Unit 5 Working the Land（复习课件）英语人教版选择性必修第一册

该高中英语课件系统梳理了“Working the Land”单元的词汇、句型、语法及写作知识，通过主题图谱构建“危机-创新-选择”逻辑链，以词汇语义场（危机应对、科研突破等）和语法结构（主语从句连接词、语序等）为支点，串联单元核心知识，帮助学生建立完整的农业主题语言体系。 其亮点在于采用“图谱可视化-语境迁移-分层实践”策略，如词汇按语义场归类并设计中文提示快说英文互查活动，语法通过高考真题语境训练和语篇填空强化主语从句应用，写作结合单元主题设计“立场-理由-结论”三段式短文并提供语言支架，既培养学生的语言能力和思维品质，又通过分层练习满足不同水平需求，帮助学生系统巩固知识，也为教师提供清晰复习路径和可操作活动设计。

一粒种子改变世界：科技、粮食安全与土地责任 My lifelong pursuit is to keep all the people away from hunger. UNIT 5 Working the Land 选择性必修第一册 · 单元复习 词汇 · 句型 · 语法 · 写作 UNIT 5 Contents 单元复习路径 01 复习目标 02 知识图谱 03 词汇串讲 04 重点句型 05 单元语法 06 主题写作 UNIT 5 Review Objectives 复习目标：从科学家精神走向农业选择与观点表达 01 词汇与词组 掌握粮食危机、农业科研、产量提升和耕作方式相关词汇，并完成语境迁移。 02 句型与语法 归纳课文重点句型和主语从句规则，辨析连接词、语序、主谓一致与形式主语。 03 语篇与写作 梳理两篇课文的叙事与论证逻辑，完成严格三段式农业观点短文。 UNIT 5 Working the Land 单元主题图谱：粮食安全、农业创新与可持续选择 农业与粮食 CRISIS → INNOVATION → CHOICE 01 粮食挑战 shortage / hunger / crisis growing global demand 02 科技创新 hybrid rice / boost yields overcome difficulties 03 耕作选择 chemical vs organic yield / health / environment 04 责任与愿景 feed more people sustainable agriculture UNIT 5 Vocabulary Map 重点词汇图谱：危机应对、科研突破、产量贡献与农业方式 重点词汇 MEANING → FORM → USE 01 危机与应对 tackle / crisis / shortage boost / expand / generate 02 研究与判断 convince / assumption estimate / overcome / attain 03 产量与消费 yield / output / consumption domestic / comprise 04 农业与环境 conventional / organic fertiliser / nutrition / soil UNIT 5 Grammar Map 主语从句：连接词、语序、主谓一致与形式主语 主语从句 CONNECTOR → CLAUSE → PREDICATE 01 连接词选择 that / whether what / who / how / why 02 陈述语序 连接词 + 主语 + 谓语 不用疑问语序 03 形式主语it It is estimated that... It matters that... 04 易错辨析 what有意义且作成分 that不作成分； whether不用if替换 UNIT 5 Writing Map 农业观点短文：明确立场、集中论证与回应现实需求 观点类写作 POSITION → REASONS → CONCLUSION 01 P1 明确立场 chemical or organic farming 直接提出核心判断 02 P2 理由与证据 yield / health / environment 观点 + 解释 + 例证 03 P3 结论建议 重申立场 提出平衡或改进建议 04 语言迁移 subject clauses + evidence however / therefore / while UNIT 5 Text Analysis: A Pioneer Reading and Thinking：人物介绍如何呈现选择、突破、贡献与愿景 体裁与主旨 体裁：人物传记 Genre: a biographical profile 主旨：袁隆平以解决粮食短缺为使命，突破杂交水稻技术难题，并持续追求更大的农业愿景。 语篇框架 P1 identity: farmer and scientist P2 choice: tackle the food crisis P3 research question and belief P4 breakthrough: hybrid rice in 1974 P5 global contribution and awards P6 character: little care for fame P7 dreams and later vision 信息推进与写法 FRAME: identity → motivation → challenge → breakthrough → contribution → spirit EXPRESSIONS: devote his life / boost yields / overcome difficulties KEY IDEA: feed more people at home and abroad CONCLUSION: a pioneer with lifelong vision UNIT 5 Text Analysis: Farming Choices Using Language：议论文如何比较化学农业与有机农业 体裁与主旨 体裁：比较型议论文 Genre: a comparative argument 主旨：化学农业提高产量却可能损害健康与环境；有机农业更绿色，但仍难满足全球粮食需求。 语篇框架 P1 chemical farming: use and concern P2 damage to soil, water and health P3 what organic farming is P4 methods for keeping soil rich P5 limitation and unresolved demand 论证方法 LOGIC: issue → harm → alternative → methods → limitation CONTRAST: however / as an alternative / therefore EVIDENCE: bacteria, water, nutrition, crop rotation CONCLUSION: seek a sufficient and healthy solution UNIT 5 WORKING THE LAND UNIT 5 Key Points 考点串讲 FOOD AND AGRICULTURE UNIT 5 Core Vocabulary 核心词汇清单：按语义场归类，便于课堂集中复现与迁移 01 危机与应对 tackle　crisis　shortage　boost overcome　expand　generate 02 研究与判断 convince　assumption　estimate attain　conventional 03 