Unit 5 A delicate world（复习课件）英语外研版选择性必修第二册

该高中英语单元复习课件系统梳理了外研版选择性必修第二册Unit 5“A delicate world”的重点词汇、短语、句型、语法及主题写作，通过知识图谱将核心单词分类、词形转换与词汇精讲结合、语法分模块解析，构建完整的单元知识网络，体现知识点间的内在逻辑联系。 其亮点在于采用“考点串讲-语法专项-主题写作-综合训练”四维复习策略，如词汇精讲结合情景导学和即时训练提升语言能力，语法部分通过结构详解和即时训练培养思维品质，主题写作提供模板和范文助力学习能力。分层设计让学生巩固知识，教师教学更具针对性。

外研版·选择性必修第二册 Unit 5 A delicate world 单元复习 Unit 5 A delicate world 复习目标 知识图谱 考点串讲 单元语法 主题写作 综合训练 复习目标 知识图谱 考点串讲 单元语法 主题写作 综合训练 CONTNETS 1.学生能够掌握本单元重点词汇，如 heritage, appetite, multiply, vegetation, erosion, conservation, decrease, visual, mysterious, status, criterion, rare, biological, vast, altitude, endangered, secure 等，并能在不同语境中正确运用。（重点掌握） 2.学会重要短语和句型，如 turn out, once and for all, owe it to sb to do sth, coexist with, in return等，并能利用这些短语和句型进行口头和书面表达。（重点掌握） 3.提高阅读理解能力，能够读懂关于生态系统保护与人与自然和谐共处主题的语篇（包括现象说明文、演讲稿等），能根据文章内容进行推理判断。 4.培养书面表达能力，能够运用所学词汇、短语和句型，写一篇演讲稿，介绍一处自然遗产或保护区，做到语言表达准确、条理清晰、内容完整。 复习目标 知识图 A delicate world 重点单词 heritage 遗产；传统 appetite 胃口，食欲 chaos 大混乱，紊乱 decrease 减少 immunity 免疫力 explode 突然增加 collapse 倒塌 substantial 大量的，多intervention 干预，介入 endangered 濒临灭绝的 coexist 共存，共处 secure 稳固的；安全的 重点短语 fail to do sth 未能做某事 in harmony with 与……协调；与……和睦 develop an appetite for 对……产生食欲 be introduced to 被引进 out of control 失去控制 turn out 原来是，结果是 once and for all 最终地，彻底地 owe it to sb to do sth 应该为某人做某事 单元语法 it作形式宾语（It as an empty object） 主题写作 起草演讲稿（Drafting a lecture）—介绍某一世界遗产 CONTNETS Unit 5 A delicate world 考点串讲 外研版·选择性必修第二册 考点串讲 重点词汇 单词 词形 意思 adj. 中间的，半途的 adv. 显著地 n. 栖居的动物 n. 栖息地 adv. 后来，随后 n. 胃口，食欲 n. 侵蚀 n. 大混乱，紊乱 n. 保护 v. （使）变小，（使）减少 halfway dramatically inhabitant habitat subsequently appetite erosion chaos conservation decrease 考点串讲 重点词汇 单词 词形 意思 n. 夹子，陷阱 n. 离开 n. 免疫力 v. 突然增加 v. 倒坍；塌下 n. 事件 n. 干预，介入 n. 生态 v. （使）溶解 adj. 神秘的 trap departure immunity explode collapse incident intervention ecology dissolve mysterious 考点串讲 重点词汇 单词 词形 意思 n. 标准，准则 v. 兴旺，发达 adj. 稀有的，罕见的 adj. 生物的，与生物有关的 adj. 巨大的；广大的 n. 差异，变化 adj. 花的 adj. 濒临灭绝的 n. 涌入 v. 共存，共处 criterion prosper rare biological vast variation floral endangered invasion coexist 考点串讲 词形转换 1. dramatically adv. 显著地；戏剧性地 → dramatic adj. 戏剧性的；突然的 → drama n. 戏剧 2. subsequently adv. 后来，随后 → subsequent adj. 随后的 3. conservation n. 保护 → conserve vt. 保护，保存 4. intervention n. 干预，介入 → intervene v. 出面，介入 5. comparison n. 比较 → compare v. 比较，对比 6. mysterious adj. 神秘的 → mystery n. 神秘之事；神秘 7. rare adj. 稀有的，罕见的 → rarely adv. 难得，罕见地 考点串讲 词形转换 8. apparently adv. 据说；看来，似乎 → apparent adj. 显然的，表面上的 9. greeting n. 问候，招呼 → greet vt. 欢迎，迎接 10. invasion n. 涌入；侵略 → invade vt. 侵略；涌入 → invader n. 侵略者 11. secure adj. 稳固的；安全的 → security n. 安全，安全性；保证 12. endangered adj. 濒临灭绝的 → endanger vt. 危及，使遭危险 → danger n. 危险，风险 → dangerous adj. 危险的，有威胁的 考点串讲 词汇精讲 1. appetite n. 胃口，食欲；强烈欲望 情景导学 Unfortunately, the cats subsequently developed an appetite for the birds, too. 不幸的是，猫后来也对鸟类产生了食欲。 用法归纳 develop an appetite for 对……产生食欲/兴趣 have an appetite for 对……有兴趣/欲望 have no appetite for 对……没有兴趣/欲望 spoil one’s appetite 影响某人的胃口 lose one’s appetite 某人没了食欲 知识拓展 appetizing adj. 开胃的；引起食欲的 即时训练 If you eat a lot of chocolate before supper, it will spoil your _____________ (appetizing). appetite 考点串讲 词汇精讲 2. out of control 失去控制 情景导学 Even after Macquarie Island became an official nature reserve in the 1970s, the rabbits remained out of control. 甚至在20世纪70年代麦夸里岛成为官方自然保护区后，兔子仍然不受控制。 