomplete adj. 不完整的） - e.g. The work is ____________. 8. possible → impossible 可能的 → 不可能的 - possible adj. 可能的（→ impossible adj. 不可能的） - e.g. Nothing is ____________ if you work hard. 9. polite → impolite 礼貌的 → 不礼貌的 - polite adj. 礼貌的（→ impolite adj. 不礼貌的） - e.g. It is ____________ to talk loudly in the library. 10. It’s unusual to find me without a DIY job to do. 很难找到我没有DIY工作可做的时候。 - unusual adj. 不寻常的 - e.g. It’s ____________ to find me without a DIY job. 11. It’s impossible to finish a DIY job if you’re not patient. 如果你没有耐心，完成DIY工作是不可能的。 - impossible adj. 不可能的 - patient adj. 耐心的（→ impatient adj. 不耐烦的） - e.g. It’s ____________ to finish if you’re not patient. 12. Your room is really untidy. Things are all over the floor. 你的房间真的很不整洁。东西扔得满地都是。 - untidy adj. 不整洁的（由un- + tidy构成） - all over the floor 满地都是 - e.g. Your room is really ____________. 13. It seems some of the answers in my homework are incorrect. 看来我作业中的一些答案是错误的。 - incorrect adj. 不正确的 - e.g. Some of the answers are ____________. 【前缀 un-, in-, im- 小结】 un- 不 lucky → unlucky, usual → unusual, tidy → untidy in- 不 correct → incorrect, complete → incomplete im- 不（用在m/p前） possible → impossible, polite → impolite 【其他常见否定前缀词】 interesting uninteresting sure unsure able unable friendly unfriendly active inactive patient impatient expensive inexpensive perfect imperfect 【高频短语汇总】中英互译 1. opposite meaning ____________ 2. ____________ 相反的意思 3. add...to ____________ 4. ____________ 把……加到……上 5. such as ____________ 6. ____________ 例如 7. form new adjectives ____________ 8. ____________ 构成新形容词 9. all over the floor ____________ 10. ____________ 满地都是 11. tidy up ____________ 12. ____________ 整理，收拾 综合练习 一、单项选择 ( ) 1. The prefix un- means “____________”. A. very B. not C. too D. so ( ) 2. We add un- to some adjectives to give them the ____________ meaning. A. same B. opposite C. different D. similar ( ) 3. We can use prefixes such as in- and im- to ____________ new adjectives. A. form B. forms C. formed D. forming ( ) 4. He is an ____________ boy. A. lucky B. unlucky C. luckily D. luck ( ) 5. This is an ____________ event. A. usual B. unusual C. usually D. as usual ( ) 6. Your answer is ____________. A. correct B. incorrect C. correctly D. correction ( ) 7. Nothing is ____________ if you work hard. A. possible B. impossible C. possibly D. possibility ( ) 8. It is ____________ to talk loudly in the library. A. polite B. impolite C. politely D. politeness ( ) 9. Your room is really ____________. A. tidy B. untidy C. tidily D. tidiness ( ) 10. It’s ____________ to finish if you’re not patient. A. possible B. impossible C. possibly D. possibility 二、加前缀 un-, in- 或 im- 写出下列单词的反义词 1. lucky → ____________ 2. usual → ____________ 3. correct → ____________ 4. complete → ____________ 5. possible → ____________ 6. polite → ____________ 7. tidy → ____________ 8. patient → ____________ 9. active → ____________ 10. able → ____________ 11. sure → ____________ 12. friendly → ____________ 13. expensive → ____________ 14. perfect → ____________ 15. interesting → ____________ 三、用所给词的正确形式填空（加前缀 un-, in- 或 im-） 1. It’s ____________ (usual) to find me without a DIY job to do. 2. It’s ____________ (possible) to finish if you’re not patient. 3. Your room is really ____________ (tidy). 4. Some of the answers are ____________ (correct). 5. He is an ____________ (lucky) boy. 6. It is ____________ (polite) to talk loudly in the library. 7. The work is ____________ (complete). 8. She is ____________ (patient) and often gets angry easily. 9. This is an ____________ (interesting) movie. I fell asleep. 10. I’m ____________ (sure) about the answer. 11. He is ____________ (able) to walk after the accident. 12. She is ____________ (friendly) to new people. 13. This is ____________ (expensive). I can afford it. 14. The machine is ____________ (perfect). It has some problems. 15. He is ____________ (active) and doesn’t like to exercise. 四、用所给词的适当形式填空 1. The prefix un- means “not”. (改为一般疑问句) ____________ the prefix un- mean “not”? 2. We add un- to some adjectives. (改为否定句) We ____________ add un- to some adjectives. 3. It is ____________ (possible) to finish if you’re not patient. 4. Your room is really ____________ (tidy). 5. Some of the answers are ____________ (correct). 6. He is an ____________ (lucky) boy. 7. It is ____________ (polite) to talk loudly in the library. 8. The work is ____________ (complete). 9. She is ____________ (patient) and often gets angry easily. 10. This is an ____________ (interesting) movie. 11. I’m ____________ (sure) about the answer. 12. He is ____________ (able) to walk after the accident. 13. She is ____________ (friendly) to new people. 14. This is ____________ (expensive). I can afford it. 15. The machine is ____________ (perfect). It has some problems. 16. He is ____________ (active) and doesn’t like to exercise. 17. It’s ____________ (usual) to see him smile. 18. Your answer is ____________ (correct). Please try again. 19. Nothing is ____________ (possible) if you work hard. 20. Please be ____________ (patient) with the children. 答案 一、单项选择 1. B 2. B 3. A 4. B 5. B 6. B 7. B 8. B 9. B 10. B 二、加前缀 un-, in- 或 im- 写出下列单词的反义词 1. unlucky 2. unusual 3. incorrect 4. incomplete 5. impossible 6. impolite 7. untidy 8. impatient 9. inactive 10. unable 11. unsure 12. unfriendly 13. inexpensive 14. imperfect 15. uninteresting 三、用所给词的正确形式填空（加前缀 un-, in- 或 im-） 1. unusual 2. impossible 3. untidy 4. incorrect 5. unlucky 6. impolite 7. incomplete 8. impatient 9. uninteresting 10. unsure 11. unable 12. unfriendly 13. inexpensive 14. imperfect 15. inactive 四、用所给词的适当形式填空 1. Does 2. don't 3. impossible 4. untidy 5. incorrect 6. unlucky 7. impolite 8. incomplete 9. impatient 10. uninteresting 11. unsure 12. unable 13. unfriendly 14. inexpensive 15. imperfect 16. inactive 17. unusual 18. incorrect 19. impossible 20. patient 1 学科网（北京）股份有限公司 $