产量与贡献 yield　output　consumption domestic　comprise 04 农业与环境 organic　fertiliser　nutrition soil　alternative　essential UNIT 5 Vocabulary Check 中文提示快说英文：先独立作答，再同伴互查 1—10 核心词汇 11—20 核心词组 1 解决；应对 2 危机 3 短缺；不足 4 使增长；促进 5 使确信；说服 6 获得；达到 7 传统的；习惯的 8 假定；设定 9 克服；解决 10 扩大；增加 11 产量；输出 12 估计；估价 13 国内的；本国的 14 消耗；消费 15 包括；由……组成 16 产生；引起 17 致力于 18 提高产量 19 由……组成 20 满足需求 UNIT 5 Vocabulary Check: Answers 按编号核对答案，并标记需要再次串讲的词汇 答案核对 读准 → 说对 → 会用 1 tackle 2 crisis 3 shortage 4 boost 5 convince 6 attain 7 conventional 8 assumption 9 overcome 10 expand 11 output 12 estimate 13 domestic 14 consumption 15 comprise 16 generate 17 devote oneself to 18 boost yields 19 be comprised of 20 meet the demand UNIT 5 考点串讲 1. tackle vt. 解决；应对；处理 情景导学 Yuan Longping chose to study agriculture to tackle the food crisis. 袁隆平选择学习农业，以应对粮食危机。 词汇拓展 tackle n. 用具；器材 tackle a problem 处理问题 用法归纳 ① tackle a crisis 应对危机 ② tackle the problem 解决问题 即时演练 Scientists are working together _______________ (tackle) the food shortage. to tackle the A practical plan is needed to tackle _______________ growing demand for food. 解析：不定式表示共同努力的目的。 解析：特指不断增长的粮食需求，用定冠词the。 UNIT 5 考点串讲 2. shortage n. 不足；缺少；短缺 情景导学 Poor harvests may lead to a serious shortage of food. 收成不好可能导致严重的粮食短缺。 词汇拓展 short adj. 短的；不足的 shorten vt. 缩短 用法归纳 ① a shortage of 缺少…… ② food/water shortage 粮食/水短缺 即时演练 Some regions still face a serious food _______________ (short). shortage of New farming methods may prevent a shortage _______________ fresh vegetables. 解析：形容词food修饰名词shortage。 解析：a shortage of为固定搭配。 UNIT 5 考点串讲 3. boost vt. 使增长；使兴旺 n. 增长 情景导学 Hybrid rice enabled farmers to boost yields in limited fields. 杂交水稻使农民能够在有限土地上提高产量。 词汇拓展 boost n. 推动；增长 a boost to 对……的推动 用法归纳 ① boost yields 提高产量 ② boost confidence 增强信心 即时演练 The new strain greatly _______________ (boost) rice production last year. boosted to Scientific support can give a strong boost _______________ sustainable farming. 解析：last year提示一般过去时。 解析：a boost to表示“对……的推动”。 UNIT 5 考点串讲 4. convince vt. 使相信；使确信；说服 情景导学 Yuan was convinced that hybrid rice could raise output. 袁隆平确信杂交水稻能够提高产量。 词汇拓展 convinced adj. 确信的 convincing adj. 有说服力的 用法归纳 ① convince sb. that 使某人相信 ② be convinced that 确信…… 即时演练 The results convinced farmers _______________ the method was effective. that convincing The scientist gave a _______________ (convince) explanation of the new method. 解析：convince sb. that...为固定结构。 解析：修饰explanation应用-ing形容词。 UNIT 5 考点串讲 5. attain vt. 获得；得到；达到 情景导学 Hybrid crops usually attain a higher yield than conventional crops. 杂交作物通常比传统作物获得更高的产量。 词汇拓展 attainment n. 达到；成就 attainable adj. 可达到的 用法归纳 ① attain a goal 实现目标 ② attain a high yield 获得高产 即时演练 The team finally _______________ (attain) its research goal after years of work. attained through Higher output is attainable _______________ careful scientific management. 解析：after years of work说明动作已经完成。 解析：through表示“通过某种方式”。 UNIT 5 考点串讲 6. conventional adj. 传统的；习惯的 情景导学 Hybrid rice can produce more than conventional crops. 杂交水稻的产量可以高于传统作物。 词汇拓展 convention n. 惯例；习俗 conventionally adv. 按惯例 用法归纳 ① conventional farming 传统农业 ② conventional methods 传统方法 即时演练 Many farmers are replacing _______________ (convention) methods with greener ones. conventional conventionally The crop was grown _______________ (conventional) without modern technology. 解析：修饰methods应用形容词。 解析：修饰动词grown应用副词。 