用法归纳 out of control 失去控制，无法管理 get out of control 摆脱控制；无法管理 be in control (of) 掌管；管理；控制 be in the control (of) 被控制 be under control 被控制住；处于控制之下 bring/get/keep sth. under control 控制；抑制 lose control (of) 失去（对……的）控制 take control (of) 掌控 即时训练 The children are completely _____________ control since their father left. out of 考点串讲 词汇精讲 3. decrease v. （使）减少；（使）变小 n. 减少；降低 情景导学 But although the virus caused the rabbit population to decrease from 130,000 to around 10,000, it also meant less food for the cats. 然而，虽然病毒使得兔子的数量从130 000只减少到约10 000只，但这也意味着猫的食物变少了。 用法归纳 decrease (from sth.) to sth. （从…… ）减少到…… decrease by sth. 降低了…… decrease in sth. 在……方面减少 a decrease in 在……方面的减少 on the decrease 在减少 即时训练 There was some decrease _____________ military spending last year. in 考点串讲 词汇精讲 4. trap v. 使困住；诱捕 n. 圈套；陷阱；夹子 情景导学 In the 1980s, traps and dogs were used to catch the cats. 20世纪80年代，人们利用捕猎夹和狗来抓猫。 用法归纳 be/get trapped in 被困在……中 trap sb. into doing sth. 陷害/诱骗某人做某事 fall into the trap of doing sth. 掉进……的陷阱 fall into a trap 落入圈套 get out of a trap 摆脱圈套 set/lay a trap for 为……设圈套 即时训练 He is trying to decide whether the invitation was some sort of _____________ trap. a 考点串讲 词汇精讲 5. turn out 结果是；证明是 情景导学 It turned out that they developed an immunity to the virus, and their numbers exploded once again. 它们最终对病毒产生了免疫，数量又一次激增。 用法归纳 turn out (to be) + adj./n. 结果是；证明是 It turns/turned out that... 结果是…… 知识拓展 turn up 出现；开大 turn in 转身进入；交出 turn to （向某人）求助；翻到 turn over 翻转；反复考虑 即时训练 Sometimes things don’t turn out the way we think they're going _____________ (be). to be 考点串讲 词汇精讲 6. owe v. 应该做；对……负有义务；欠债；归功于 情景导学 ... but we humans owe it to the island to give it a happy ending. ……但我们人类有义务给这个岛一个幸福的结局。 用法归纳 owe sth. to sb. (= owe sb. sth.) 把……归功于某人；欠某人…… owe it to sb. to do sth. （为了感谢某人）应该做…… ，有义务做…… owe sb. an apology 该向某人道歉 知识拓展 owing to 由于 即时训练 The country owes billions of dollars _____________ foreign creditors. to 考点串讲 句型精讲 Nor would they fail to imagine how its native inhabitants, including royal penguins, king penguins, and elephant seals, existed in perfect harmony with their natural habitat for thousands of years. Sentence 1 主句 nor置于句首时，句子用部分倒装（助动词/情态动词提到主语前），表示“……也不”。 现在分词短语作插入语，对 inhabitants 进行举例补充说明 译文：他们也不难想象出，数千年来，包括帝企鹅、王企鹅和象海豹在内的当地动物是如何与其自然栖息地完美地和谐共存的。 即时训练 He never went there again, nor _____________ (do) he write to apologize. did how 引导宾语从句 and 连接三个并列的名词 考点串讲 句型精讲 Loose on the island, they did what rabbits do best – they multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion. Sentence 2 句子的主干，主语 they + 谓语 did + 宾语从句 what rabbits do best 译文：由于在岛上不受束缚，它们做了兔子最擅长的事——它们迅速繁殖，开始吃当地的植被并挖洞，这导致了土壤侵蚀。 即时训练 ______ (tire) after the long journey, they decided to take a rest. She stood there, __________ (speechless) and __________ (shock), unable to say a word. Tired speechless what 引导的宾语从句，作 did 的宾语，意为“兔子最擅长做的事” 破折号表示对前面 what rabbits do best 的具体解释说明 并列谓语1 并列谓语2 which 引导非限制性定语从句，指代前面整个这件事 shocked Unit 5 A delicate world 单元语法 外研版·选择性必修第二册 单元语法 it作形式宾语（一） 在英语中，有时候句子的宾语比较复杂，很容易引起歧义。因此，为了平衡句子结构，避免误解，习惯上使用一个没有具体意义的代词 it 来作形式宾语，而将真正的宾语放在后面。 (1) it后接宾语补足语：动词 + it + 宾语补足语 + 真正的宾语 即时训练 1. I found it important _________(learn) spoken English. 2. I did consider it no use __________(report) the incident. to learn reporting 单元语法 it作形式宾语（二） 1. 动词 + it + 宾语补足语 + 不定式 I found it important to learn spoken English. 我发现学习英语口语很重要。 2. 动词 + it + 宾语补足语 + 动名词 I did consider it no use reporting the incident. 