Unit 4 Our Memory Section B 2a-2c 词汇课件 2026-2027学年人教版九年级英语上册

Unit 4 Our Memory Section B (2a-2c Vocabulary) 通过本节课的学习，学生能够： 1. 通过整体阅读，把握文章主旨，理解短期记忆与长期记忆的区别，并归纳文章介绍的四类记忆提升方法； 2. 借助思维导图梳理文章结构，学会对比、归纳文中不同记忆策略； 3. 运用记忆技巧，乐于和同伴交流有效的学习方法； 4. 树立劳逸结合、健康学习的意识。  Learning objectives Look and discuss Look at the pictures and discuss with your partners. What things do they probably forget? Brainstorm Brainstorm. What memory techniques do you use? Are they useful? ● Repeat the knowledge many times. ● Write down key points and take notes. ● Draw mind maps to memorize. ● Link new knowledge with old things. ● Listen to the recording again and again. ● ... They are useful. They help me organize information clearly and help me remember things for a long time. Use affixes to create as many new words as possible. Use your dictionary. 2a root act, forget, effect prefix re-, un- suffix -ion, -ive, -or, -ful, -able, -ness, -ly Use affixes to create as many new words as possible. Use your dictionary. 2a react action active actor forgetful forgettable forgetfulness unforgettable effective effectively effectiveness Complete the sentences with the correct forms of the words from the word cloud. 2b The customer ________ badly to the price increase. Starting over is not easy, but it is necessary in my ________. His memory technique is simple but ________. The man has lost a lot of blood. He is ________ to die of wounds if not treated at once. Our hotel is in a great ________ near the central mall. I can’t recall which notebook I wrote your email ________ in. reacted case effective likely position address Research shows that many animals have good long-term memories. They _____________ where food can be found and where it is safe. For example, when squirrels ___________ of food, they go straight to the place where they hid nuts. Every autumn, wild geese fly thousands of kilometres south for the winter. Humans do not know for sure what ____________ their minds during the journey, but wild geese seldom get lost. A similar situation ___________ dolphins. They can recognize voices of other dolphins—even when they have not met each other for a long time. Complete the passage with the correct forms of the phrases in the box. Which animal impressed you the most? go through run out happen to keep in mind keep in mind run out goes through happens to /nʌt/ n. 坚果 /ˈrekəɡnaɪz/ v. 辨认出 /ˈskwɪrəl/ n. 松鼠 /ˈdɒlfɪn/ n. 海豚 2c Which animal impressed you the most? ① Squirrel（松鼠） The squirrel impressed me the most. It has great long‑term memory. It can remember where it hid nuts. When it runs out of food, it can find those nuts easily. I think it is very clever. 中文：松鼠给我的印象最深。它有很好的长时记忆。它能够记住自己藏坚果的位置。当食物吃完时，它可以轻松找到那些坚果。我觉得它很聪明。 Which animal impressed you the most? ② Wild geese（大雁） Wild geese impressed me the most. They fly thousands of kilometres for winter every year. They seldom get lost on such a long trip. Their amazing memory helps them finish the long journey. 中文：大雁给我的印象最深。它们每年飞行数千公里去过冬。这么漫长的旅途它们却很少迷路。