UNIT 5 考点串讲 7. assumption n. 假定；设定；承担 情景导学 The common assumption was that such a hybrid could not be developed. 当时普遍认为这种杂交品种无法培育。 词汇拓展 assume vt. 假定；认为 assuming conj. 假如 用法归纳 ① make an assumption 作出假设 ② on the assumption that 假定…… 即时演练 It is wrong to assume _______________ chemical farming is always safer. that assumption The research challenges the common _______________ (assume) about crop yields. 解析：assume后接that引导的宾语从句。 解析：形容词common修饰名词。 UNIT 5 考点串讲 8. overcome vt. 克服；解决；战胜 情景导学 Yuan overcame enormous technical difficulties through intense effort. 袁隆平通过不懈努力克服了巨大的技术困难。 词汇拓展 overcame 过去式 overcome 过去分词 用法归纳 ① overcome difficulties 克服困难 ② overcome a crisis 战胜危机 即时演练 Researchers have _______________ (overcome) several technical problems. overcome for Cooperation is essential _______________ overcoming global food challenges. 解析：现在完成时使用过去分词overcome。 解析：be essential for doing表示“对做……很重要”。 UNIT 5 考点串讲 9. expand vt.&vi. 扩大；增加；扩展 情景导学 Hybrid rice enabled farmers to expand their output greatly. 杂交水稻使农民能够大幅提高产量。 词汇拓展 expansion n. 扩大；扩张 expanded adj. 扩大的 用法归纳 ① expand output 扩大产量 ② expand into 扩展到…… 即时演练 The programme _______________ (expand) into more farming regions next year. will expand expansion The rapid _______________ (expand) of farmland may damage natural habitats. 解析：next year提示一般将来时。 解析：形容词rapid后接名词。 UNIT 5 考点串讲 10. output n. 产量；输出 vt. 输出 情景导学 The first hybrid rice helped farmers increase their output. 第一代杂交水稻帮助农民提高了产量。 词汇拓展 input n. 投入；输入 high-output adj. 高产的 用法归纳 ① increase/expand output 提高产量 ② annual output 年产量 即时演练 Farm output _______________ (increase) steadily since 2020. has increased of The region produces an annual output _______________ two million tons of grain. 解析：since 2020提示现在完成时。 解析：an output of表示“……的产量”。 UNIT 5 考点串讲 11. estimate vt. 估计；估价 n. 估计 情景导学 It is estimated that hybrid rice feeds millions of people. 据估计，杂交水稻养活了数百万人。 词汇拓展 estimation n. 估计 estimated adj. 估计的 用法归纳 ① estimate the cost 估算成本 ② It is estimated that 据估计…… 即时演练 It _______________ (estimate) that demand will continue to rise. is estimated estimate The final cost was higher than the original _______________ (estimate). 解析：It is estimated that...为固定被动结构。 解析：形容词original后接名词。 UNIT 5 考点串讲 12. domestic adj. 本国的；国内的；家用的 情景导学 Hybrid strains form a large part of domestic rice consumption. 杂交品种占国内稻米消费的很大一部分。 词汇拓展 domestically adv. 国内地 domestic market 国内市场 用法归纳 ① domestic consumption 国内消费 ② domestic production 国内生产 即时演练 The new crop is grown mainly for the _______________ (domestic) market. domestic domestically Most of the grain is produced _______________ (domestic). 解析：修饰market应用形容词domestic。 解析：修饰produced应用副词。 UNIT 5 考点串讲 13. consumption n. 消耗；消耗量；消费 情景导学 Domestic rice consumption remains high in many regions. 许多地区的国内稻米消费量仍然很高。 词汇拓展 consume vt. 消耗；消费 consumer n. 消费者 用法归纳 ① food consumption 食物消费 ② energy consumption 能源消耗 即时演练 Household water _______________ (consume) can be reduced through better farming. consumption than The process consumes less energy _______________ conventional farming. 解析：water修饰名词consumption。 解析：less...than...表示比较。 UNIT 5 考点串讲 14. comprise vt. 包括；包含；由……组成 情景导学 Hybrid crops comprise a large share of China's rice production. 杂交作物占中国稻米产量的很大比例。 词汇拓展 comprise不用于进行时 comprising prep. 