Unit 6 Earth First Developing ideas What’ s really green课文讲解课件-2025-2026学年高中英语外研版必修第二册

该高中英语课件围绕“环保常见误区及科学认知”核心主题，通过视频观看（Watch and think）、Pre-reading选择题互动导入，结合子标题预测、文本真假判断及原因-影响-措施分析搭建学习支架，衔接语言点学习与Post-reading实践应用，形成完整认知链条。 其亮点在于融合语言能力、思维品质与学习能力培养，视频导入激活兴趣，对比分析（如纸质袋与塑料袋能耗数据）和强调句等语法点提升语言运用，“真假判断”“原因-影响-措施”分析培养批判性思维，任务式活动（补全原因、写演讲稿）促进主动学习。学生能提升环保意识与语言能力，教师可借助完整流程和多样化活动优化教学。

Book2 Unit 6 developing ideas What's really green? 01. Lead in Watch and think What is the clip mainly about? In your opinion, which lines impress you most? Warming up 02. Pre-reading Look at the questions about “green living” and tick your answers. 视情况而定 Pre-reading What’s the meaning of “green” in the title? environmentally friendly Look at the title, subheadings and illustrations and catch the main idea. Paper shopping bags are better than plastic ones? When you turn off a device, it stops using power? Eating local food is good for the environment? It’s better to take a shower than a bath? What’s the function of the sentences in red? subheadings/subtitles 03. While-reading Read the four subheadings in the passage and decide if they are true or false. Fast reading 1.What’s the main idea of the passage? It discusses some common __________ which have been shown to be only _________ or even ______________. green truth half true completely false 1Most of us are aware that we must take care of the environment, and the majority of us take steps to save energy and reduce waste and pollution. But recently, some “green truths” have been shown to be only half true, or even completely false. Here are some common ones. Which are really green? take steps/measures to do sth.采取措施做某事 多数 adv.完全地 be aware that＋从句 意识到 adj.常见的 look after 照顾；照料 我们大部分人都意识到要保护环境,也采取了各种行动节约能源,减少浪费和污染。但是近来,一些“绿色环保真相”被证实并非完全正确,甚至是无稽之谈。下面列举了一些常见的环保观念,其中哪些是正确的呢? Language points Most of us are aware that we must take care of the environment，and the majority of us take steps to save energy and reduce waste and pollution. 我们大多数人都知道，我们必须保护环境，我们大多数人都采取措施，以节省能源，减少浪费和污染。 major adj.&n.较大的；主要的；主修，专攻 a/the majority of... ……大多数 in the majority占大多数 ►单句语法填空 ① The majority of the work (be) done. ②Among the members of the committee those who favour the changes are ___________ the majority. ③The majority of students in favour of his proposal. has been in are Language points Most of us are aware that we must take care of the environment，and the majority of us take steps to save energy and reduce waste and pollution. 我们大多数人都知道，我们必须保护环境，大多数人都采取措施，以节省能源，减少浪费和污染。 take measures/steps/action to do sth 采取措施做某事 step by step 逐渐地，一步一步地 ►单句语法填空 ①We must take ________ (step) to help the families of those who were hurt. ②Our listening ability needs improving step _____ step. ►一句多译 ③是时候我们应该采取措施阻止空气被污染了。 It’s high time that we ____________________ to keep the air from being polluted. →It’s high time that we ________________ to prevent the air from being polluted. →It’s time for us to ________________ to stop the air from being polluted. steps by should take measures took action take steps Paper shopping bags are better than plastic ones. Causes Effects Measures true or false Making a paper bag uses . It also produces . more energy and water more greenhouse gases Paper bags are for the environment. not good Take a when going shopping reusable bag false suggestion: Take a reusable bag with you when you go shopping. 纸质购物袋优于塑料袋? 塑料袋会变成垃圾,被野生动物误食后会对其造成伤害。塑料需要数百年才能降解,而纸的降解时间要短得多,因此人们认为纸袋是更为环保的选择。 然而,生产纸袋的耗能为塑料袋的四倍,耗水则多达三倍。其生产过程也会产生更多的温室气体。 事实上,这两种袋子都不够环保,所以出门购物时请带一个能重复利用的袋子。 What else can be reused in our daily life? shopping bag thermos reusable bottles meal box 消除,破除(障碍/偏见);(机器)出故障;(情绪)垮掉,崩溃;(使)分解 Paper shopping bags are better than plastic ones. 2Plastic bags cause litter and are a danger to wild animals, which mistake them for food. It takes hundreds of years for plastic to break down, but much less time for paper. Because of this, people think paper bags are the better environmental choice. n.