我确实认为报道这件事没有用。 3. 动词 + it + 宾语补足语 + 从句 I think it necessary that you study hard. 我认为你努力学习是必要的。 单元语法 结构详解 即时训练 1. 他已养成早起的习惯。 He has _______________________ early. 2. 我觉得每天大声读英语真的很有用。 I ____________________________ yell English every day. 3. 我想说清楚我并没有偷他的钢笔。 I want to _______________________ I didn’t steal his pen. 4. 我发现建议他戒烟是没有用的。 I ______________________ him to give up smoking. made it a rule to get up find it really helpful to make it clear that find it no use advising 单元语法 it作形式宾语（三） 1. 动词 + it + that从句 常见动词：have, take, put, like 等 Rumor has it that the defence minister will soon resign. 据传闻，国防部长不久就要辞职。 2. 动词 + it + when/if从句 常见动词：enjoy, hate, love, like, dislike, appreciate, prefer 等 I dislike it when you whistle. 我不爱听你吹口哨。 单元语法 it作形式宾语（四） 3. 动词 + 介词 + it + that从句 常见动词：see to, look to, insist on, stick to, depend on, rely on, answer for 等 See to it that you’re not late again. 务必不要再迟到。 4. 动词 + it + 介词短语 + that从句 常见结构：take it for granted, bring it to one’s attention, owe it to sb. 等 I took it for granted that he would help us. 我理所当然地认为他会帮助我们。 单元语法 it作形式宾语（四） 即时训练 1. 我希望我不必做那么多工作。 I’d _____________ I didn't have to do so much work. 2.我不能保证他会来。 I can’t ________________ he will come. 3. 你放心，他会来接你的。 You may _____________ he’ll come to meet you. prefer it if answer for it that rely on it that 单元语法 it作形式宾语 即时训练 New technologies have made _____ easier to enjoy life than ever before. You may depend on it _______ they will look after your daughter when you are away. I don’t enjoy it in the summer ________ it rains on end. Sorry! I just took _____ for granted that you'd want to come. I would appreciate it very much _____ you could give me some suggestions. Will you see to _____ that my children are taken good care of while I am away? He disliked ____ when she behaved badly in front of his mother. First of all, I think it very important ________ (make) more friends abroad. I find it necessary ________ we should spend more time practising spoken English. I think it no use ________ (argue) with him. it that when it if it it to take that arguing Unit 5 A delicate world 主题写作 外研版·选择性必修第二册 主题写作 主题解读 本单元的写作项目是起草一份关于“世界遗产名录”中某一世界遗产介绍的演讲稿，属于应用文写作范畴。 此类演讲稿主要介绍这一世界遗产的基本信息，包括其特点、特色及其入选“世界遗产名录”的原因等。 主题写作 写作要点 开头段（主题介绍） 整体介绍其地理位置或人文环境，引出演讲主题。 主体段（原因分析） 具体介绍其独特的历史价值或突出的人文/自然特色，分析入选原因。 结尾段（概括总结） 总结概括，吸引听众前往或呼吁大家保护。 主题写作 写作结构 世界遗产 开头段 中间段 结尾段 整体介绍其地理位置或人文环境 Where is it? What is its basic information? 分析入选原因 Why was it selected? What are its unique features? What makes it special? 总结呼吁 Summarize the main points Call for action or express expectation 主题写作 写作素材 1.常用词块 result in 导致 let alone 更不用说 arouse one’s interests 引起某人的兴趣 play an important part in 起重要作用 in conclusion 总之 account for the reason 解释原因 rely on vegetation 依赖植被 be responsible for 对……负责 主题写作 写作素材 1.常用词块 plant species 植物物种 climate change 气候变化 damage their habitat 破坏它们的栖息地 the main reason for... is... ……的主要原因是…… be added to... 被列入…… biological diversity 生物多样性 national nature reserves 国家自然保护区 be renowned for 以……闻名 主题写作 写作素材 2.精彩开头 （1）Good morning, everyone. It is my great pleasure to give a lecture on behalf of... 大家早上好！我很高兴代表……做这次演讲。 （2） It is a great honor for me to give my speech here. 我很荣幸在这里发表演讲。 （3） Welcome to our school. Now please allow me to introduce you to... 欢迎来到我们学校。现在请允许我把你介绍给…… （4） The topic of my speech today is “...”. 我今天演讲的题目是“……”。 （5） Today I will talk about...今天我要谈谈…… 主题写作 写作素材 3.丰满主体 （1）A report made recently suggests that... 最近的一份报告表明…… （2） The main reason for its inclusion is... 它被列入的主要原因是…… （3）... represents one of the country’s greatest achievements in... ……代表着该国在……方面最伟大的成就之一。 （4） It is also renowned for... 它还以……而闻名。 主题写作 写作素材 4.余味结尾 （1）In my opinion, when in trouble we’d better... 在我看来，遇到困难时，我们最好…… （2） In conclusion, ... 总之…… （3） Please take action right now! Only by... can we... 请立刻采取行动！只有通过……我们才能…… （4） That’s all. Thanks for your listening! 我的演讲到此结束。感谢聆听！ 主题写作 写作模板 第一段：问候与引入（主题介绍） Good morning/afternoon, everyone! I’m very happy to be here to give a short lecture. Have you ever heard of _____________? Or have you ever visited it? If you haven’t, you soon will! _____________ lies in _____________（地理位置）. It is _____________（基本概况）. 第二段：主体（原因分析） _____________ was added to the UNESCO World Heritage List in _____________（入选时间）. The main reason for its inclusion is _____________（入选原因）. The region is home to _____________（特色资源/物种）. _____________ can also be found here. 第三段：结尾（总结概括） _____________ is also renowned for _____________（其他特色）. All this explains why _____________ earned its place on the UNESCO World Heritage List. Thank you for your listening! Now, does anyone have any questions? 主题写作 写作练习 你校将举办以“中国的世界遗产”为主题的英语演讲比赛。请你根据以下提示，写一篇介绍梵净山的演讲稿，内容包括： （1）地理位置和基本概况； （2）入选世界遗产名录的原因； （3）其他特色信息。 注意： （1）词数100左右； （2）开头和结尾已给出，不计入总词数。 Good afternoon, everyone! I’m very happy to be here to give a short lecture. 主题写作 写作范文 The Wonders of Fanjing Mountain Good afternoon, everyone! I’m very happy to be here to give a short lecture. Have you ever heard of Fanjing Mountain? If you haven’t, you soon will! Fanjing Mountain lies in Tongren, Guizhou Province with an elevation of about 2,570 metres. It is the highest peak of the Wuling Mountain range in south-west China. The Fanjingshan Nature Reserve was established in 1978 and represents one of the country’s greatest achievements in environmental protection. The rich biodiversity of the Wuling Mountain range is the principal reason for Fanjing Mountain’s inclusion in the UNESCO World Heritage List. Comprising the largest subtropical primeval beech forest, the region is home to 2,000 species of plants, such as the endangered Chinese dove tree. Endangered animal species that can be found on Fanjing Mountain include the Chinese giant salamander, forest musk deer and grey snub-nosed monkey. Fanjing Mountain is of course also renowned for the breathtaking views from its summit. All this explains why Fanjing Mountain earned its place on the UNESCO World Heritage List. Thank you for your listening! Now, does anyone have any questions? Unit 5 A delicate world 综合训练 外研版·选择性必修第二册 综合训练 一、单词拼写（根据句意及汉语提示写出单词）。 1. We stopped for a rest at the __________ (半路的) point of our hike. 2. The hot weather has ruined my __________ (食欲) and I don't feel like eating. 3. The __________ (出发) time of the flight has been delayed by two hours. 4. Stir the sugar in the water until it completely __________ (溶解). 5. This cereal is rich in vitamins and other essential __________ (营养物质). 6. She received a __________ (神秘的) letter with no return address on it. 7. The local economy continues to __________ (繁荣) thanks to the new factory. 8. Many rare species are now __________ (濒危的) due to habitat loss. 9. Fasten your seatbelt to __________ (确保) your safety during the flight. 