包括 用法归纳 ① comprise several parts 包含几部分 ② be comprised of 由……组成 即时演练 The project is comprised _______________ three research stages. of comprise Ten farming villages _______________ (comprise) the research area. 解析：be comprised of为固定搭配。 解析：陈述客观构成，用一般现在时。 UNIT 5 考点串讲 15. generate vt. 产生；引起；生成 情景导学 Improved seeds can generate higher yields with less land. 改良种子能够以更少的土地获得更高产量。 词汇拓展 generation n. 产生；一代 generator n. 发电机 用法归纳 ① generate income 创造收入 ② generate interest 引起兴趣 即时演练 The new programme has _______________ (generate) strong interest among farmers. generated generation Clean energy _______________ (generate) is essential for modern farms. 解析：现在完成时使用过去分词generated。 解析：此处需要名词generation作主语中心词。 UNIT 5 Core Sentence Patterns 01 sb., known as..., ... 身份补充 02 What... was that... 主语与表语从句 03 Whether... was... 是否与争议 04 It is estimated that... 形式主语 05 Given that..., ... 原因与背景 06 What impressed... was... 评价与品质 UNIT 5 Sentence 1 课文原句 Yuan Longping, known as the “father of hybrid rice”, was one of China’s most famous scientists. 袁隆平被誉为“杂交水稻之父”，是中国最著名的科学家之一。 核心结构 sb., known as..., ... 语法功能 过去分词短语作后置定语，补充人物身份。 使用要点 从课文语境识别结构，再迁移到粮食安全、科研精神与农业选择。 即时训练 袁隆平被誉为杂交水稻之父，一生致力于农业研究。 Yuan Longping, known as the father of hybrid rice, devoted his life to agricultural research. 这项技术被称为绿色农业，为农民提供了新选择。 The technology, known as green farming, offers farmers a new choice. UNIT 5 Sentence 2 课文原句 What concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat. 最让他担忧的是农民经常收成不好，有时甚至严重缺粮。 核心结构 What... was that... 语法功能 what引导主语从句，that引导表语从句。 使用要点 从课文语境识别结构，再迁移到粮食安全、科研精神与农业选择。 即时训练 最令研究人员担心的是土地质量正在下降。 What concerns researchers most is that soil quality is declining. 最令消费者关注的是食品是否安全。 What concerns consumers most is whether the food is safe. UNIT 5 Sentence 3 课文原句 Whether it was possible to develop a hybrid of self-pollinating plants such as rice was a matter of great debate. 能否培育水稻等自花授粉作物的杂交品种是一个极具争议的问题。 核心结构 Whether... was a matter of... 语法功能 whether引导主语从句，位于句首时不能换成if。 使用要点 从课文语境识别结构，再迁移到粮食安全、科研精神与农业选择。 即时训练 有机农业能否满足全球需求仍是一个问题。 Whether organic farming can meet global demand remains a question. 新技术能否保护土壤仍有待观察。 Whether the new technology can protect the soil remains to be seen. UNIT 5 Sentence 4 课文原句 It is estimated that about 60 percent of domestic rice consumption in China is comprised of crops generated from Yuan’s hybrid strains. 据估计，中国约60%的国内稻米消费来自袁隆平培育的杂交水稻品种。 核心结构 It is estimated that... 语法功能 it作形式主语，that从句是真正主语。 使用要点 从课文语境识别结构，再迁移到粮食安全、科研精神与农业选择。 即时训练 据估计，这项技术每年可节约大量用水。 It is estimated that the technology can save a large amount of water each year. 据报道，更多农民正在改用有机方法。 It is reported that more farmers are switching to organic methods. UNIT 5 Sentence 5 课文原句 Given that Yuan’s hybrids made him quite wealthy, one might think he would have retired to a life of leisure. 考虑到杂交水稻使袁隆平相当富有，人们可能以为他会退休享受闲适生活。 核心结构 Given that..., one might think... 语法功能 given that引导原因状语从句，表示“考虑到”。 使用要点 从课文语境识别结构，再迁移到粮食安全、科研精神与农业选择。 即时训练 考虑到粮食需求不断增长，我们必须继续创新。 Given that food demand is growing, we must continue to innovate. 考虑到土壤需要保护，农民应减少化学品使用。 Given that soil needs protection, farmers should reduce chemical use. UNIT 5 Sentence 6 课文原句 What impressed people most about Yuan Longping was his ongoing ability to fulfil his dreams. 袁隆平最令人钦佩的是他不断实现梦想的能力。 核心结构 What impressed... most was... 语法功能 what引导主语从句，在从句中作主语。 使用要点 从课文语境识别结构，再迁移到粮食安全、科研精神与农业选择。 即时训练 最令我钦佩的是他解决粮食危机的决心。 What impresses me most is his determination to tackle the food crisis. 