Unit 2 Period 3 课时学案 语言知识讲练(Understanding ideas)-【名师导航】2025-2026学年高中英语选择性必修第二册教师用书word（外研版）

本讲义聚焦高中英语核心词汇（如switch, motivate, access等）及语法结构（with复合结构、leave+宾语+宾补），通过教材原句提取知识点，系统梳理词性转换、固定搭配及写作应用（应用文、读后续写），构建“原句解析-讲练结合-场景运用-作业巩固”的学习支架。 资料特色在于将语言知识与真实写作场景深度融合，如每个词汇配备应用文（邀请信）和读后续写（情感描写）实例，提升语言运用能力。通过句式升级（如occupy的非谓语转换）培养思维品质，多样化课时作业（阅读理解、语法填空）助力课后查漏补缺，兼顾课中教学效率与学生自主学习需求。

Period 3　 语言知识讲练(Understanding ideas) 1．(教材原句)With the detox now finished，they've switched on their devices and they're back online． *switch v．(用开关)改变，转换 n．(电路的)开关；转变 (1)make a switch　 做出改变 (2)switch (sth．) off 关(电灯、机器等) switch (sth．) on 开(电灯、机器等) switch (from...) to... (从/由……)转变为…… 单句语法填空/单句写作 ①Mum asked me to switch off the TV set as soon as I started eating． ②If you want to switch on the light，please press the “ON”switch． ③ (应用文写作之建议信)如果你遵循我的建议，我坚信你将从一个不爱运动的人转变为运动爱好者。 If you follow my suggestions，I strongly believe that you will switch from a sofa potato to a sports lover． 2．(教材原句)I bet you're as eager as I am to find out just how many have been motivated enough to last the full seven days! *motivate v．激发，激励；成为……的动机(常用于被动语态)(motivation n．动机；积极性motivated adj．积极的，主动的) motivate sb．to do sth． 激励某人做某事 be motivated by...被…… 所激励 单句语法填空/单句写作 ①(应用文写作之邀请信)To keep them better motivated(motivate)，we intend to shoot some inspirational videos，where teachers and students are expected to give them some encouragement and best wishes within 2 minutes． ②Motivation(motivate) is what gets you started; habit is what keeps you going． ③(读后续写之情感描写)我感动得流下了眼泪，决定用心学习钢琴，对奶奶的记忆激励我日夜练习。 Moved to tears，I determined to learn piano lessons by heart and my memory of grandma motivated me to practice day and night． 3．(教材原句)But on reflection，I can see how much of my time had been occupied with checking my phone． *on reflection经再三考虑[reflect v．反映；显示；反射(声，光，热等)；认真思考，沉思 reflection n．反映；表达；映像；沉思，深思] reflect on/upon　 认真思考 单句语法填空/单句写作 ①However，for maximizing learning where mental focus and reflection (reflect) are called for，educators shouldn't assume all media are the same，even when they contain identical words． ②When we slow down，we create space to reflect on our thoughts and emotions，which helps us identify important areas of our lives and gives us the opportunity to make right choices． ③The boss refused at first，but on reflection，he realised the offer was perfect actually． ④(应用文写作之传统文化)中国传统文化反映在各种各样的节日庆祝活动中。 Traditional Chinese culture are reflected in various festival celebrations． ⑤(应用文写作之建议信)不要害怕错误和失败，你必须通过反思它们来提高自己。 Don't be afraid of mistakes and failures；you have to improve yourself by reflecting on/upon them． 4．(教材原句)But on reflection，I can see how much of my time had been occupied with checking my phone． *occupy v．占用，占去(时间、空间等)；忙着(做某事)，使忙于(做某事)；占领；占据(occupation n．职业；占领) occupy oneself with sth．/in doing sth． ＝be occupied with sth．/in doing sth．　 从事于/忙于做某事 单句语法填空/句式升级 ①The twins soon found themselves occupied(occupy)in cleaning up the kitchen while their father was occupying himself with the breakfast． ②Choosing an occupation (occupy) takes time，and there are a lot of things you have to think about． ③I occupy myself in organizing a class meeting about traditional Chinese culture at present and I am writing to ask for your suggestions． →Occupying myself in organizing a class meeting about traditional Chinese culture at present，I am writing to ask for your suggestions．(动词-ing形式短语作状语) →Occupied in organizing a class meeting about traditional Chinese culture at present，I am writing to ask for your suggestions．(过去分词短语作状语) 5．(教材原句)I knew there was a party happening that evening，but without access to social media I couldn't remember where it was! *access n．接触的机会；通道；入口 v．访问；存取(计算机文件)(accessible adj．