Unit1 语法专项课件 2026-2027学年人教版九年级英语上册

该初中英语课件聚焦一般过去时与现在完成时辨析，通过对比“过去事实”与“联系现在的变化”例句（如“Ms Wu sold vegetables”与“Ms Wu has changed the way”）搭建学习支架，衔接时态规则、情境练习及主题任务，帮助学生建立知识脉络。 其亮点在于以真实语境（交通变化、环境改善等练习）和任务型活动（口语采访家乡变化、写作“Changes in My Life”）培养语言能力，通过“四步检查法”和易错辨析提升思维品质，课后“Then and Now”采访项目发展学习能力。学生能在实践中掌握时态，教师可依托结构化内容高效开展语法教学。

Unit 1 The Changing World 语法专项课件 一般过去时与现在完成时辨析 看时间 · 辨意义 · 用语境 人教版九年级英语上册 学习目标与课堂任务 02 本课目标 1. 区分过去的事实与联系现在的变化。 2. 结合时间和语境，使用正确的动词形式。 3. 用两种时态介绍家乡与个人生活的变化。 课堂任务 观察教材语境，完成练习，介绍一项真实变化。 语法导入：两句话，两种关注点 03 过去的事实 Ms Wu sold vegetables at a local market. 关注：吴女士过去在哪里卖菜。 联系现在的变化 Ms Wu has changed the way she farms. 关注：她的耕作方式已经发生变化。 同样谈变化，时态取决于说话人要表达什么。 单元主题：变化从何而来 04 What brings about changes? 家乡面貌 How has your hometown changed? 生活影响 How have the changes influenced local lives? 改变的行动 What did people do to make these changes? 语境观察：过去还是完成 05 圈出动词，并在横线上填写“过去”或“完成”。 1. 过去 Bob last visited the town about 20 years ago. 2. 完成 They haven't seen each other for ages. 3. 完成 The village has just built a hospital. 4. 过去 Many young people used to work in big cities. 5. 完成 More young people have come back. 6. 过去 Ms Wu grew vegetables on a small farm. 一般过去时：事实发生在过去 06 侧重过去的动作或状态，不强调现在的结果。 实义动词 肯定：主语 + 动词过去式 否定：主语 + didn't + 动词原形 疑问：Did + 主语 + 动词原形 ...? be 动词 肯定用 was / were，否定用 wasn't / weren't。 疑问句将 Was / Were 放在主语前。 例句：Did people travel far to see a doctor? 现在完成时：过去与现在相连 07 可以表达经历、结果，或持续到现在的情况。 have / has + 过去分词 肯定：Our village has changed a lot. 否定：They haven't seen each other for ages. 疑问：Have you been to the new library yet? 常见线索：already, yet, ever, never, since, for 辨析重点：动作的时间与意义 08 明确的过去时间 The old trains took ten hours to reach Nairobi. 描述旧铁路的出行情况，重点在过去。 到现在为止的结果 The new railway has cut the travel time. 说明新铁路带来的改变，重点在现在。 先确定所谈动作，再判断它与现在的关系。 常见时间线索 09 常见于一般过去时 yesterday last year two days ago in 2017 just now when I was a child 常见于现在完成时 already / yet ever / never so far since 2017 for years over the years 时间词提供线索，具体时态仍需结合语境。 时态判断：四步检查 10 1. 找时间 明确动作发生在过去，还是涉及到现在。 2. 看意义 判断表达过去事实、经历、结果或持续。 3. 定结构 选用过去式，或 have / has + 过去分词。 4. 查动词 检查主谓一致、不规则变化和动词原形。 基础练习：寻找时间线索 11 找出时间线索，判断主句时态，填“过去”或“完成”。 1. 过去 We visited the greenhouses last Sunday. 2. 完成 Our farm has changed a lot since 2020. 3. 过去 Grandpa worked by hand when he was young. 4. 完成 We have planted many trees so far. 5. 过去 Did the new library open last Friday? 6. 完成 He has lived here since he returned in 2019. 规则梳理：两种时态对比 12 一般过去时 意义：侧重过去的事实 结构：动词过去式 / was / were 例句：Ms Wu grew vegetables on a small farm. 时间线索：yesterday, ... ago, last ... 现在完成时 意义：强调与现在的联系 结构：have / has + 过去分词 例句：The village has become a tourist attraction. 时间线索：already, yet, since, for 先看时间，再看语境；不要只凭一个时间词判断。 易错辨析：完成时与过去时间 13 比较两种语境，再改正下面的误句。 I visited the new library yesterday. 明确说“昨天参观”，用一般过去时。 I have visited the new library before. 谈到目前为止的参观经历，用现在完成时。 误句：I have visited the library yesterday. have visited 改为 visited 持续到现在：since 与 for 14 since + 过去的时间点 They have planted trees since 2017. since 也可接从句：since he last visited for + 一段时间 They haven't seen each other for ages. for ages / for three years / for a long time 注意：for 只表示时长，不单独决定时态。 I worked there for three years before I moved. 过去的习惯：used to 15 used to + 动词原形 表示过去常常做某事，通常暗示现在已有变化。 过去 People used to travel far to see a doctor. 现在 The town has built a new hospital. 本结构中 to 后接原形：used to live / work / grow。 情境练习：交通变化 16 用所给动词的适当形式填空。 1.It took (take) half a day to reach the town 20 years ago. 2.Now it takes (take) only an hour. 3.The bus took (take) nearly 40 minutes when Li Rui was a child. 4.Roads have become (become) much better over the years. 5.We built (build) a new bridge last year. 6.People have used (use) this road since 2020. 情境练习：环境改善 17 用所给动词的适当形式填空。 1.There used to be (be) sandstorms in this area. 2.The villagers found (find) a useful bush years ago. 3.They worked (work) by hand in the beginning. 4.Locals have planted (plant) many trees since then. 5.This has improved (improve) local lives already. 6.The town has become (become) much greener so far. 情境练习：参观新图书馆 18 用所给动词的适当形式填空。 1.The library opened (open) last Friday. 2.I went (go) there with Grandpa last Saturday. 3.I read (read) digital books there that night. 