垃圾 对..是一种危险 把…错当成… It takes some time for sb./sth.to do sth. 做某事花费某人/物一些时间 非限定性定语从句，补充说明 wild animals 复习：四个“花费” take:主要用于描述做某事花费的时间常用结构为“It takes sb.+时间+to dosth.” spend:可用于描述花费时间或金钱，常用结构为“sb.spend+时间/金钱+on sth.或“sb.spend+时间/金钱+(in) doing sth. cost:常用于描述某物的价值或做某事所需的代价，常用结构为“sth cost sb.+金钱”。 pay:强调支付金钱的动作，常用于购买商品或服务时付款，常用结构为“sb.pay+金钱+ for sth.”。 3However, making a paper bag uses four times as much energy as making a plastic bag and up to three times the amount of water. The process also produces more greenhouse gases. 4In fact, both kinds of bags are bad for the environment. So, take a reusable bag with you when you go shopping. 多达 .....的数量 三倍 n.过程 对…有害 do harm to be harmful to 温室气体 引导时间状语从句 Language points However，making a paper bag uses four times as much energy as making a plastic bag and up to three times the amount of water. 然而，制造一个纸袋所需的能量是制造一个塑料袋的四倍，所消耗的水量是一个塑料袋的三倍还多。 a large/vast amount of 大量的 amounts of 大量的 the amount of ...……的数量 注意：(1)a large/small/huge amount of＋不可数名词(作主语时，谓语用单数形式) (2)large/vast amounts of＋不可数名词 (作主语，谓语用复数形式) ►单句语法填空 ①Because of ____________ large amount of mail we receive，we may not be able to reply to your letter. ②A large amount of money ________________ (be) spent on the bridge since last year. ③The amount of training you need ____________ (depend)very much on your goals. a has been depends Language points However，making a paper bag uses four times as much energy as making a plastic bag and up to three times the amount of water. 然而，制造一个纸袋所需的能量是制造一个塑料袋的四倍，所消耗的水量是一个塑料袋的三倍还多。 【分析】 four times as...as...为倍数表达方式；three times＋the amount of也是倍数表达方式。 【拓展】 (1)...times＋adj.\adv.比较级＋than... e.g. three times larger than... (2)...times＋as＋adj.\adv.原级＋as... e.g. three times as large as... (3)...times＋the＋名词(如： size，height，weight，length，width 等)＋of... e.g. three times the size of that baby (4)...times＋more＋名词＋than... e.g. There are six times more students in our class than in theirs. (5)...times＋as many (或 much )＋名词＋as...” e.g. three times as many students as.... 这棵树是那棵树的三倍高。 This tree is three times as tall as that one. This tree is three times three times taller than that one. This tree is three times the height of that one. 温馨提示： 表示“两倍”时用twice或double； 三倍或三倍以上用“基数词+times”表达。 单句语法填空 ①This bridge is three times the length 　　　　 that one.  ②My room is four times 　 　　　 (large) than yours.  ③His car is twice 　　　　 expensive as Mr Green’s.  of larger as When you turn off a device, it stops using power. Causes Effects Measures true or false Devices turned “off ” go into . and . Electricity from the device. stand-by mode still use power continues to leak Turning off a device . won’t stop it from using power from its power supply. Remove the plug false suggestion: Remove the plug from its power supply. 关掉的电器不耗电? 当我们关掉电视等电器时,它会进入待机状态。这种状态下的电器仍然耗电,而且越旧的电器耗电越多。这是因为电器即使已经被“关掉”了,却依然有电流从电器中流失。为确保电器设备彻底关闭,请从电源上拔下电器插头。 What can you learn from this “green truth”? What else can we do to save energy (electricity or water)? We need to remove our cellphone chargers from the power supply, and also unplug other home appliances, such as washing machine, television, reading lamp and so on. When you turn off a device, it stops using power. 5When we turn off a device, such as television, it goes into stand­by mode. Devices in this mode still use power, and older devices in stand­by mode can use even more. This happens because electricity continues to leak from the device, even when it is turned “off”. To make sure your appliance is in fact off, remove the plug from its power supply. 待机模式 家用电器 电力供应；电源供应 确保 从...泄露 remove...from... 把...从...中移走 Language points To make sure your appliance is in fact off，remove the plug from its power supply. 