Unit 5 单元写作导学案-2023-2024学年高中英语人教版（2019）选择性必修第一册

选择性必修一Unit5 如何写优缺点类议论文 写作任务 假定你是李华，在英语课上你们班同学就“转基因作物的利与弊"进行了讨论.请你根据 讨论结果写一篇英语短文向校英文报投稿。 利 弊 你的观点 1.产量高，缓解粮食短缺问题： 1.可能对人体有害： 2.农药使用少，生产成本低 2.可能对环境造成威 价格便宜。 胁。 破坏生态平衡，影响作物 的多样性。 注意：1.词数120左右：2.可以适当增加细节，以使行文连贯。 参考词汇：转基因作物genetically modified crops 写作指导 一、审题定调 本写作任务要求论述“转基因作物的利与弊”，是一篇阐述优缺点类型的议论文。因此写 作时要围绕“利”与“弊”进行闸述，闸述过程要做到层次分明、逻辑清晰。时态以一般现在时 为主。 二、谋篇布局 本写作可分为三部分： 第一部分：引出话题： 第二部分：分层论述（利与弊）： 第三部分：提出自己的观点。 三、常用表达 ★过渡性词汇： firstly first first of all...;secondly second...;lastly last but not least... on the one hand...on the other hand...;for one thing...,and for another...; besides;in addition: moreover:furthermore:what's more all in all;in conclusion;in a word;in short;in brief;to sum up;to conclude; balancing the advantages and the disadvantages;considering the pros and cons ★表达个人观点： As for me,… I would prefer to.… I firmly believe that .. I personally feel that... I partly /fully agree that... As far as I am concerned... I firmly support the view that... In my opinion,...is preferable to... The advantages outweigh the disadvantages. 范文展示 范文一 In recent years,more and more genetically modified crops have entered the market and they are popular with many consumers. Generally speaking,genetically modified crops have many advantages. First,genetically modified crops have higher yields than ordinary crops,thus partly alleviating the problem of worldwide food shortages.Second,they require less pesticide use and production costs are lower. As a result,food prices are also lower. At the same time,they also have many disadvantages.For example, genetically modified crops may be harmful to our health.Besides,they may affect biological diversity.break the balance of nature and threaten the environment as well. As for me,I believe genetically modified crops could benefit human beings,if we do our best to avoid their harmful effects. 范文二 These days more and more genetically modified crops have been appearing on supermarket shelves,which are favored by many consumers. On the one hand,ge