可进入的；可使用的) (1)access to...…… 的通路；利用……的权利 have/get access to (拥有或得到)……的权利/机会 (2)be accessible to 易接近的；容易进入的 单句语法填空/单句写作 ①As cities balloon with growth，access to nature for people living in urban areas is becoming harder to find． ②He usually puts the medicine in the top drawer to make sure it will not be accessible (access) to the kids． ③(应用文写作之建议信)鉴于你对中国文化的浓厚兴趣，我建议你申请北京大学，在那里你可以接触到很好的中国文化。 Considering your keen interest in Chinese culture，I suggest you apply for Beijing University，where you can get/have access to very good Chinese culture． 6．(教材原句)Awareness of just how much we rely on social media can help us step away from it and communicate with each other better． *rely v．(为生活或生存而)依赖，依靠；信任，信赖(reliable adj．可依靠的；可信赖的) rely on sb．to do sth．＝rely on sb．doing sth．　 依靠某人做某事 rely on sb．/sth．for sth． 依靠某人/某物提供某物 rely on it that... 相信……，指望…… [名师点津]　在“rely on it＋that从句”中，it是形式宾语，真正的宾语是后面的that从句。与此类似的有“depend on/see to it＋that从句”“appreciate it＋if从句”“like/hate it＋when从句”等。 单句语法填空/一句多译 ①The innovative design requires little effort to achieve a reliable (rely) weekly supply of fresh greens． ②People rely on mobile phones for the latest news now instead of looking through newspapers like before． ③We rely on modern technology for efficient communication． ④(应用文写作之求助信)我必须依赖你来修改(polish)我的求职信和个人简介，这样我才能在暑假期间找一份兼职工作。 a．I must rely on you to polish my application letter and personal profile so that I can take a part-time job during the summer vacation．(rely on sb．) b．I must rely on it that you polish my application letter and personal profile so that I can take a part-time job during the summer vacation．(rely on it that) 词 汇 1．security n．安全 2．distract v．分散(注意力)，使分心 3．fundraising n．募捐，筹款 微 练 1．随着经济的飞速发展，人们的生活水平已经提高了，安全防范意识正在不断增强。 With the rapid development of economy，people's standard of living has improved，and the consciousness of security is increasing． 2．外面持续的噪声不断地分散她的注意力，使她难以集中精力工作。 The constant noise outside continually distracted her attention，making it difficult for her to focus on her work． 3．上周末举行了一场筹款活动，为受最近自然灾害影响的家庭筹集资金。 A fundraising event was held last weekend to raise money for families affected by the recent natural disaster． 1．(教材原句)With the detox now finished，they've switched on their devices and they're back online． *with复合结构 此句中“With the detox now finished”为with复合结构。 with复合结构在句中常作原因、条件、时间、方式或伴随状语，也可作后置定语。其结构为： ·with＋宾语＋done(表示被动或完成) ·with＋宾语＋doing(表示主动或进行) ·with＋宾语＋to do(表示将来的动作) ·with＋宾语＋介词短语/adj．/adv． 单句语法填空/单句写作 ①(读后续写之神态描写)The girl stood there quiet and still，with eyes fixed (fix) on the cartoon． ②(读后续写之环境描写)With many rolling green hills surrounding (surround) it，the landscape of the peaceful village is a feast for the eyes． ③(读后续写之情感描写)With so many problems to settle (settle) during the festival，she felt greatly stressed，as if anxiety would sweep over her into pieces． ④(读后续写之动作描写)他累坏了，拖着沉重的脚步上楼，打开门，穿着所有的衣服躺在床上。 Exhausted and tired，he trudged upstairs，opened the door and lay on the bed with all his clothes on． 2．(教材原句)An hour's sport each day left me tired out and wanting to go to bed early． *leave＋宾语＋宾语补足语 (1)“leave＋宾语＋宾语补足语”结构，意为“让/使某人(物)继续处于某种状态、某地等”。该句式中leave为及物动词，意为“使处于……；听任……”。 (2)leave＋宾语＋宾语补足语的常见构成如下： leave＋宾语＋ 单句语法填空/单句写作 ①Preschool children are remarkably bad at hiding．They often cover only their eyes with their hands，leaving the rest of their bodies exposed (expose)． ②(读后续写之动作描写)I left him sitting (sit) at the kitchen table，ran down the stairs to the driveway，and jumped on my bike． ③He is an adult now，so you'd better leave him to deal (deal) with the problem alone in the future． ④去年他在一次事故中受了重伤，这让他至今仍然很虚弱。 He was badly hurt in an accident last year，which still leaves him weak to this day． ⑤你应该制订一条规则，把东西放在能够再次找到的地方。 