最重要的是农业发展不能损害环境。 What matters most is that agricultural development must not harm the environment. UNIT 5 WORKING THE LAND Grammar 单元语法复习 Subject Clauses UNIT 5 Grammar Review 主语从句：连接词、陈述语序、主谓一致与形式主语 01 结构提炼 结构：连接词 + 陈述语序；整个从句在主句中作主语。 02 核心意义 连接：that不作成分；what作成分；whether表示“是否”。 03 常见功能 语序：从句内部使用陈述语序，不用疑问语序。 04 复习重点 重点辨析what/that、whether/if、it形式主语及谓语单复数。 复习主线：看成分 → 判语义 → 选连接词 → 核对语序和谓语。 UNIT 5 Key Point 1 连接词选择：先看从句是否缺少成分 基本结构 What Yuan Longping cared about was not money. That hybrid rice raised output changed farming. 从句缺成分 what/who/which既连接从句，又在从句中作主语、宾语或表语。 从句不缺成分 that只连接、不作成分；whether表示“是否”。 判断要点 先检查从句主干是否完整，再根据句意选择连接词。 UNIT 5 Key Point 2 陈述语序与形式主语it 陈述语序 How farmers can boost yields remains important. • 连接词 + 主语 + 谓语 • 不写how can farmers 形式主语it It is estimated that... It is important that... • it放句首保持平衡 • that从句是真正主语 判断关键 主语从句较长时，常用it作形式主语。 It + be + 形容词/过去分词/名词 + that从句。 UNIT 5 Key Point 2 形式主语it：三类常用句型归纳 It + be + 形容词 + that从句 important / clear / obvious / possible likely / natural / strange / necessary 表示评价、判断或可能性；that不作成分。 It + be + 过去分词 + that从句 said / believed / reported / known estimated / expected / proved / suggested 表示报道、认知、推测或建议；注意被动形式。 It + be + 名词 + that从句 a fact / a pity / a shame / a wonder a surprise / a relief / common knowledge 表示事实或说话人的感受与评价；从句使用陈述语序。 UNIT 5 Key Point 3 易错点：what/that、whether/if与主谓一致 what与that What farmers need is support. That support is necessary is clear. whether与if Whether the plan works remains unknown. 句首主语从句一般不用if。 主谓一致 What he said is important. What we need are better seeds. 主语从句通常视为单数；what从句作主语时也可根据表语含义确定谓语。 UNIT 5 Gaokao Practice 2026届真题语境训练：主语从句 1. It has been evidenced _______________ urban birds are adapting the volume and length of their songs to fight against the noise. （北京东城期末） 2. _______________ makes the process painstaking is that it involves dozens of complicated steps — scraping, splitting, slicing, thinning and stretching the fibers. （烟台一模） 3. _______________ spreads globally is not China in its full complexity, but daily bits. （青岛二模） 4. _______________ started as a way to feel more comfortable soon became a daily habit and eventually a passion. （广东一模） that What What What What What What What 5. _______________ once belonged to the royal court became something people could listen to, learn from and pass on. （深圳二模） 6. _______________ is traditional can become fashionable. （南通二模） 7. _______________ was once seen as a problem for development has become something valuable. （江苏基地联考） 8. _______________ struck him was how much aging had become a part of Chinese society. （宁波二模） UNIT 5 Layered Practice 分层练习：连接词、形式主语与主语从句后的谓语 1. It is widely believed _______________ healthy soil is the basis of sustainable farming. 2. _______________ will lead the field study has not yet been decided. 3. Whether the new seed can resist disease _______________ (remain) uncertain. 4. _______________ method farmers should choose depends on local conditions. 5. It is no wonder _______________ Yuan Longping is respected around the world. 6. What the research team needs most _______________ (be) reliable data. 7. What local farmers need _______________ (be) better seeds and practical training. 