Unit3语法专项课件- Wh-词+动词不定式 2026-2027学年沪教版（五四学制）九年级英语上册

这是一份初中英语同步教学课件，针对沪教五四学制九年级上册Unit3“Wh-词+动词不定式”语法专项，包含结构总览、句法功能解析、难点辨析及分层练习，为学生构建从基础到应用的学习支架，助力掌握核心用法。 资料特色突出，以“结构-功能-转换-难点”逻辑展开，通过what/how对比例句、句型转换实例等培养学生语言运用能力与思维品质，分层练习适配不同水平，解题四步法提升学习能力，能帮助学生攻克升学考点，为教师提供系统教学支持。

教学课件 沪教英语（五四学制）九年级上册 Unit3 语法专项 ——Wh-词+动词不定式 全解精讲+分层练习 1 1. 熟记可接不定式的全部Wh-疑问词 2. 掌握该结构三种核心句法功能 3. 精通宾语从句与不定式结构互换规则 4. 攻克how to do与what to do高频难点 5. 牢记why不接不定式的必考禁忌 学习目标 核心结构总览 通用公式：Wh-疑问词 + to + 动词原形 可用疑问词：what/when/where/which/who/how 绝对禁用疑问词：why（无why to do结构） 整体为名词性短语，可充当多种句子成分 基础拓展 what to do 做什么 where to go 去哪里 when to start 何时出发 how to learn 如何学习 which to choose 选择哪一个 句法功能一：作宾语（最高频） 常搭配动词：know/decide/tell/wonder/learn 多用于主谓宾结构，简化长句句式 例句：I wonder where to spend the holiday. 句意：我想知道去哪里度过假期。 句法功能二：作表语 放在be动词后，解释主语具体内容 多用于说明问题、计划、难点等内容 例句：My question is how to improve my English. 句意：我的问题是如何提升我的英语。 句法功能三：作主语 多用于书面正式句式，日常使用较少 谓语动词统一使用单数形式 例句：What to do next is very important. 句意：接下来要做什么非常重要。 核心考点：宾语从句互换规则 转换条件：主句主语 = 从句主语 转换方法：去掉主语、情态动词，换to do 主语不一致时，绝对不能转换句式 是句型转换题型必考核心考点 句式转换例句精讲 从句版：I don’t know what I should do. 不定式版：I don’t know what to do. 从句版：She decides where she will travel. 不定式版：She decides where to travel. 禁止转换特殊情况 主从句主语不同，不可替换不定式 错句转换：Mum tells me where she goes. 本句无法改为where to go，主语不一致 做题优先核对主从句主语是否统一 重难点：what vs how what to do：what自带宾语，do后不接名词 how to do：how仅表方式，do后必须加宾语 口诀：what自带成分，how必须补成分 中考单选、改错最高频易错点 what与how对比例句 正确：I don’t know what to do.（无后续宾语） 正确：I don’t know how to do it.（补充宾语it） 错误：I don’t know what to do it.（语义重复） 错误：I don’t know how to do.（成分残缺） 必考禁忌：why的用法 英语中无why to do不定式结构 错误：I don’t know why to stay here. 正确：I don’t know why we stay here. why后只能接完整宾语从句 解题四步法 第一步：排除why to do错误结构 第二步：判断空格后是否缺宾语 第三步：缺宾语用what，不缺用how/when等 第四步：核对主从句主语能否句式转换 高频易错点汇总 1. 误用why to do不定式结构 2. what后多余加宾语，造成语义重复 3. how后缺少宾语，句子成分残缺 4. 主语不统一，强行转换不定式句式 单项选择练习 1. I can’t decide ______ for the school trip. A. what take B. to take what C.what to take 2. Could you tell me ______ use this new dictionary? A. what to B. how to C. how 3. She doesn’t know ______ for help when she is in trouble. A. who to ask B. to ask who C. who ask 4. The problem is ______ finish the work on time. A. what to B. how to C. how C B A B 5. We haven’t decided ______ go for our picnic. A. why to B. where to C. where 6. Do you know ______ the meeting will start? A. when to B. when C. what to 7. I have no idea ______ next, so I need your advice. A. how do B. what to do C. what do 8. He will show us ______ choose suitable books. A. which to B. what to C. how to B A B C 短语选词填空练习 备选：what to do, how to act, when to leave, where to visit 1. My mom teaches me __________________ in public. 2. We are discussing __________________ during the summer holiday. 3. No one knows __________________ if the weather is bad. how to act where to visit what to do 补全句子练习 根据中文提示，完成Wh-词不定式结构 1. I don’t know ____________________ (如何准备) the exam. 2. She asks me ____________________ (带什么) to the party. 3. We decide ____________________ (何时出发) tomorrow morning. 4. The boy learns ____________________ (选择哪本书) to read. 5. Her question is ____________________ (去哪里) for weekend fun. 6. Teachers tell us ____________________ (做什么) in emergencies. how to prepare what to take when to leave which book to choose where to go what to do 句型转换练习 将宾语从句改为Wh-词+不定式结构 1. I don’t know where I should spend my holiday. 2. She can’t decide which book she will read. 3. Do you know what we can do in the park? 4. He wants to learn how he can improve his skills. 5. We wonder when we will hold the class meeting. I don’t know where to spend my holiday. She can’t decide which book to read. Do you know what to do in the park? He wants to learn how to improve his skills. We wonder when to hold the class meeting. 单句改错练习 1. I don’t know why to give up this plan. 2. She has no idea what to do it next. 3. Can you tell me how to prepare it? 4. Mum tells me what should I buy for dinner. 5. We discuss about where travel on weekends. 6. He wonders how do next with the problem. why to give up→why we give up what to do it→what to do（去掉it） 正确，无需修改 what should I buy→what to buy where travel→where to travel how do→what to do 对话填空综合练习 选用：what to learn, how to practice, when to review A: I’m worried about my English study. B: First, you need to know __________________ every day. A: And could you tell me __________________ my knowledge? B: You can ask teachers __________________ to improve your skills. what to learn when to review how to practice 核心解题技巧梳理 熟记禁忌：永远不用why to do结构 区分搭配：what无宾语、how必带宾语 转换前提：主从句主语必须保持一致 句式固定：疑问词+to do，语序不变 知识点小结1 基础结构 六大Wh-词可用，唯独why禁止搭配不定式 结构可作宾语、表语、主语三大成分 是简化宾语从句、优化句式的核心用法 知识点小结2 重难点辨析 what to do 独立完整，无需后续宾语 how to do 成分残缺，必须补充对应宾语 主语不一致时，禁止转换不定式句式 课堂整体总结 1. 完全掌握Wh-词+不定式全部基础用法 2. 攻克what/how辨析、why禁用两大难点 3. 熟练句式转换，规避全部高频错题 4. 适配全题型考查，夯实单元语法基础 教学课件 Unit3 语法专项 ——Wh-词+动词不定式 Thank you for listening! 27 $