You should make it a rule to leave things where you can find them again． 课时提升作业(四) (Unit 2　Understanding ideas) (建议用时：45分钟　总分：84分) Ⅰ．品句填词(共5小题；每小题1.5分，满分7.5分) 1．For the security (安全) of passengers，all hand baggage is carefully checked． 2．She started studying English at college，but switched (改变) to Business in her second year． 3．The teacher often takes measures to motivate(激励) his students to work hard and efficiently． 4．The program will occupy (占用) that half-hour period before the nine o'clock news． 5．The newspaper publishes a profile(概况)of a leading sportsman every week． Ⅱ．词性转换/单句语法填空(共4小题；每小题1.5分，满分6分) 1．In contrast to my inappropriate method，it was the clever boy who found an appropriate way to handle the problem appropriately．(appropriate) 2．I am occupied with my occupation，which nearly occupies most of my time every day．(occupy) 3．If a person does not move his eyes for a long time，it means that he is distracted by something distracting．Of course，distraction is nothing new．(distract) 4．Finally I found a secure job and I could live securely．A sense of security arose in my deep heart．(secure) Ⅲ．短语填空(共5小题；每小题1.5分，满分7.5分) switch on，be occupied with，have access to，throw in the towel，rely on 1．Each of us students is occupied with too much homework，and as a consequence，we don't have leisure time． 2．Jim beat me for the fourth time in the game，so I threw in the towel． 3．I have no alternative but to rely on you to offer me a suitable way to deal with the difficult issue． 4．The boarder had the intention of switching on the light，but it turned out that there was something wrong with it． 5．There is no denying that having access to household cars enables ordinary people to travel around． Ⅳ．完成句子(共4小题；每小题2分，满分8分) 1．随着所有准备工作都已完成，我们准备前往附近的市场，预计爆米花会卖光。 With all the preparations made，we were ready to head for the nearby market，expecting to sell out our popcorn． 2．新环境很难适应，所以你能好心帮我个忙吗？ The new surroundings are difficult to adapt to，so could you be kind enough to help me? 3．我写信是想问你在即将到来的寒假你将要做什么。 I am writing to ask what you will be doing in the approaching winter holiday． 4．每天我花半个小时和我最好的朋友练习英语口语。 Every day I spend half an hour (in) practicing my oral English with my best friend． Ⅴ．补全短文(共5小题；每小题2分，满分10分) 1．To motivate citizens to work out regularly (为了激励市民定期锻炼)，our city will launch a campaign whose theme is “Put down your cell phones，and work out now．”If you are a sports lover，it's a good opportunity to 2．pick up your hobbies (重拾你的爱好)．3．You can rely on it that (你可以相信) doing exercise can be of benefit to your health and study．You should set aside some time to participate in sports although 4．(you are) occupied in studying (忙于学习)．All students can 5．have/get/obtain/gain access to the new stadium in our city (拥有使用我市新体育场的权利) and participate in the activities． Ⅰ．阅读理解(共7小题；每小题2.5分，满分17.5分) A The highly competitive mobile app market has become a hotbed for artificial intelligence adoption，leading to an explosion of AI apps．Whether a user wants to edit a photo，learn a new language or transcribe (转录) a phone call，there's usually an AI app for that． Lensa Type：Image generation and editing Lensa has taken social media by storm with its ability to generate artistic edits of selfies that users provide．Created by Prisma Labs，Lensa uses neural network，computer vision and deep learning techniques to bring mobile photography and video creation to the next level． Otter．ai Type：Transcription Available both online and as a mobile app，Otter．ai offers a wide range of services，including the ability to record Zoom and Google video conferences，as well as phone calls．It uses artificial intelligence to automatically transcribe those recordings，breaking them down by speaker．