Unit 4 Section B 2a-2c【精品课】 2026-2027学年九年级英语上册同步精品课件（新教材人教版）

Unit 4 Our Memory What do we remember? Section B 2a-2c 1 在语境中感知常见词缀的构词规则，理解本节课重点词汇与固定短语的词性、释义以及使用语境，读懂词汇在句子和简短语篇里的含义，建立系统的词汇认知。（学习理解） 01 运用词缀知识拓展衍生词汇，结合时态、主谓一致调整词汇形式完成填空练习；借助核心短语造句、完成情景练习，在句子层面完成词汇的有效输出。（应用实践） 02 把学到的构词技巧和重点表达运用到真实话题交流当中，自主借助词缀积累课外生词，围绕记忆学习相关话题发表自己的观点，养成高效记词习惯。（迁移创新） 03 教学目标 What is the video about? In the video, how does he change a word to make it mean differently? Free Talk Memorizing words with affixes. /ˈæfɪks/ progress gradual prefix suffix root Lead in 你还记得学过的 哪些词缀呢？ -ful -less un- -ing / -ed -dis -ian . . . Use affixes to create as many new words as possible. Use your dictionary. 2a act react re- -ion -ive -or action active actor Affixes can help us build vocabulary networks. Use affixes to create as many new words as possible. Use your dictionary. 2a forget forgetful -ful -able -ness un- forgettable forgetfulness unforgettable Affixes can help us build vocabulary networks. Use affixes to create as many new words as possible. Use your dictionary. 2a effective -ive -ly -ness effect effectively effectiveness Affixes can help us build vocabulary networks. Use affixes to create as many new words as possible. Use your dictionary. 2a react action active actor forgetful forgrttable forgetfulness unforgettable effective effectively effectiveness 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 Presentation Can you list more affixes ? Presentation dis -否定 dislike 不喜欢disagree 不同意 in-/im-/ir-/il- 否定 impossible 不可能irregular 不规则illegal 非法 incorrect 错误 pre - 在……之前 preview 预习 predict 预测 mis -错误 mistake 错误misunderstand 误解 over -过度 overwork 过度工作overeat 暴食 Presentation - er 人/物 teacher 教师 worker 工人computer 电脑 - ment 行为、结果 agreement 同意movement 运动 - ship 关系、状态 friendship 友谊relationship 关系 - dom 领域、状态 freedom 自由kingdom 王国 Presentation - ous 充满 …性质 dangerous 危险的famous 著名的 - y 充满…，多… rainy 下雨的 cloudy 多云的 - less 无……的 careless 粗心的hopeless 无望的 -ize / -ise 使……；变成 realize 意识到organize 组织 Tips： 前缀变词义，后缀变词性 多个词缀可叠加 先加后缀再加前缀 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 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 wild geese in the sky squirrels living on land dolphins in the ocean What is the passage about? topic sentence examples Complete the passage with the correct forms of the phrases in the box. Which animal impressed you the most? 2c 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. go through run out happen to keep in mind keep in mind run out goes through happens to 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. From squirrels to elephants, memory is nature’s gift to all living beings. And the most beautiful memory of all? The ones we keep in our hearts. 1. effective adj. 有效的 effect n. 效果 effectiveness n. 有效 反: ineffective adj. 无效果的;不起作用的 effectively adv.有效地 be effective in (doing)... 在......方面有效 effective measures 有效措施 have a harmful effect on... 对......有危害 come into effect 生效 Regular exercise is effective in keeping healthy.规律锻炼对保持健康很有效。 The government took effective measures to reducepollution. 2. The customer reacted badly to the price increase. increasing adj. 不断增长的 increased adj. 已经增长的 on the increase 在增加;在上升 The price of apples increased by 20%. 苹果的价格上涨了20%。 The temperature increased to 35℃ yesterday. 昨天温度上升到了35摄氏度。 increase by 增加了...... to 增加到...... in 在......方面增加 increase n. 增长 1. The price of rice increased 10% last month. 2. The temperature will increase 28°C tomorrow. 3. There is an (increase) number of birds in the park. 4. 加入读书俱乐部的学生人数有了大幅增长。 There has been the number of students joining the reading club. 5. 新的熊猫展区开放后，当地动物园的游客数量增长了50%。 The local zoo's visitor count after the new panda exhibit opened. by to increasing a big increase in increased by 50% 3. They can recognize voices of other dolphins. recognize (=recognise) v. 辨认出; 认可 recognition n.认出;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。 recognize sb / sth 认出/认可某人/某物 ...as... 把......认作/看作...... that / wh-从句 意识到;承认...... 一、根据导图中的词根和词缀写单词,并根据词性提示,写出对应的 词义。 1. useful 有用的；实用的 usable 能用的；可用的 usefulness 有用；可用性 unusable 不能使用的；破烂不堪的 28 2. 3. 4. creative 创造性的；创作的 creatively 有创造力地 creativeness 创造性 acceptable 认同的，认可的 unacceptable 难以接受的；不能容忍的 redirect directive 指示的；指导的 direction 方向；方位 director 导演；主任；董事 29 二、用方框中所给单词或短语的适当形式填空,使短文意思完整、通顺。 