Unit 4 Grammar 教学设计 2026-2027学年英语译林版八年级上册

Unit 4 Hands-on fun Grammar 课　　题 Unit 4 Hands-on fun — Grammar 课　　型 语法课（Grammar） 课　　时 第三课时（45分钟） 授课年级 八年级上册 教　　材 译林版（2024）英语八年级上册 话　　题 祈使句与建议表达——DIY 中的指令与提醒 核心素养目标 语言能力 掌握祈使句肯定/否定结构，理解并运用 should 和 had better 提出建议或警告。 文化意识 了解英语建议语气强弱差异，学会在动手实践中礼貌安全交流。 学习能力 通过观察对话归纳语法规则，在制作闪卡等实践中巩固知识。 思维品质 能根据 DIY 场景逻辑，准确选择指令词或建议词进行表达。 教学重点 ①祈使句的基本结构（Do.../Don't.../Let's...）与四种语气功能②should 与 had better 的用法及区别；两者均接动词原形 教学难点 ①had better not do 的正确形式（不可写成 hadn't better）；Don't be... 的 be 动词否定②根据语境恰当区分 should（温和建议）与 had better（强语气/后果暗示） 教学过程 教学环节 教师活动 学生活动 导入 Warm-up Free talk：What do you say when you want someone to do, or not to do, something?（想让别人做/不做某事时怎么说？） 看标志牌猜含义：Can you guess what these signs mean? Where can you see these signs? How do we say them in English?——Don't touch!／Keep off the grass! 等。 DIY 话题预热：Do you like DIY? What have you made by hand? 用中英文说出「让别人做/不做」的表达； 认读标志牌并归纳其语言特征（动词原形开头）。 情境铺垫 Lead-in Your friend is painting a bird box. What advice do you give? Give your friend two pieces of advice. Which sounds stronger? What should your friend NOT do? 两条建议设计：一条用 should（You should clean the box first.），一条用 had better（You'd better not get too much paint on the brush.）——语气强弱即本课第二语法点的引子。 给刷鸟箱的朋友出两条建议； 比较两条建议哪条听起来更强。 对话观察 Dialogue study Millie and Andy are trying to put together a bookshelf. Read and pay attention to the parts in bold：Andy: Let's put the pieces of wood together. Please hand the tools to me. Millie: OK. Here you are. What else can I do? Suzy: Look for the chalk mark on the top of each piece. Make sure pieces of the same size are in the same group. Don't mix them up! 观察四句的四个「开关」：Let's（提议）、Please（礼貌）、动词原形 Look for/Make sure（指令）、Don't（禁止）——一段对话四种祈使句。 朗读对话并圈出加粗部分； 按功能给四句分类（提议/礼貌请求/指令/禁止）。 规则归纳 Rules summary Imperative sentences 四条：①动词原形开头表指令（start with the base form of a verb）；②动词前加 don't 表否定；③加 please 更礼貌；④let's 提议一起做。主语通常为第二人称 you，一般省略。 语气谱系：Turn off the lights before you leave.（叮嘱/命令）Enjoy your meal!（希望/祝愿）Keep your voice down in the library.（劝告）Don't touch the wet paint!（禁止/警告）。同一句可变调：Turn off the lights.（命令）→Please turn off the lights.（礼貌）→Don't turn off the lights!（禁止）。 归纳祈使句四条规则； 朗读四种语气例句并体会差别； 观察 please 位置对语气的影响。 肯定结构 Affirmative forms ①Be+表语（名词或形容词）：Be patient with the elderly. 对老人要耐心；Be a good listener. 做一个善于倾听的人。②Let+宾语+动词原形：Let her explain the situation.（请求/允许）；Let's take a short break.（Let's=Let us，集体行动提议）。 ③动词原形(+宾语)(+其他)：Pass me the salt.（双宾语请求）；Drive carefully!（叮嘱/警告）。please 位置规则：句首其后不用逗号（Please pass me the ball.）；句末其前通常加逗号（Pass me the ball, please.）——两句等义。 朗读三种肯定结构例句； 归纳「Be/Let/动作动词」三类开头； 记忆 please 的逗号规则。 