The transcription also includes an automatically generated outline，which highlights the key conversation points in the recording and allows users to jump to them quickly． Google Assistant Type：Virtual assistant Google Assistant is one of the most advanced virtual assistants of its kind on the market．Using natural language processing，it supports both voice and text commands，and can handle everything from internet searches to voice-activated control of other devices．The app is compatible (兼容的) with an entire suite of smart devices，including refrigerators，lights and cars． ELSA Speak Type：Education ELSA Speak uses AI to help users perfect their English speaking skills．With speech data and voice recognition technology，the app is able to listen to a user's accent and applies a color-coded system of red，yellow and green to identify how close the user pronounced certain words，as well as provide tips for how the user can improve． 【语篇解读】　本文是一篇应用文。文章主要介绍了几款利用人工智能技术的应用程序及其功能。 1．Which app can help perfect the meeting minutes? A．Google Assistant．　 B．ELSA Speak． C．Otter．ai． D．Lensa． C　[推理判断题。根据文章Otter．ai部分中“Available both online and as a mobile app，Otter．ai offers a wide range of services，including the ability to record Zoom and Google video conferences，as well as phone calls．It uses artificial intelligence to automatically transcribe those recordings，breaking them down by speaker．”可知，Otter．ai可以帮助完善会议纪要。故选C。] 2．What do we know about the Google Assistant? A．It allows users to edit their selfies． B．It functions as a gaming companion． C．It helps users with their spoken English． D．It contributes to making a home smarter． D　[细节理解题。根据文章Google Assistant部分中“Google Assistant is one of the most advanced virtual assistants of its kind on the market...The app is compatible with an entire suite of smart devices，including refrigerators，lights and cars．”可知，Google Assistant有助于让家庭更智能。故选D。] 3．What do the four apps have in common? A．They all focus on providing social media services． B．They all employ artificial intelligence technology． C．They all require a high-end smartphone to operate． D．They all offer free trials for a limited period of time． B　[细节理解题。通读全文，尤其是由文章第一段和文章中关于四个应用的描述可知，这四个应用的共同点是它们都采用了人工智能技术。Lensa使用神经网络、计算机视觉和深度学习技术；Otter．ai使用人工智能自动转录音频；Google Assistant使用自然语言处理技术；ELSA Speak使用语音识别技术。故选B。] B Two months ago Daisy Greenwell and Clare Fernyhough set up a WhatsApp group to discuss how to delay their young children's demands for smartphones．After they posted about their plans on Instagram，other parents wanted in．Now their group，Smartphone-Free Childhood，has more than 60，000 followers debating how to keep their children away from the demon devices—a debate they are naturally conducting on smartphones of their own． This group，based in Britain，is not the only one worried about children's screen time．Last month the state of Florida passed a law banning social media for under-14s．Britain's government is reportedly considering a ban on mobile-phone sales to under-16s． The concerns are summed up by a recent book by Jonathan Haidt，The Anxious Generation，which argues that smartphones，and especially the social networks accessed through them，are causing a dreadful “rewiring of childhood”． First，smartphones and social media have become a big part of childhood．By the age of 12 nearly every child has a phone，according to research in Britain．Once they get one，social media is how they spend most of their screen time．American teens spend nearly five hours a day on social apps，according to polls (民意调查) by Gallup．Second，most agree that in much of the rich world there has been a decline in mental health among the young．