memory image likely efficient colour passage retell divide mix up technique Lisa always found it hard to 5. __________ long texts for her history class. Facing a difficult 6. ________ about ancient wars,she knew she needed a new method. Her teacher suggested a useful 7. _________:Turning information into a mind map or a 8. _________ graph. First,she would 9. _______ the passage into three main parts. For each part,she would draw a simple 10. _______ to represent（代表） it. For example,for a part about a famous battle（战役）,she marked two tiny flags. This visual（视觉的） method made it more 11. ______ for the facts to stick in her mind. After studying,she would 12. ______ the content to her younger sister without memorize passage technique colourful divide image likely retell 30 looking at her notes. Sometimes she would 13. ________ the dates,but correcting herself helped her learn better. Through consistent（持续的） practice,she managed to master historical events and their details 14. __________.#1 mix up efficiently 从方框中选出下列句子中黑体单词的词义。 position A.（n.）位置；地方 B.（v.）安置；使处于 C.（n.）职位；职务 D.（n.）态度；立场；观点 1.Jenny volunteered for the position of monitor.( ) 2.Can you find the position of China on this world map?( ) 3.She positioned the chair by the window to enjoy the view.( ) 4.After thinking carefully,she finally made her position clear.( ) C A B D 32 case A.（n.）具体情况;事例;实例 B.（n.）实情；事实 C.（n.）案件；案子 5.The lawyer took on the case even though it was very challenging.( ) 6.In this case,you should ask your teacher for help.( ) 7.If that is the case,we will need more staff next season.( ) C A B 33 view A.（v.）看；观看 B.（n.）看法,意见；态度 C.（n.）视野；视线 D.（n.）（从某处看到的）景色,风景 8.The view from the top of the tower was fantastic.( ) 9.The sun disappeared from view soon.( ) 10.In my view,it was a waste of time to attend that meeting.( ) 11.People came from all over the world to view her work.( ) D C B A 34 increase的用法 知识链接：讲解详见背记本P29考点1 1.The temperature _____________（increase） a lot since last week. 2.The number of students increased ___ 500 this term. 3.The price of the book increased ____ 20% compared with last month. 4.There has been ____ increase in the sales of this product. has increased to by an 35 divide与separate辨析 知识链接：讲解详见背记本P30考点2 5.Yesterday afternoon,the teacher ________ the class _____ three groups for the activity. 6.It’s not easy to ________ the two twins ______ each other—They look too similar. divided into separate from 36 discuss的用法 知识链接：讲解详见背记本P30考点3 7.The __________（discuss） between the two friends lasted（持续） for hours. 8.They _________（discuss） where they would go for vacation last night. discussion discussed 9.I want to discuss my future plans with you.（改为同义句） I want to _____ ___ __________ _________ my future plans with you. have a discussion about/on 37 run out与run out of辨析 知识链接：讲解详见背记本P30考点4 run out run out of 10.We ___________ our milk this morning,so I need to buy some. 11.The battery（电池） ________ yesterday,so my phone shut down. 12.I have ___________ my pens. Can you lend me one? 13.Time for the game is ____________—We need to speed up. ran out of ran out run out of running out 14.Her pocket money ran out last week.（改为同义句） She ____ ____ ___ her pocket money last week. ran out of 38 go through的用法 知识链接：讲解详见背记本P30考点5 15.老师仔细查看了我们的试卷,发现了一些共同的错误。 The teacher ______ ________ our test papers carefully and found some common mistakes. went through 16.每棵小树在长得强壮之前,都将经历风雨。 Every young tree _____ ____ ________ storms before it grows strong. will go through 39 1.The old library was going to be closed. It was a ____ day for the whole town. People walked ______ through the quiet rooms,recalling the hours they had spent here. I felt a deep ________ in my heart. This library was not only a building but also a place where dreams took root. （sad） sad sadly sadness 2.Many students wonder about the ______ of daily review on their studies. However,a consistent（持续的） 20-minute review every night is actually very _________.To test the ____________ of this method,you can try it for a month and compare your quiz（测试） scores before and after. （effect） effect effective effectiveness 40 Thanks $