否定结构 Negative forms ①Don't+be+表语：Don't be rude to the guests! 别对客人无礼；Don't be a stranger. 别生分了——be 动词的否定形式为 Don't be...。②Don't let+宾语+动词原形（口语常用）／Let+宾语+not+动词原形（书面正式）：Don't let the children play near the road.＝Let the children not play near the road. ③Don't/Never+动词原形(+宾语)(+其他)：Don't touch the wet paint.（即时禁止/提醒）；Never leave your luggage unattended. 切勿让行李无人看管（Never 表严格禁令/安全警示）。 朗读三种否定结构例句； 辨析 Don't let 与 Let...not 的语体差异； 体会 Never 与 Don't 的禁令强度差别。 闪卡七空 Controlled practice Millie is teaching her classmates how to make flashcards. Complete the sentences with the words in the box (cut/draw/give/keep/look/try/write)：(1) Cut cards out of pieces of paper with a pair of scissors.（用剪刀把纸剪成卡片）(2) Write some words or a sentence on each card. (3) Draw a picture to show the words or sentence on the other side of the card.（另一面画图示意）(4) Look at the picture and (5) try to say what is on the other side.（看图尝试说出另一面内容）(6) Please don't give up.（请别放弃）(7) Keep trying and you will find you can remember things better.（坚持尝试，你会记得更牢） 点破：七空三种句式轮换——动词原形指令→Please don't 否定（give up 放弃）→Keep doing（坚持做）；try to do 尝试做与 Keep trying 别放弃呼应。 独立完成七空； 核对答案并给每句贴句式标签； 朗读串成完整的「闪卡制作说明书」。 参考答案：(1) Cut　(2) Write　(3) Draw　(4) Look　(5) try　(6) don't give　(7) Keep 输出 Writing There is a new type of desk at your school. You can change the height of the desk by pressing a button. Write some sentences to teach your classmates how to use the desk. 示例骨架：Press the button to change the height.（按按钮调高度）Don't put your hands under the desktop when you press the button.（按按钮时别把手放桌面下）Be careful with the sharp corners.（小心尖锐边角）Let's keep the desk clean after using it.（用完保持整洁）。自查三问：有动词原形指令吗？有 Don't/Never 安全警示吗？有 please/Let's 礼貌缓冲吗？ 用三种句式写课桌使用说明； 按自查三问互评修改。 对话观察 Dialogue study 2 Suzy and her mum are trying to paint a bird box. Read and pay attention to the parts in bold：Mum: Here's the paint. We'd better clean the bird box first.（最好先清洗鸟箱）Suzy: OK, I'll help you. Mum: Now you should mix the paint well. Then put the brush into the paint. You'd better not get too much paint on the brush.（应该把油漆调匀；刷子上最好别蘸太多漆）Suzy: Is this OK? Mum: Yes. Move the brush up and down slowly like me. You shouldn't go too fast, Suzy.（像这样慢慢上下刷；不应该太快） 四句建议两对正负：'d better clean（肯定）↔'d better not get（否定）；should mix（肯定）↔shouldn't go too fast（否定）。 朗读对话并圈出四个建议词； 配对肯定与否定形式； 体会妈妈语气在 should 与 had better 间的切换。 归纳对比 Comparison We use should and had better when giving advice and telling people what we think is best or the right thing to do. Tip：'d better = had better；shouldn't = should not；The tone of had better is stronger than should. 两者都是情态动词，后接动词原形，没有人称和数的变化。 