8. It never occurred to the researchers _______________ the wild rice might hold the key. 9. _______________ the technology can be made affordable is what concerns small farms most. 10. It remains uncertain _______________ the new technique can be used on small farms at a reasonable cost. that Who remains Which that is are that How whether UNIT 5 Contextual Practice 语篇训练：袁隆平与杂交水稻 语法填空 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。 _______________ Yuan Longping cared about most was helping farmers. _______________ concerned him was the frequent shortage of food. _______________ larger fields were not the solution became clear to him. _______________ farmers needed was a way to boost yields. _______________ a rice hybrid could be developed was widely debated. _______________ he overcame the technical difficulties shows his determination. _______________ is estimated that hybrid strains now form a large part of China's rice production. _______________ his work helped other countries is equally important. _______________ impressed people most was his ability to fulfil dreams. _______________ he would dream up next always excited everyone. What 语篇覆盖：what / that / whether / how引导主语从句及形式主语it What That What Whether How It That What What UNIT 5 Contextual Practice 语篇训练：选择可持续农业 语法填空 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。 _______________ farming method should be preferred remains a difficult question. _______________ concerns many consumers is food safety. _______________ chemical pesticides may remain in soil and water is widely known. _______________ they affect human health requires further study. _______________ organic farming protects soil is one of its strengths. However, _______________ it can meet global demand is still uncertain. _______________ farmers need is a practical balance between yield and sustainability. _______________ new technology can lower costs matters as well. _______________ is essential that governments provide scientific guidance. Ultimately, _______________ works best may differ from place to place. Which What That How That whether What 语篇覆盖：主语从句连接词、陈述语序、语义判断与形式主语 Whether It what UNIT 5 Grammar Transfer 综合运用：用主语从句概括农业问题 任务 用6—8句话说明粮食安全面临的一个问题，至少使用两个主语从句。 内容：问题是什么、为什么重要、可能的解决办法以及仍需研究的方面。 示例表达 What concerns many people is food safety. Whether organic farming can meet demand remains uncertain. 完整示例 What matters most is providing safe and sufficient food. That chemical farming can raise output is clear, but how it affects soil must also be considered. Whether organic methods can meet global demand remains uncertain. It is important that scientists and farmers work together. What we need is a balanced and sustainable solution. UNIT 5 WORKING THE LAND Writing 主题写作 Choosing a Better Way to Farm UNIT 5 Writing Task 写作任务：就化学农业或有机农业发表观点 校英文报农业专题 围绕chemical farming与organic farming选择立场，写一篇三段式观点短文。 内容包括：明确立场；分析主要理由；给出结论或建议。词数80左右，严格三段。 01 写什么 主题 / 立场 / 核心判断 02 怎样证明 产量 / 健康 / 环境 / 成本 / 证据 03 怎样表达 重申立场 / 平衡建议 / 现实可行性 写作目标：立场明确，论证集中，证据具体，三段清楚，语言准确。 UNIT 5 Read for Writing 范文分析：农业观点短文的三段式论证框架 结论与立场 明确议题 + 直接表态 In my opinion, organic farming is preferable for long-term development. 第一段简洁表态，不堆积背景。 核心理由 + 解释证据 soil health → food safety；fewer chemicals → less pollution；natural methods → sustainability 第二段信息最丰富，每个观点后补充解释。 重申观点 + 可行建议 A balanced transition can protect nature while maintaining output. 第三段给出结论和建议。 