Unit5知识点-Section A 3a-3d讲义2026-2027学年人教版英语九年级上册

本初中英语讲义聚焦九年级上册Unit 5 Section A 3a-3d核心知识点，围绕“收音机的发明及其影响”，系统梳理useful, invention等词汇、It has to be...等句型及被动语态语法点，通过“词汇-句型-语法-短语”递进式学习支架，帮助学生构建知识脉络。 资料特色在于融合语言能力与文化意识培养，通过中英互译、完成句子等练习强化词汇句型运用，结合马可尼发明背景渗透科技史文化。综合练习中的课文问答引导学生分析收音机对世界的影响，培养思维品质，课中辅助教师高效授课，课后助力学生自查巩固，弥补知识盲点。

九年级英语上册Unit5知识点-Section A 3a-3d讲义 【课文要点】 1. What do you think is the most useful invention of all time, Peter? Peter，你认为有史以来最有用的发明是什么？ - of all time 有史以来 - useful adj. 有用的 - invention n. 发明 - e.g. What is the most ____________ invention of all time? 2. It has to be the radio. 一定是收音机。 - It has to be... 一定是……（表示强烈推测） - radio n. 收音机，无线电 - e.g. It ____________ to be the radio. 3. Before the radio was invented, information travelled very slowly. 在收音机发明之前，信息传播得非常慢。 - be invented 被发明 - information n. 信息（不可数名词） - travel v. 传播，旅行 - slowly adv. 慢地 - e.g. Before the radio ____________ invented, information travelled very slowly. 4. The world was made much smaller by the radio. 收音机让世界变得更加小。 - make + 宾语 + 形容词 使……变得…… - e.g. The world ____________ made much smaller by the radio. 5. Suddenly, news could be spread around the world in seconds. 突然间，新闻可以在几秒钟内传播到世界各地。 - spread v. 传播（过去式 spread） - around the world 世界各地 - in seconds 几秒钟内 - e.g. News could be ____________ around the world in seconds. 6. An Italian inventor called Guglielmo Marconi. He developed the idea in the 1890s. 一位名叫古列尔莫·马可尼的意大利发明家。他在19世纪90年代发展了这个想法。 - Italian adj. 意大利的 - inventor n. 发明家 - called adj. 名叫……的 - develop v. 发展，开发 - e.g. An Italian ____________ called Guglielmo Marconi. 7. In 1901, a radio message was sent across the Atlantic Ocean for the first time. 1901年，一个无线电信息首次被发送穿越大西洋。 - message n. 信息，消息 - across prep. 穿越 - Atlantic Ocean 大西洋 - for the first time 第一次 - e.g. A radio message was ____________ across the Atlantic Ocean. 8. That was quite a distance at that time. 那在当时是相当远的距离。 - distance n. 距离 - at that time 在那时 - e.g. That was quite a ____________ at that time. 9. And because of the radio, some other important inventions were developed as well. 因为收音机，一些其他重要发明也被发展起来了。 - because of 因为 - as well 也，同样 - e.g. Some other important inventions were developed ____________ well. 10. It also had a big effect on music. 它对音乐也有很大的影响。 - have an effect on 对……有影响 - e.g. It also had a big ____________ on music. 11. The radio made it much easier for people to enjoy music from artists around the world. 收音机让人们更容易欣赏来自世界各地艺术家的音乐。 - make it + 形容词 + for sb. to do 使某人做某事变得…… - artist n. 艺术家 - e.g. The radio made it much ____________ for people to enjoy music. 【高频短语汇总】中英互译 1. of all time __________ 2. __________ 有史以来 3. have to be __________ 4. __________ 一定是 5. around the world __________ 6. __________ 世界各地 7. in seconds __________ 8. __________ 几秒钟内 9. for the first time __________ 10. __________ 第一次 11. at that time __________ 12. __________ 在那时 13. because of __________ 14. __________ 因为 15. as well __________ 16. __________ 也，同样 17. have an effect on __________ 18. __________ 对……有影响 19. make it + adj. + for sb. to do __________ 20. __________ 使某人做某事变得…… 【综合练习】 一、根据汉语意思完成句子 1. 你认为有史以来最有用的发明是什么？ What is the most useful ________ of all time? 2. 一定是收音机。 It ________ to be the radio. 3. 在收音机发明之前，信息传播得非常慢。 Before the radio was ________, information travelled very slowly. 4. 收音机让世界变得更加小。 The world was ________ much smaller by the radio. 5. 新闻可以在几秒钟内传播到世界各地。 News could be ________ around the world ________ seconds. 6. 一位名叫古列尔莫·马可尼的意大利发明家。 An Italian ________ called Guglielmo Marconi. 7. 一个无线电信息首次被发送穿越大西洋。 A radio message was sent ________ the Atlantic Ocean for the ________ time. 8. 因为收音机，一些其他重要发明也被发展起来了。 ________ of the radio, some other important inventions were developed as ________. 9. 它对音乐也有很大的影响。 It also had a big ________ on music. 10. 收音机让人们更容易欣赏音乐。 The radio made it ________ for people to enjoy music. 二、单项选择 ( ) 1. What is the most useful invention ________ all time? A. to B. for C. of D. with ( ) 2. It ________ to be the radio. A. have B. has C. had D. having ( ) 3. Before the radio was invented, information travelled very ________. A. slow B. slower C. slowly D. slowest ( ) 4. News could be spread around the world ________ seconds. A. to B. for C. with D. in ( ) 5. A radio message was sent across the Atlantic Ocean ________ the first time. A. to B. for C. with D. of ( ) 6. That was quite a distance ________ that time. A. to B. for C. at D. with ( ) 7. ________ of the radio, some other inventions were developed. A. Because B. Because of C. As D. Since ( ) 8. It also had a big effect ________ music. A. to B. for C. with D. on ( ) 9. The radio made it much easier for people ________ music. A. enjoy B. to enjoy C. enjoying D. enjoyed ( ) 10. A radio message was sent ________ the Atlantic Ocean. A. across B. through C. over D. above 三、用所给词的正确形式填空 1. The radio ________ (make) the world much smaller. 2. News could be ________ (spread) around the world in seconds. 3. An Italian inventor ________ (call) Guglielmo Marconi developed the idea. 4. A radio message was ________ (send) across the Atlantic Ocean. 5. Some other important inventions were ________ (develop) as well. 6. The radio had a big effect on ________ (music). 7. It made it much ________ (easy) for people to enjoy music. 8. The radio was ________ (invent) by Guglielmo Marconi. 四、根据课文内容回答问题 1. What does Peter think is the most useful invention of all time? ____________ 2. Who invented the radio? ____________ 3. When was the idea of the radio developed? ____________ 4. When was a radio message first sent across the Atlantic Ocean? ____________ 5. How did the radio change the world? (Give three points) ____________ 【答案】 一、 1. invention 2. has 3. invented 4. made 5. spread, in 6. inventor 7. across, first 8. Because, well 9. effect 10. easier 二、 1. C 2. B 3. C 4. D 5. B 6. C 7. B 8. D 9. B 10. A 三、 1. made 2. spread 3. called 4. sent 5. developed 6. music 7. easier 8. invented 四、 1. The radio. 2. Guglielmo Marconi. 3. In the 1890s. 4. In 1901. 5. It made the world smaller; news could be spread quickly; it helped develop other inventions like television; it had a big effect on music. (任选三点) 1 学科网（北京）股份有限公司 $