对比表四栏：语气强度——had better 强（接近警告/催促）vs should 弱（友好建议/期望）；隐含含义——had better「不做会有麻烦」vs should「这样做是好的/对的」；适用场景——had better 紧急情况/具体风险/严重后果 vs should 日常建议/道德义务/普遍真理；否定形式——had better not do vs should not/shouldn't do。 例句对比：You had better leave now, or you'll miss the last bus.（隐含后果：错过车）vs You should get more sleep if you want to stay healthy.（温和建议） 填写对比表四栏； 朗读例句对比体会语气； 记忆否定形式 had better not do（不可 hadn't better）。 七句建议 Controlled practice 2 Suzy is giving DIY advice to her classmates. Help Suzy make sentences with should (not) or had better (not)：1 useful books about DIY→You should/had better read them slowly and carefully. 2 DIY is not always easy→You should/had better practise more. 3 Instructions are important→You should/had better not begin your work without reading them.（不读说明书别开工）4 Scissors can be dangerous→You should/had better not play with them. 5 It takes time→You should/had better be patient.（要有耐心）6 Glue can hurt your skin and eyes→You should/had better be careful when you use it. 7 You should/had better join a DIY club to learn more about it.（加入 DIY 社团） 点破：按「语境风险」选词——剪刀伤人/胶水伤眼等具体风险→had better not（更强）；多练/耐心/入社团等一般建议→should（温和）。not 位置：had better not do／should not do，均在情态动词后。 按语境完成七句建议； 说出每句选 should 还是 had better 的理由； 核对 not 的位置。 参考答案：1. You should/had better read them slowly and carefully. 2. You should/had better practise more. 3. You should/had better not begin your work without reading them. 4. You should/had better not play with them when you do DIY jobs. 5. You should/had better be patient. 6. You should/had better be careful when you use it. 7. You should/had better join a DIY club to learn more about it. 语言点精讲 Language points ①祈使句肯定：以动词原形开头，用于表达指令、建议、请求或操作步骤；DIY 语境中常描述制作过程中的具体动作；语气直接，主语 you 被省略。例：Cut the paper into small pieces. 把纸剪成小片。／Mix the paint and water well. 把油漆和水充分混合。 ②祈使句否定：结构为「Don't+动词原形」，用于表示禁止、警告或劝阻；在安全提示和操作规范中极为高频；be 动词的否定形式为 Don't be...。例：Don't use scissors without adult help. 没有大人帮助不要用剪刀。／Don't touch the wet paint. 不要碰未干的油漆。 ③should 与 had better：should 表示一般性建议或义务，语气较温和，否定形式 shouldn't；had better 语气比 should 更强，带有「如果不这样做可能会有不良后果」的暗示，否定形式为 had better not+动词原形（易错点：不可写成 hadn't better）。例：You should keep the workspace clean. 你应该保持工作区域整洁。／You'd better not mix chemicals randomly. 你最好不要随意混合化学品。 三组语言点逐组理解并造句； 熟记：祈使句四种开头；should 温和/had better 强语气带后果；否定均在情态动词后加 not； 用检测题反向验证：具体风险选 shouldn't、or 后果句选 had better。 随堂检测 Testing 完成随堂检测：教师发放随堂检测题，学生限时独立完成后，教师逐题核对讲评。 【一、单项选择】 1. — The glue can hurt your skin. You __________ play with it. A. shouldn't　B. don't　C. not　D. hadn't better 2. You __________ leave now, or you will miss the last bus. A. should　B. had better　C. please　D. let's 【二、用括号内单词的正确形式填空】 3. Please __________ (not mix) the chemicals randomly; it is dangerous. 