The share of American teenagers reporting at least one “major depressive episode”in the past year has increased by more than 150% since 2010． Are the phenomena linked? The timing is suggestive：mental health began to slide just as smartphones and social apps took off，in the 2010s．Some studies also suggest that children who spend more time on social media have poorer mental health than lighter users．But such correlations do not prove causation：it may be，for instance，that depressed，lonely children choose to spend more time doom-scrolling than happy ones do． 【语篇解读】　本文是一篇说明文。文章介绍了儿童使用智能手机和社交媒体的问题及其对心理健康的影响。 4．Which aspect does the WhatsApp group focus on? A．Debate on smartphones' function． B．Ways to quit using smartphones． C．Plans to attract more worried parents． D．Methods to rid kids of smartphones． D　[细节理解题。根据文章第一段中的“Two months ago Daisy Greenwell and Clare Fernyhough set up a WhatsApp group to discuss how to delay their young children's demands for smartphones．”可知，该小组关注的重点是找到儿童摆脱使用智能手机的方法。故选D。] 5．Why does the author mention Jonathan Haidt's book in paragraph 3? A．To show Haidt's concerns for smartphones． B．To stress the importance of one's childhood． C．To indicate the negative impact of smartphones． D．To support the policies on social media and mobile phones． C　[推理判断题。根据文章第三段“The concerns are summed up by a recent book by Jonathan Haidt，The Anxious Generation，which argues that smartphones，and especially the social networks accessed through them，are causing a dreadful ‘rewiring of childhood’．”可知，提到这本书是为了表明智能手机的负面影响。故选C。] 6．What can be learned from the passage? A．Britain's government is considering a ban to limit mobile-phone sales． B．Social network companies are responsible for teenagers' mental decline． C．Children's mental depression may be closely related to smartphones． D．Children spending more time on social media tend to be unhealthier． C　[推理判断题。根据文章最后一段中的“Some studies also suggest that children who spend more time on social media have poorer mental health than lighter users．”可知，儿童的心理抑郁可能与智能手机密切相关。故选C。] 7．What can be a suitable title for this text? A．Concerns over Teenagers' Use of Smartphones B．Smartphone Addiction：It Is Killing Our Next Generation C．The Rise of Smartphone-Free Movement D．Keep Away from Smartphones and Social Media B　[标题归纳题。通读全文，尤其结合第一段中“Now their group，Smartphone-Free Childhood，has more than 60，000 followers debating how to keep their children away from the demon devices”及最后一段中“Some studies also suggest that children who spend more time on social media have poorer mental health than lighter users．”可知，文章介绍了儿童使用屏幕时间增加的现象，特别是智能手机和社交媒体对儿童的危害。故“智能手机成瘾：它正在杀死我们的下一代”是文章最佳标题。故选B。] Ⅱ．阅读七选五(共5小题；每小题2.5分，满分12.5分) Most teens can't wait to become adults，free to make their own decisions．But with freedom comes responsibility，and this applies especially to your finances．The earlier you begin developing good financial habits，the more secure your future will be． 1 Educate Yourself To take charge of your financial future，read a few basic books on personal finance． 2 And you will find it easier to say “no”to a friend who encourages you to waste money or classmates who plan expensive trips that you can't afford． Plan Your Spending 3 First，never spend more money than you can get，and second，watch where your money goes．The best way to do this is by creating a personal spending plan to track the money coming in and going out． Postpone Satisfaction 4 However，you'd better prevent yourself from doing so．With more money saved，you can buy something even better．So whether you received money from a part-time job or special occasions like Chinese New Year，it is wise to hang on to your money so that you can enjoy a greater satisfaction later on． Start an Emergency Fund To get ready for independence，you'd better save money for emergencies．