4.Grandpa listened (listen) to audio books that night. 5.This is the best library I have ever visited (visit). 6.My brother hasn't been (not be) to the library yet. 情境练习：贵州交通的发展 19 用所给动词的适当形式填空。 1.It was (be) hard to travel in Guizhou in the past. 2.Most roads were (be) just dirt tracks then. 3.A journey used to take (take) a whole day. 4.Great changes have taken (take) place over the years. 5.The government has built (build) many new bridges. 6.Life has improved (improve) a lot since then. 基础练习：选择正确时态 20 选择最佳答案。 1.( A ) We ____ the corn fields yesterday. A.visited B.have visited C.has visited D.visit 2.( C ) The village ____ a lot since 2020. A.change B.changing C.has changed D.changed 3.( B ) Ms Wu ____ vegetables here years ago. A.grows B.grew C.growing D.has grown 4.( D ) Our town ____ a hospital already. A.built B.building C.build D.has built 易错练习：句子改错 21 每句有一处错误，改正后读出完整句子。 1. I have seen the new bridge yesterday. 改为： I saw the new bridge yesterday. 2. She has grow many vegetables this year. 改为： She has grown many vegetables this year. 3. Did they built this road in 2022? 改为： Did they build this road in 2022? 4. We live in this village since 2019. 改为： We have lived in this village since 2019. 主题词汇：描述变化 22 变化与发展 change, improve, develop, take place, bring about 环境与治理 sandstorm, soil, bush, root, sandy 交通与出行 railway, highway, bridge, tunnel, convenient 生活与生产 housing, e-payment, product, greenhouse 常用表达：把词汇放进句子 23 used to do 过去常常做 People used to work by hand. be covered with 被……覆盖 The hills used to be covered with sand. over the last ... years 在过去……年里 The town has changed over the last ten years. with ease 轻松地 People can travel between the cities with ease. bring about 带来，引起 Working together can bring about changes. 动词积累：不规则变化 24 原形 过去式 过去分词 be was/were been become became become build built built go went gone see saw seen 原形 过去式 过去分词 take took taken make made made have had had come came come do did done did 后用原形，have / has 后用过去分词。 口语任务：介绍家乡的一项变化 25 两人合作，一人采访，一人介绍。 A: What has changed most in your hometown? B: I think the ... has changed most. A: What was it like in the past? B: People used to ..., but now ... A: How has this change influenced local lives? 可选话题：交通、环境、住房、购物、医疗。 至少使用一句过去时和一句现在完成时。 写作任务：Changes in My Life 26 选取三项变化，最后写一件始终未变的事。 开头：点明生活发生了变化 My life has changed since primary school. 展开：对比学校、家庭或学习方式 I used to ..., but now I ... 补充：说明变化带来的结果 I have become more ... 结尾：写出未变的事 One thing has stayed the same: ... 随堂检测：语境中的时态 27 选择最佳答案。 1.( B ) I have read the report. I ____ it just now. A.am reading B.read C.have read D.reads 2.( B ) Many changes have ____ here over the years. A.take place B.taken place C.took place D.takes place 3.( A ) My uncle ____ in this village in 2015. A.lived B.has lived C.lives D.is living 4.( D ) We ____ the new railway yet. A.didn't use B.don't use C.won't use D.haven't used 随堂检测：家乡的今昔 28 用所给动词的适当形式填空。 1.My hometown has changed (change) a lot since 2018. 2.In the past, people went (go) to town by bus. 3.The trip took (take) nearly two hours then. 4.A new road has made (make) travel easier. 5.Many visitors have come (come) here so far this year. 6.We took (take) some photos of the town yesterday. 课后项目：Then and Now 29 采访父母或祖辈，记录他们与你同龄时的生活。 话题 Then Now 交通 购物 住房 感受 展示时先介绍过去，再说明变化与现在的生活。 用两种时态介绍变化，结尾说出自己的感受。 专项巩固：检查动词形式 30 用所给动词的适当形式填空。 1.Did the villagers plant (plant) trees last spring? 2.Our school has become (become) more beautiful. 3.We didn't have (not have) a computer years ago. 4.Grandpa used to work (work) on a small farm. 5.She has written (write) a report on these changes. 6.They saw (see) the greenhouses last weekend. 综合讲评：时间不能孤立判断 31 选择最佳答案。 1.( D ) She ____ here since she returned in 2019. A.worked B.works C.is working D.has worked 2.( A ) I ____ on that farm before I moved away. A.worked B.have worked C.work D.working 3.( C ) The journey ____ only an hour every day now. A.took B.has taken C.takes D.taking 4.( C ) She ____ many trees so far. A.planted B.plants C.has planted D.planting 课堂小结：用时态讲清变化 32 一般过去时 侧重过去发生的事实。 现在完成时 强调经历、结果或持续与现在的联系。 判断依据 结合动作的时间与语境，检查动词形式。 Change is the opportunity to create a better future. $