为了确保你的电器实际上是关闭的，从电源上拔下插头。 remove...from... 把……从……移开/撤掉 remove one’s doubt 消除某人的疑虑 ►单句语法填空 ①Of the three columns concerning health，entertainment and culture，my suggestion is that the column of entertainment ____________ (remove). ②The company has removed the manager _______ his post due to his poor performance. ►补全句子 ③Realizing her mom must be very tired after a day’s work，the little girl helps her to _______________________________. 意识到妈妈工作一天后肯定很累，小女孩帮助妈妈把包从肩上拿下来。 be removed from remove the bag from her shoulder Eating local food is good for the environment. Causes Effects Measures true or false It is , not its transport, that uses most of the energy and produces most of the greenhouse gases. the production of food Eating local food . for the environment. isn’t always better Eat . seasonal local food It depends suggestion: Take the transport into account. 吃本地食物更利于环保? 这似乎已是人们常识性的认识:吃本地产的食物更环保,因为不需要长途低温运输。然而事实并没有那么简单。相比于运输,食物的生产过程才是消耗大部分能源及产生大部分温室气体的原因。在有些情况下,即使将运输的因素考虑在内,本地的农产品也可能比距离遥远的外地种植的农产品耗能更多,产生的温室气体也更多。 Eating local food is good for the environment. 6It seems like common sense: eating local food should be better for the environment, because it does not need to be transported long distances and kept cold during transport. Unfortunately, it is not that simple. It is the production of food, not its transport, that uses most of the energy and produces most of the greenhouse gases. 常识 =be beneficial to sb./sth. need doing=need to be done 需要被做 n.距离 温室气体 n.生产过程,产量 it is\was＋被强调部分(主宾状)＋that\who＋其他成分 去掉it is\was和that\who，剩余部分如结构完整，则为强调句，否则就不是强调句。 In some cases, local produce might have used more energy and produced more greenhouse gases than produce grown a long way away—even taking into account its transport. 在某些情况下 本地的农产品 might have done 过去可能做了某事 take...into account\consideration 把…考虑进去 account for 解释，说明 过去分词作后置定语，修饰produce Language points in some cases 在某些情况下 (1)in that case 既然那样，如果那样的话 in no case 决不 in any case 无论如何，不管怎样 in most cases 在多数情况下 (2)in case (that)万一；假使 in case of 万一；如果发生；假设 ►用case相关短语填空 ①_____________(在某些情况下)noise pollution can actually help some animals while harming others. ②_____________(在大多数情况下)，these people simply do not enjoy the job they are doing. ③Meanwhile，my horse got frightened，jumped up，and ran around wildly.I held the rope tightly __________(以防) I might fall off. ④________________(无论如何都不) should you lend him any money. In some cases In most cases in case In no case Language points In some cases，local produce might have used more energy and produced more greenhouse gases than produce grown a long way away—even taking into account its transport. 在某些情况下，本地农产品可能比在很远的地方生产的农产品消耗更多的能源，产生更多的温室气体——甚至要考虑到其运输。 【分析】 情态动词“might＋have done”表示对过去的推测。 【拓展】 “情态动词＋have done”用法归纳 (1)should have done 过去本应该做(而实际上未做)； (2)shouldn’t have done 过去本不该做(而实际上做了)；两者都含有责备或后悔的口气。 (3)must have done (过去)一定做过 (4)could have done (过去)本能够做而未做；(过去)可能做过 (5)can’t/couldn’t have done (过去)不可能做过 (6)needn’t have done (过去)本没必要做而做了 Language points 单句语法填空 ①His room was dark last night.He ______________________ (go) to bed. ②You ___________________(write) down his telephone number yesterday，but you didn’t. ③You ____________________(go) without telling us.We were really concerned about you. ④It _________________(rain) last night，for the ground is wet. ⑤I ___________________(buy) so much wine—only five people came. might/may have gone should have written shouldn’t have gone must have rained needn’t have bought Language points In some cases，local produce might have used more energy and produced more greenhouse gases than produce grown a long way away—even taking into account its transport. 在某些情况下，本地农产品可能比在很远的地方生产的农产品消耗更多的能源，产生更多的温室气体——甚至要考虑到其运输。 take into account/consideration 考虑，体谅 take account of 考虑到 ►一句多译 做计划的时候，我们应该把每一件事情都考虑进去。 →_____________________________________________________________________ →_____________________________________________________________________ →_____________________________________________________________________ We should take everything into account/consideration when making a plan. We should take account of everything when making a plan. Everything should be taken into account when making a plan. Causes Effects Measures true or false spend more than eight minutes not always better as short as possible It depends If you in a shower, you’ll use as much water as in a bath. It’s better to take a shower than a bath. It’s to take a shower than a bath. It is to take a shower than a bath. suggestion: Keep your shower time as short as possible. 淋浴比泡澡更好? 这取决于你淋浴的时间和你的浴缸大小。如果淋浴超过八分钟,那么耗水量就和泡澡一样多——大约为五十升水。所以,节水的关键在于尽量缩短淋浴的时间。 It's better to take a shower than a bath. 7It depends on (how long you spend in the shower and how large your bath is). If you spend more than eight minutes in a shower, you’ll use as much water as in a bath—about 50 litres of water. Therefore, the key is to keep your shower time as short as possible. as...as possible尽可能... the key to doing sth. 做某事的关键 the answer/solution/approach to doing sth. 取决于= rely on 8Environmental awareness is now part of daily life. But it’s worth checking common ideas and opinions to see what’s really green. sth be worth doing值得做某事，主动表被动 环保意识 raise/arouse/strengthen one’s awareness of 提高/唤醒/增强某人对...的意识 引导宾语从句 Complete the causes of these according to the passage. 1. Making a paper bag uses more energy and water than making a plastic bag. It also produces more greenhouse gases. Paper bags are not good for the environment. Turning off a device won’ t stop it from using power. Eating local food isn’ t always better for the environment. It’s not always better to take a shower than a bath. 2. Devices turned off go into stand-by mode and still use power. 3. Local produce sometimes might use more energy and produce more greenhouse gases than produce grown a long way away-even taking into account its transport. 4. If you spend more than eight minutes in a shower, you'll use as much water as in a bath-about 50 litres of water. Conclusion Introduction Body green truth 1 green truth 2 green truth 3 green truth 4 Paper bags are not good for the environment. Turning off a device won’t stop it from using power. Eating local food isn’t better for environment. It’s not always better to take a shower than a bath. 04. Post-reading Think&share. What can you do to become “greener”? Buy second-hand products or borrow items instead of buying them new. Use public transportation to travel long distances. Walk or ride a bike to some places if you live close enough. 49 Use reusable bags while you’re shopping. Reduce the amount of time you spend using electronics(电子产品). Carry a reusable water bottle so you will not need bottled water. Think&share. What can you do to become “greener”? 50 Reuse items to save them from the landfill. Eat less meat because it takes more resources to raise. Line dry your clothing instead of using a dryer. Think&share. What can you do to become “greener”? 51 Cut down on your water use. Turn lights off when they aren’t in use Recycle paper, cardboard, plastic, glass, and metal cans. Think&share. What can you do to become “greener”? 52 Conclusion. 绿色生活 节约能源 关（电灯、机器等) 那得看情况。 洗澡/淋浴 知道/意识到/察觉到 大多数…… 采取措施 把……错当成…… 分解;打破;消除 green living save energy turn off lt / That (all) depends. take a bath / shower be aware that ... the majority of take steps / measures mistake ... for break down 温室气体 实际上 进入; 从事;撞在…上 待机模式 将…从…移走/清除 供电，电源 常识 在一些情况中 把……考虑进去 取决于;由……决定;依靠;依赖 greenhouse gases in fact go into stand-by mode remove ... from power supply common sense in some cases take ... into account depend on / upon 环保意识 值得做某事 详细地 鼓励某人做某事 呼吁/号召某人做某事 参与;参加 强烈要求/敦促某人做某事 剩下的食物 拯救某人/某物免于……. environmental awareness be worth doing sth in detail encourage sb to do sth call on sb to do sth take part in / participate in/join in urge sb to do sth leftover food save ... from Book2 Unit 6 Presenting ideas & Writing Language points It urges people to save food by not wasting anything on the dining table. 