10. The Norman __________ (入侵) of England took place in 1066. halfway departure dissolved mysterious nutrients prosper endangered secure appetite invasion 综合训练 二、单句语法填空 1. The cost of living has increased ____________ (drama) over the past five years. 2. He failed his driving test and ____________ (subsequent) decided to take the bus instead. 3. The ____________ (conserve) of natural resources is essential for sustainable development. 4. Please ensure that your personal belongings are __________ (security) stored. 5. In __________ (compare) with other cities, London is extremely expensive. 6. The old house at the end of the street has a __________ (mystery) atmosphere at night. 7. The __________ (invade) of foreign tourists has changed the small town completely. 8. __________ (apparent), he had no idea what had happened to his luggage. 9. She gave me a warm __________ (greet) when I arrived at the airport. dramatically subsequently conservation securely comparison mysterious invasion Apparently greeting 综合训练 三、完成句子 1. He didn't apologize for his mistake, ________________（也没有解释）why he had done it. 2. During his year abroad, he ______________________（对……产生了兴趣）local cuisine and even learned to cook some traditional dishes. 3. The old man sat on the bench, ________________（疲惫而孤独）, watching the children play in the park. 4. The heavy rain destroyed many crops, which __________（结果/相应地）led to a sharp rise in food prices. 5. The detective examined the room carefully to find ________________（每一个细节）that might help solve the case. nor did he explain developed an interest in tired and lonely in turn every last detail 综合训练 四、语篇语法填空 Archaeologists have identified residues(残留物) of a 2,300-year-old grain-based alcoholic drink from the Warring States Period (475BC-221BC) in northwest China's Ningxia Hui Autonomous Region, offering new insights __________ ancient Chinese brewing(酿酒) technology. The discovery __________(make) at the Shanjiabao cemetery of the Qin State in Guyuan, __________ researchers found liquid preserved inside a bronze garlic-head-shaped pot. Through a combination of archaeological research and advanced scientific analysis, researchers confirmed that the 3,740 ml of liquid extracted from the vessel(器皿) was a grain-based alcoholic beverage(饮料) __________(date) back to the Warring States Period. into was made where dating 综合训练 四、语篇语法填空 The bronze pot adopted a dual sealing structure lined with textile fabrics __________ coated with organic mud. The complicated sealing isolated external contaminants, allowing the ancient liquor __________(survive) with minimal volatilization(挥发) for over 2000 years. A joint team consisting of researchers from two institutions carried out __________(detail) tests. The analysis identified 24 categories of compounds, including organic acids and amino acids. __________(far) examination showed Qin people had mastered fermentation (发酵) skills, making __________ possible to complete saccharification(糖化) and fermentation at the same time. The findings indicate that Qin people possessed advanced brewing skills at that time. This discovery provides valuable physical __________ (evident) to support studies on ancient Chinese fermentation technology. and to survive detailed Further it evidence 外研版·选择性必修第二册 感谢聆听 $