Unit4 Section B (2a-2d)课件 2026-2027学年人教版英语九年级上册

该初中英语课件聚焦词缀构词法，课堂导入通过“unhappiness”示例拆解前缀、词根、后缀，明确前缀改变意思、后缀改变词性，搭建从词根到新词的学习支架，帮助学生系统掌握构词规律。 其亮点在于融合语言能力与思维品质培养，通过多词缀单词（如unforgettable）分析和动物记忆主题阅读，引导学生在语境中应用词汇。采用“讲解-练习-拓展”模式，既提升词汇构建与语境应用能力，又培养分析推断思维，为教师提供结构化资源，助力高效教学实施。

Unit 4 Our Memory Section B Vocabulary in Use LEAD IN 加在单 词前面 前缀(prefixes) 汉语“不” 后缀(suffixes) 加在单 词后面 词性“名” 词根 单词中间 核心意思 前缀改变汉语意思，后缀改变词性 n.不幸福、不开心 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 2a Use affixes to create as many new words as possible. Use your dictionary. re- + act → react（反应） act + -ion → action（行动） act + -ive → active（积极的） act + -or → actor（演员） forget + -ful → forgetful（健忘的） forget + -able → forgettable（易被忘记的） forget + -ful + -ness → forgetfulness（健忘） un- + forget + -able → unforgettable（难忘的） effect + -ive → effective（有效的） effect + -ive + -ly → effectively（有效地） effect + -ive + -ness → effectiveness（有效性） 总结： 一个单词可含多个词缀 unforgettable = 前缀 un- + 词根 forget + 后缀 -able forgetfulness = 词根 forget + 后缀 -ful（变adj.）+ 后缀 -ness（变n.） 含前缀的单词（前缀改变意思） react re- 再次（act→“做”，react→“回做”，即反应） unforgettable un-不、未（unforgettable→“难忘的” 含后缀的单词（后缀改变词性） act + -ion → action（行动） 2b Complete the sentences with the correct forms of the words from the word cloud. 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 from his 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 1. The customer reacted badly to the price increase. 翻译：这位顾客对这次涨价反应很不好。 customer /ˈkʌstəmə(r)/n. 顾客，客户 react to 固定短语：对…… 作出反应 react badly to… 对…… 反应不好；反义：react well to… 对…… 反应良好 badly adv. 糟糕地；恶劣地，修饰动词 react，不用形容词 bad price increase 名词短语：涨价，价格上涨；increase 此处是名词 /ˈɪŋkriːs/ 增加、增长 2. Starting over is not easy, but it is necessary in my case. 翻译：重新开始并不容易，但就我的情况而言，这是有必要的。 start over 固定短语：重新开始，从头再来 Starting over 动名词短语作句子主语。 例：Reading is fun. 阅读很有趣。 necessary /ˈnesəsəri/adj. 必要的；句型：it is necessary (to do sth)（做某事）是有必要的 in one’s case 固定短语：就某人的情况而言 in my case 就我的情况；in his case 就他的情况 3. His memory technique is simple but effective. 翻译：他的记忆技巧简单但是很有效。 memory /ˈmeməri/n. 记忆力；记忆；memory technique 记忆技巧 technique /tekˈniːk/n. 技巧，方法 simple but effective 形容词用 but 连接，表示转折：简单却有效 例：He is short but strong. 他个子矮但是很强壮。 effective /ɪˈfektɪv/adj. 有效的；起作用的  辨析：effective（有效果的）；efficient 效率高的 4. The man has lost a lot of blood. He is likely to die from his wounds if not treated at once. 翻译：这名男子失血很多。如果不立刻救治，他很可能会因伤口而死亡。 lose blood 失血 be likely to do sth 固定句型：有可能做某事 He is likely to… 他很可能…… die from 死于（外因：受伤、事故）die from wounds 因伤口受伤而死 if not treated at once 状语从句的省略 完整句子：if (he is) not treated at once treat /triːt/v. 治疗；对待；treated过去分词（表被动：被救治） at once 立刻，马上 5.Our hotel is in a great position near the central mall. 翻译：我们的宾馆位置很好，就在中心商场附近。 position /pəˈzɪʃn/n. 位置；地位 in a great position 地理位置很好、区位优越 central /ˈsentrəl/adj. 中心的；中央的；名词 centre (center) →形容词 central near the central mall 介词短语作后置定语，修饰 hotel：在中心商场附近（的宾馆） 6. I can't recall which notebook I wrote your email address in. 翻译：我想不起来我把你的邮箱地址写在哪一个笔记本里面了。 recall /rɪˈkɔːl/v. 回忆起，回想；can’t recall 想不起来 宾语从句：which notebook I wrote your email address in email address 固定名词短语：电子邮箱地址 介词 in 不能丢掉：write … in the notebook 写在笔记本里面，从句末尾保留介词 in。 还原简单句：I wrote your email address in that notebook. go through　　　　　　　　　碰巧；适用于 run out　　　　　　　　　　记住 happen to　　　　　　　　　耗尽，用完 keep in mind　　 　　　　　 经历；仔细思索 cute squirrels 　　　 聪明的海豚 wild geese 　　　 可爱的松鼠 clever dolphins 　　　 大雁 Match the words with their Chinese. 2c 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 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. keep in mind run out goes through happens to 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。 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。 EXERCISE 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、用方框中短语的正确形式填空。 短语库：go through / run out of / happen to / keep in mind Many animals have amazing abilities. For example, ants always ____________ the way back to their home. When they _________ food, they can quickly find new sources. Scientists are still studying what ___________ their brains during this process. A similar thing also _________ bees — they can remember the location of flowers for a long time. Which animal do you think is the smartest? keep in mind run out of goes through happens to Lavf59.14.100 Lavf59.14.100 $