So why not stick to a wise spending plan and put some money into this fund every month? 5 5 It will also give you a sense of safety and enable you to sleep better at night． Managing money is a skill that takes time to develop．If you can form the habits of self-educating，planning and saving，you'll be on your way to a solid financial future． A．There are two golden rules for you to follow． B．Waiting to get what you want is called postponed satisfaction． C．The best way to monitor your spending is to open a bank account． D．Here are some habits that can help set you up for financial success． E．This simple action will help you get out of unexpected financial problems． F．Many teens rush to buy their favourite items as soon as they get some money． G．Once you have learned enough knowledge，you won't be easily misled by others． 【语篇解读】　本文是一篇说明文。文章主要讲的是青少年如何养成良好的理财习惯，让未来更有保障。 1．D　[根据上文“The earlier you begin developing good financial habits，the more secure your future will be．”可知，养成良好的理财习惯很重要，根据下文每一段的小标题可知，下文是给出的一些建议，因此D选项承上启下，符合语境。故选D。] 2．G　[根据上文“To take charge of your financial future，read a few basic books on personal finance．”及下文“And you will find it easier to say ‘no’ to a friend who encourages you to waste money or classmates who plan expensive trips that you can't afford．”说明读书所带来的好处，空处也应该讲读理财的书籍的好处。因此G选项承上启下，符合语境。故选G。] 3．A　[根据下文“First，never spend more money than you can get，and second，watch where your money goes．”可知，有两条原则要遵守，A选项引起下文，符合语境。故选A。] 4．F　[根据下文“However，you'd better prevent yourself from doing so...it is wise to hang on to your money so that you can enjoy a greater satisfaction later on．”可知，作者建议不要急于在有钱后就花了，空格处应该引出青少年急于花掉钱这个问题，F选项引起下文，符合语境。故选F。] 5．E　[根据上文“So why not stick to a wise spending plan and put some money into this fund every month？”和下文“It will also give you a sense of safety and enable you to sleep better at night．”可知，坚持一个明智的支出计划，每个月都存一些钱到这个基金里的好处，E选项承上启下，符合语境。故选E。] Ⅲ．语法填空(共10小题；每小题1.5分，满分15分) Social Media Detox Today marks the last day of the Social Media Detox，which is 1．________ fundraising campaign for new sports equipment．At first，over 100 students 2．___________ (persuade) to stop 3．__________ (use) social media，in ANY form，for seven days．Now，with the detox 4．___________ (finish)，they've switched on their devices and they are back online．In the campaign，some students，who found the detox was difficult to tolerate threw in the towel halfway，while others managed the whole week．Faced with the challenge，they found new 5．__________ (way) to communicate with each other．And now they believe even if social media aren't 6．__________ (access)，they still can enjoy a colourful life． In my opinion，7．___________ has been raised through the detox is not only money，but also the 8．___________ (aware) of how much we rely 9．_____________ social media．Now it's time for us 10．____________ (step) away from it and live a more meaningful life． 【语篇解读】　本文是一篇说明文。文章主要讲述了社交媒体脱瘾的具体活动。 1．a　[考查冠词。此处泛指“一个活动”，且fundraising的发音以辅音音素开头，用不定冠词a修饰。故填a。] 2．had been persuaded　[考查动词时态和语态。分析句子结构及语境可知，应用过去完成时态，persuade和主语之间是被动关系，所以用被动语态。故填had been persuaded。] 3．using　[考查非谓语动词。stop doing sth．“停止做某事”，用动词-ing形式作宾语。故填using。] 4．finished　[考查非谓语动词。此处是with复合结构，with的宾语the detox和finish之间是被动关系，所以用过去分词作宾语补足语。故填finished。] 5．ways　[考查名词复数。way是可数名词，作宾语，前面没有表示数量的限定词，此处表示“不止一种方法”，用复数形式。故填ways。] 6．accessible　[考查形容词。分析句子结构可知，作表语，所以用形容词。故填accessible。] 7．what　[考查主语从句。分析句子结构可知，引导主语从句且在从句中作主语，指“……的事物”。故填what。] 8．awareness　[考查名词。和前面的money一样作表语，前面有定冠词，所以用名词，表示抽象概念，为不可数名词。故填awareness。] 9．on/upon　[考查介词。rely on/upon“依靠”固定短语。故填on/upon。] 10．to step　[考查非谓语动词。It is time for sb．to do sth．是固定句型，表示“到了某人做某事的时间了”。故填to step。] 1 / 15 学科网（北京）股份有限公司 $