语篇逻辑：立场 → 理由与证据 → 结论和建议 UNIT 5 Plan the Structure 写前构思：三段分别完成表态、论证和结论 空泛 立场与主题 支持哪种农业方式 / 核心判断 第一段只需明确选择和总理由。 具体 理由与证据 产量 / 土壤 / 水源 / 营养 / 成本 哪些事实能够支持你的观点？ Technology is dangerous. 结论与建议 重申立场 / 承认限制 / 提出改进路径 如何避免只谈优点而忽视现实需求？ 选材原则 选择两至三个相互支持的理由，用because、for example和however展开。 第一段简洁表态；第二段信息最丰富； 第三段给出结论和建议。 UNIT 5 Language Toolkit 语言支架：从立场表达走向有据论证 提出立场 In my opinion... / I believe... / From my point of view... 组织理由 The main reason is... / Another advantage is... / For example... 回应限制 However... / Admittedly... / What remains uncertain is... 得出结论 Therefore... / A balanced solution is... / It is essential that... 句式升级：使用主语从句概括核心问题，用while或however呈现权衡。 UNIT 5 Sentence Upgrade 写前训练：把农业观点译成准确、自然的英文句子 1 最重要的是确保食品既安全又充足。 What matters most is ensuring that food is both safe and sufficient. 2 有机农业能否满足全球需求仍不确定。 Whether organic farming can meet global demand remains uncertain. 3 我们需要的是兼顾产量、健康和环境的平衡方案。 What we need is a balanced solution that considers yield, health, and the environment. UNIT 5 Timed Writing 限时写作：15分钟完成一篇80词左右的三段式观点短文 写作要求 比较化学农业和有机农业，选择你支持的一种方式并阐述理由。 至少使用2个单元词组，并尝试使用1处主语从句。 P1 表态 议题 / 选择 / 总理由 句型提示：In my opinion... / What matters most is... P2 论证 产量 / 健康 / 环境 / 成本 / 证据 句型提示：The main reason is... / For example... P3 结论 重申立场 / 平衡建议 / 改进路径 句型提示：Therefore... / It is essential that... 完成后检查：是否严格三段？理由是否具体？是否回应现实需求？ UNIT 5 Model Essay 完整范文 Why Organic Farming Deserves Support In my opinion, organic farming is a better choice for long-term agricultural development. What matters most is protecting food safety and the environment. Organic farmers avoid artificial chemicals and use natural methods to enrich the soil. Therefore, crops are safer, and soil and water suffer less pollution. Therefore, we should promote organic methods while using science to improve their output. A gradual and practical transition can protect nature and meet people's needs. 评价量表 1 立场明确 2 严格三段 3 理由具体 4 论证有据 5 语法拼写 每项2分，共10分 UNIT 5 Gaokao Writing Practice 高考应用文写作：观点表达类议论文 写作任务 学校计划每周安排一节农业劳动课。请为校英文报Opinion栏目写一篇短文，表明你是否支持，并阐述理由。 写作要求：自拟标题；观点明确；理由充分；词数80左右；严格三段。命题情境参考2024、2025年全国卷应用文的校园真实任务。 01 体裁与对象 观点议论文 面向校英文报读者 02 结构与字数 严格三段式 词数80左右 03 语言迁移 明确立场与理由 联系单元主题 限时建议 审题与立意3分钟 → 写作12分钟 → 检查2分钟。检查立场、论据、段落衔接和语言准确性。 UNIT 5 Reference Model 观点表达类议论文参考范文 A Farming Class Is Worth Having I support the plan to offer a weekly farming class because it connects school learning with real life. Working in a field allows us to understand how food is produced and why every grain should be valued. It can also build responsibility and practical skills. More importantly, what we learn from the land may inspire us to think about food safety and sustainable farming. Therefore, the class is worth introducing. With suitable guidance and manageable tasks, it can become a meaningful part of school education. UNIT 5 Reference Model 观点表达类议论文参考范文（反方） A Weekly Farming Class Is Not Necessary I do not support a weekly farming class because our school timetable is already demanding. Although farming experience is valuable, a fixed class may reduce time for core subjects and add pressure. Some schools also lack land, equipment, and trained teachers. What students need is flexible practice, not another compulsory lesson. Therefore, schools could organize occasional farming projects or weekend activities instead. Students would gain practical experience without carrying a weekly burden. $