它敦促人们不要浪费餐桌上的任何东西来节省食物。 urgent adj.紧急的 urgency n.紧迫；急迫；急事 urge sb to do 敦促某人做某事 urge that...(should) do sth 极力主张；强调做某事 It is urged that...(should) do sth 坚决要求做某事 ►单句语法填空 ①Our teacher urges us ____________(study) hard with the College Entrance Examination drawing near. ②There is no sense of ____________(urge) to do my school work immediately. ③The report urged that all children ________________(teach) to swim. to study urgency be taught Language points We are concerned that... 我们担心…… concern v.涉及，与……有关； 使担心，使担忧 n.担心，忧虑，焦虑 as far as...be concerned 就……而言 be concerned with... 与……有关，涉及…… be concerned about/for 为……担心 ►单句语法填空/补全句子 ①The meeting was concerned ______ reforms and everyone present was concerned ___________ their own interests. ②________________________，you can forget about it. 依我看，你可以把这事忘了。 with for/about As far as I’m concerned Language points Look at the three items that contribute to a carbon footprint.Add any more you can think of. 看看有助于碳足迹的三个项目，再加上你能想到的东西。 contribution n.捐献；贡献；稿件 (1)contribute sth to...把某物捐献给…… contribute to 有助于；导致；投稿 (2)make a contribution /contributions to sth/ doing sth对……做出贡献 ►单句语法填空 ①Located where the Belt meets the Road，Jiangsu will contribute more ____ the Belt and Road construction. ②Eating too much fat ____________ (contribute) to heart disease and causes high blood pressure. ③Your ____________ (contribute) will certainly make the event a huge success. ④In conclusion，everyone should make contributions to ____________ (protect) the environment. ►同义句转换 ⑤He made such a great contribution to the university that the new library was named after him. →He ________________ the university so the new library was named after him. to contributes contribution protecting contributed to Language points The average score of our group is... 我们组的平均分数是…… the/an average of ...……的平均数 above/below average 在一般水准以上/下 up to(the)average 达到水准 ►补全句子 ①__________________________ are absent each day. 平均每天有10个学生缺席。 ②The amount of snow this year has been ________________. 今年的降雪量低于平均水平。 An average of 10 students below average 1. What does the passage talk about? 2. How does the author develop this text? Homework. write a persuasive letter. 假定你是高三学生李华，你校学生会计划发起 “校园低碳生活周” 活动。请你以学生会主席的身份，写一篇英语演讲稿，内容包括： 1.活动的目的(减少浪费、保护环境); 2.具体倡议:节约水电、减少使用一次性物品(一次性筷子、手套、塑料水瓶)、携带购物袋等、二手物品交换等; 3.呼吁大家积极参与。 注意：1.词数80左右; 1. What does the passage talk about? 2. How does the author develop this text? Smart expressions 学生会主席 the president of the Student Union “校园低碳生活周” 活动 “Low-carbon Life Week” activity 保护环境 protect the environment 呼吁某人做某事 call on sb to do sth\ appeal to sb to do sth 减少使用一次性物品 reduce the use of disposable items(such as disposable chopsticks\gloves, plastic water bottles) 二手物品交换 exchange used\second-hand products 1. What does the passage talk about? 2. How does the author develop this text? Dear fellow students, I’m Li Hua, the president of the Student Union. Our school is launching a “Low-carbon Life Week” activity, which aims to reduce waste and protect our environment. Here are some suggestions. First, save water and electricity. Don’t leave the tap running or forget to turn off lights or fans when we leave. Second, reduce the use of disposable items, such as disposable chopsticks or gloves, plastic water bottles, etc. Third, exchange second-hand items like fridges, washing machines to make good use of things we no longer need. Let’s actively participate in this activity. Every small step can pave the way for a greener campus. Lavf58.30.100 $