Unit 4 Our memory SectionB 2a-2c 课件 2026-2027学年人教版九年级英语上册

Section B How can we improve our memory? Vocabulary (2a-2c) 01 02 03 04 巩固复习上节课阅读部分内容，梳理文章内容与结构，借助思维导图复述课文要点，并结合自身情况制定个人记忆提升计划； 掌握词缀记单词、语境记短语两种高效记忆方法，学会自主整理单词家族，提升自主词汇积累能力；依托语境选词，培养结合上下文判断词性词义的阅读思维。 借助动物记忆力短文，感受大自然生物的智慧，引导学生学习动物长久记忆的特点，养成科学记忆、长期积累的学习习惯。 掌握常见词缀re-/un-/-ive/-ful/-able/-ion/-or/-ly/-ness，能借助词根词缀推导新词词义；熟练运用react、case、effective、likely、position、address等核心单词变形填空；借助核心短语造句、完成情景练习。 Learning objectives 、 、 Let’s watch the video. Lead-in By Yushen 、 你还记得学过的 哪些词缀呢？ -ful -less un- -able / ible -ing / -ed -tion/ -ment -dis -ian . . . 词缀分为前缀（prefix）和后缀（suffix），前缀改变词义，后缀主要改变词性。 By Yushen 、 Use affixes to create as many new words as possible. Use your dictionary. 2a 注意：英语词缀（affix）分为前缀（prefix）和后缀（suffix），它们可以附加在词根上构成新词。 re- + act → react（反应） act + -ion → action（行动） act + -ive → active（积极的） act + -or → actor（演员） re- -ion -ive -or act 、 -ness un- -ful -able forget 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） -ive -ly effect effect + -ive → effective（有效的） effect + -ive + -ly → effectively（有效地） effect + -ive + -ness → effectiveness（有效性） 、 Prefix Word Class It Attaches To Meaning Example re- verbs again, once more act → react un- adjectives not, the opposite of forgettable → unforgettable How much do you know about these affixes? Challenge: Create More Words! re- un- write → rewrite turn → return use → reuse start → restart view → review act → react happy → unhappy fair → unfair able → unable forgettable → unforgettable kind → unkind true → untrue Brainstorm 、 Suffix Word Class Shift (Original → New) Meaning Example -ion verb → noun the action, state or result of an action act → action -ive verb/noun → adjective having the quality of; tending to act → active; effect → effective -or verb → noun person or thing that performs the action act → actor -ful noun/verb → adjective full of; having a lot of forget → forgetful -able verb → adjective able to be; fit to be forget → forgettable -ness adjective → noun a state or quality forgetful → forgetfulness; effective → effectiveness -ly adjective → adverb in a ... way effective → effectively How much do you know about these affixes? -ion/-ness是名词 -ful/-able/-ive是形容词 -ly一加变副词 、 Challenge: Create More Words! -ion/-ness -ful/-able/-ive -ly act → action create → creation educate → education discuss → discussion happy → happiness kind → kindness dark → darkness weak → weakness care → careful hope → hopeful pain → painful enjoy → enjoyable read → readable wash → washable attract → attractive impress → impressive protect → protective quick → quickly slow → slowly clear → clearly gentle → gently quiet → quietly easy → easily 、 Complete the sentences with the correct forms of the words from the word cloud. 2b address likely react position case effective 1.The customer __________ badly to the price increase. 2.Starting over is not easy, but it is necessary in my _____. 3.His memory technique is simple but __________. 4.The man has lost a lot of blood. He is _______ to die from his wounds if not treated at once. reacted case effective likely 不及物动词，常搭配介词 to，表示 “对……作出反应”。 表示 “情况；状况”，固定搭配in one’s case意为 “就某人的情况而言”。 表示 “有效的”，在句中作表语/定语，与but前的simple构成转折。 固定搭配be likely to do sth表示 “很可能做某事”。 die from/of 死于… n. 增长 、 Complete the sentences with the correct forms of the words from the word cloud. 2b address likely react position case effective 5.Our hotel is in a great _______ near the central mall. 6.I can’t recall which notebook I wrote your email _______in. position address 表示 “位置”，句中 “in a great position” 指 “处于好的位置”。 表示 “地址”，此处email address是固定搭配，指 “电子邮箱地址” mall 购物商场 帮助学生运用目标词汇的正确形式（含词性、时态等变化）完成句子，巩固词汇的语境运用能力。 Do you think animals have good long‑term memories? What do you think animals should keep in mind to live? wild geese in the sky squirrels living on land dolphins in the ocean elephants living on land 帮助学生运用目标词汇的正确形式（含词性、时态等变化）完成句子，巩固词汇的语境运用能力。 Which animal impressed you the most? 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. go through run out happen to keep in mind 2c P38 goes through keep in mind run out happens to 、 They can recognize voices of other dolphins. recognize (=recognise) v. 辨认出; 认可 recognition n.认出;承认 recognize sb / sth 认出/认可某人/某物 recognize ...as... 把......认作/看作...... recognize that / wh-从句 意识到;承认...... be recognized by... 被......认定 /承认 I recognized your voice on the phone. 我在电话里听出了你的声音。 He has been recognized as a talented singer. 他已被公认为有天赋的歌手。 He recognized that he made a mistake. 他意识到自己犯了错。 The painting is recognized by experts as a masterpiece. 这幅画被专家认定为杰作。 、 Answer the questions below: What is the writer’s main idea about animals’ memory? Many animals have good long-term memories. What examples does the writer use to support this idea? Squirrels go straight to the place where they hid nuts when food runs out. Wild geese fly thousands of kilometres south without getting lost. Dolphins can recognize voices of other dolphins even after a long time. 、 Phrases summary react to sb react badly to sth start over in one’s case be likely to do sth die from be treated at once in a great position go through run out of happen to keep in mind go straight to for sure get lost 对……作出反应 某人对某事反应很差/很反感 重新开始 就某人的情况而言 很可能做某事 死于… 立即治疗 处于好的位置 经历；浏览 用完；耗尽 发生于；使遭遇 记在心中；记住 径直走向 肯定；确切地 迷路 、 Exercise 一、语法填空。 We find that the fish in the lake are __________ (increase) because the water is getting clearer. This kind of medicine is ________ (effect) for people with colds. Look! Your arm is __________ (blood) ! What’s the matter? She ___________ (recognize) him at first sight though they hadn’t met for years. We should take care of the _________ (wound) animals after the earthquake. He was disappointed that his best friend didn't ________ (act) to his wedding invitation for weeks. She uses a notebook __________ (record) her daily life. The number of students has increased _____ 200 in the past year. (填介词) increasing effective bleeding wounded recognized react to record by 、 二、翻译。 1.就我的情况而言，晚上记忆力更好。 _____ _____ _____, I have a better memory at night. 2.这座建筑被认为是该市的历史地标。 This building _____ _________ _____ a historical landmark in the city. 3.记住，遇到困难不要放弃。 _____ _____ _____: don’t give up when you meet difficulties. 4.这个女孩对这个建议反应很反感. The girl_____ _____ _____ this suggestion. 5.纸巾用完了，请买多点。 We have _____ _____ _____paper. Please buy some more. In my case is recognized as Keep in mind reacted badly to run out of By Yushen By Yushen Lavf59.27.100 Packed by Bilibili XCoder v2.0.2 $