4. You __________ (should) read the instructions carefully before starting. 5. __________ (be) patient with the elderly when you help them. 6. You'd better __________ (not leave) the wet paint unattended. 7. Let's __________ (try) to make flashcards to remember words better. 限时独立完成随堂检测，不看笔记、不讨论； 完成后与同桌交换互批，逐题核对答案并订正； 订正后用红笔标注错题涉及的规则（shouldn't 否定／had better 后果暗示／Please don't mix／should 原形／Be patient 祈使句 Be 开头／had better not leave／Let's try 原形），纳入复习清单。 参考答案：一、1. A　2. B　二、3. don't mix　4. should　5. Be　6. not leave　7. try 归纳与作业 Summary & Homework Summary 两条：①祈使句——以动词原形开头表指令（Cut...），否定用 Don't+动词原形（Don't touch...），委婉加 Please，提议用 Let's。②Should vs. Had better——两者均接动词原形表建议；should 语气较温和；had better 语气更强，暗示不做的后果，其否定形式为 had better not do。 Homework：Review——Memorize the structures of imperative sentences and the differences between "should" and "had better". 背记祈使句结构与 should/had better 的区别。Preview——Preview the next lesson. 预习下一课。 默写祈使句四种开头与对比表要点自查； 记录作业：背语法区别；预习下一课。 作业设计（分层） 【基础·必做】抄记祈使句肯定/否定结构与 should/had better 对比表，各默写两遍，完成课本 Grammar 部分练习。 【提升·选做】为家里的一件电器写 5 句英文使用说明：至少 2 句祈使句指令、1 句 Don't/Never 警告、1 句 should 或 had better 建议。 【拓展·挑战】以 DIY Safety Tips 为题写 80 词短文：向同学介绍做手工的安全注意事项，至少用 3 个祈使句（含 1 个 Never）与 3 处 should/had better（含 1 个否定），并说明理由。 板书设计 Unit 4 Hands-on fun — Grammar 祈使句与建议表达 祈使句：动词原形开头（you 省略）｜Don't 否定｜please 礼貌（句首无逗号/句末前加逗号）｜Let's 提议 肯定三式：Be+表语｜Let+宾语+原形｜动词原形(+宾语)　否定三式：Don't be...｜Don't let/Let...not｜Don't/Never+原形 should：温和建议（这样做是对的）｜否定 shouldn't do had better：强语气（不做会有麻烦，or you'll...）｜否定 had better not do（✗hadn't better） 教学评价与反思 1. 目标—评价对应（教-学-评一体化）： 素养目标 课堂评价任务与证据 语言能力：祈使句与建议表达 书架对话四句观察；闪卡七空；刷箱对话四句；Suzy 七句；随堂检测七题 文化意识：语气强弱与礼貌安全交流 please/Let's 的礼貌缓冲；Never 安全警示；建议语气的场合适配 学习能力：对话观察归纳规则 两段对话→四条规则/一张对比表的自主归纳；说明书写作自查三问 思维品质：语境选择与风险判断 should vs had better 按语境风险选词；not 位置的精确控制；hadn't better 陷阱辨析 2. 预设反思点： 以「让别人做/不做怎么说」导入，把祈使句从标志牌（Don't touch!／Keep off the grass!）的天然语境里请出来；刷鸟箱两条建议（should/had better 各一条）先埋语气强弱之问；装书架对话一段四种祈使句（Let's/Please/动词原形/Don't），「语气家族」的分类让规则有了活样本；四条规则归纳后用同一句变调（命令→礼貌→禁止）演示「加什么词语气往哪走」；肯定三式（Be/Let/动词原形）与否定三式（Don't be/Don't let=Let...not/Don't/Never）成对呈现，please 的逗号规则（句首无/句末有）是细节考点；闪卡七空是「制作说明书=祈使句串烧」的活用，give up 与 Keep trying 的呼应让否定与坚持同框；升降课桌输出按自查三问（指令/警示/礼貌）验收；刷箱对话里妈妈的语气切换（'d better clean↔'d better not；should mix↔shouldn't go too fast）是对比表的最佳注脚；对比表四栏（语气/含义/场景/否定）一张表定用法，「or you'll miss the last bus」的后果句与「for your health」的温和句让选择有据可依；Suzy 七句按「语境风险」选词把 should/had better 的分界练成直觉；had better not do（不可 hadn't better）作为拼写级易错点双重强调；随堂检测两选五空当堂闭环，电器说明书作业让语法回到 DIY 生活。 学科网（北京）股份有限公司 $