惊人的记忆力帮助它们完成长途迁徙。 Which animal impressed you the most? ③ Dolphins（海豚） Dolphins impressed me the most. They have wonderful memories too. They can recognize other dolphins’ voices even after a very long time. It is really amazing. 中文：海豚给我的印象最深。它们也拥有很棒的记忆力。即使隔了很长时间，它们依然可以辨认其他海豚的声音。这真的很令人惊叹。 词缀 一、什么是词缀？ 英语单词并不是凭空出现的，它们大多由「词根 + 词缀」组合而成。词缀是加在词根上、用来改变单词含义或词性的那部分字母组合。就像中文里的「偏旁部首」一样，掌握了词缀，我们就能「望词生义」，遇到生词也能猜出个大概。 词缀分为两大类：一类叫「前缀」，加在单词前面，主要用来改变单词的意思；另一类叫「后缀」，加在单词后面，主要用来改变单词的词性（比如把动词变成名词、把形容词变成副词等），有时也会改变意思。 二、常见前缀 1. un- 表示「不、非、相反」（加在形容词、副词前面） happy（高兴的）→ unhappy 不高兴的 lucky（幸运的）→ unlucky 不幸的 usual（平常的）→ unusual 不寻常的 able（能干的）→ unable 不能的 friendly（友好的）→ unfriendly 不友好的 true（真实的）→ untrue 不真实的 2. dis- 表示「不、否定、相反」（多加在动词、形容词前面） like（喜欢）→ dislike 不喜欢 agree（同意）→ disagree 不同意 appear（出现）→ disappear 消失 honest（诚实的）→ dishonest 不诚实的 believe（相信）→ disbelieve 不相信 3. in- / im- / il- / ir- 表示「不、非」 in- 加在大多数字母前，如 in + correct = incorrect（不正确的）。 im- 加在以 b、m、p 开头的词前，如 im + possible = impossible（不可能的）、im + polite = impolite（不礼貌的）。 il- 加在以 l 开头的词前，如 il + legal = illegal（非法的）。 ir- 加在以 r 开头的词前，如 ir + regular = irregular（不规则的）。 记忆口诀：b、m、p 前用 im；l 前用 il；r 前用 ir；其余用 in。 4. re- 表示「再、有一次、重新、回」（加在动词前） write（写）→ rewrite 重写 build（建造）→ rebuild 重建 turn（转）→ return 返回、归还 use（使用）→ reuse 重复使用 tell（告诉）→ retell 复述 cycle（循环）→ recycle 回收利用 5. pre- 表示「在……之前、预先」 view（看）→ preview 预览 pay（支付）→ prepay 预付 pare（准备）→ prepare 准备 history（历史）→ prehistory 史前 6. mis- 表示「错误、误」 understand（理解）→ misunderstand 误解 take（拿）→ mistake 弄错 7. over- 表示「过度、过分、在上方」 weight（重量）→ overweight 超重的 work（工作）→ overwork 过度工作 time（时间）→ overtime 加班 come（来）→ overcome 克服 8. under- 表示「在……下面、不足」 ground（地面）→ underground 地下的 water（水）→ underwater 水下的 9. inter- 表示「在……之间、相互」 national（国家的）→ international 国际的 view（看）→ interview 面试、采访 10. 其他常见前缀 sub- 表示「在下面、次」 subway 地铁（地下的路） subtitle 副标题、字幕 super- 表示「超级、超过」 supermarket 超市 superman 超人 auto- 表示「自己、自动」 一、用方框中单词的正确形式填空（注意词性变化）。 词库：address / likely / react / position / case / effective She _________ quickly when she heard the strange noise. Please write down your home _________ on the form. If you don't study hard, you are _________ to fail the exam. This new method is very _________ for learning English. In my _________, I would choose the blue one. Can you tell me the _________ of the library on this map? reacted address likely effective case position 二、用括号内所给词的适当形式填空。 1. When he heard the bad news, he ________ (react) to it in a quiet way. 2. This kind of medicine is ________ (effect) for people with colds. 3. If people are not treated in time, they may ________ (death) of serious wounds. 4. He was disappointed that his best friend didn't ________ (act) to his wedding invitation for weeks. 5. The kindness of the local people during our trip made the journey truly ________ (forget). reacted effective die react unforgettable 课堂总结 类型 词缀 主要功能 前缀 re-, un- 改变词义（方向、否定） 后缀 -ion, -ness 构成名词 -ful, -able, -ive 构成形容词 -or 构成名词（指人/物） -ly 构成副词 Homework Write some words with affixes we learn today. Preview the next period. 20 $