Unit1 SectionA 4a-4c 公开课课件2026-2027学年人教版英语九年级上册

该初中英语课件聚焦Unit 1 The Changing World的Section A 4a-4c，核心知识点为used to、一般过去时及现在完成时。课堂通过U2歌曲音频导入，从歌词感知现在完成时，结合4a练习复习巩固，再以Grammar Map梳理三种时态定义、结构及标志词，构建从感知到理解的学习支架。 其亮点在于融合语言能力与思维品质培养，如用贵州交通变化短文创设真实语境，通过对比表格区分一般过去时与现在完成时标志词，小组活动要求用三种时态谈论家乡变化。这既提升学生语法应用与表达能力，又培养分析比较思维，教师可直接使用结构化内容与活动设计，高效开展语法教学。

Unit 1 The Changing World Section A 4a–4c · 时态语法课 used to · 一般过去时 · 现在完成时 1 Learning Goals 本节课，你将能够… 📖 掌握 used to 的用法 描述过去的习惯或状态，且强调现在已改变。 ⏳ 区分一般过去时与现在完成时 能根据时间标志词判断并正确选用时态。 💬 用三种时态谈论家乡变化 在真实语境中流利表达生活的变化。 ✍️ 完成 4a / 4b / 4c 练习 正确填写动词形式，巩固语法知识。 Unit 1 The changing world · Section A 4a-4c 2 2 Warm-up What tenses can you hear in this song? "I Still Haven't Found What I'm Looking For" — U2 I have climbed the highest mountains, I have run through the fields… But I still haven't found what I'm looking for. 🎵 思考：歌词里出现了哪些时态？ have + 过去分词 → 现在完成时！ Unit 1 The changing world · Section A 4a-4c 3 3 Let's Review 4a 用括号内所给动词的适当形式填空 1. He ________ (become) a good friend of your grandfather about 20 years ago. became 2. They ________ (not, see) each other for ages! haven't seen 3. We ________ (use) to have to travel far to see a doctor. used 🔍 提示：圈出每句的时间标志词，判断时态！ Unit 1 The changing world · Section A 4a-4c 4 4 Let's Review 4a 用括号内所给动词的适当形式填空 1. Our village ________ (build) a new hospital. has (just) built 2. Many people ________ (use) to work in big cities. used 3. Now, more of them ________ (come) back to live and work here. have come 🔍 这 6 句话共同讲述：乡村的变化（the changing world） Unit 1 The changing world · Section A 4a-4c 5 5 Grammar Map 三种时态，一把钥匙 一般过去时 Simple Past 过去某时发生的动作 became / visited used to used to + 动词原形 过去的习惯（现已改变） used to work 现在完成时 Present Perfect 过去动作影响现在 has built / have seen Unit 1 The changing world · Section A 4a-4c 6 6 Simple Past 一般过去时 定 义 表示过去某个时间或某段时间内发生的动作或存在的状态。 动词结构 动词过去式 (did) become → became visit → visited Past 过去 ◄———————► Now 现在 ◄———————► Future 未来 ▲ 一般过去时 Unit 1 The changing world · Section A 4a-4c 7 7 Simple Past 一般过去时的标志词 ⏰ yesterday 昨天 ⏰ last week / month / year 上周 / 上月 / 去年 ⏰ … ago （一段时间）以前 ⏰ the day before yesterday 前天 ⏰ in + 过去年份 在……年 ⏰ just now 刚才 Unit 1 The changing world · Section A 4a-4c 8 8 Present Perfect 现在完成时 构 成 have / has + 过去分词 have built · have seen has come · has taken 两种用法 ① 过去的动作对现在造成影响或结果。 ② 动作/状态从过去持续到现在，还可能继续。 Past 过去 ◄——— 动作持续 / 影响 ———► Now 现在 ▲ 现在完成时（关注现在） Unit 1 The changing world · Section A 4a-4c 9 9 Present Perfect 现在完成时的标志词 already 已经 yet 还；已经 never / ever 从不 / 曾经 just 刚刚 so far 到目前为止 for + 时间段 持续…… since + 时间点 自从…… 💡 记住：现在完成时不与具体的过去时间（yesterday、last week）连用！ Unit 1 The changing world · Section A 4a-4c 10 10 Compare 一般过去时 vs 现在完成时 一般过去时 Simple Past 只强调过去，与现在无关 标志：yesterday, last week, just now, … ago, in 2008 VS 现在完成时 Present Perfect 强调过去动作对现在的影响 标志：already, yet, never, ever, just, so far, for, since Unit 1 The changing world · Section A 4a-4c 11 11 used to used to + 动词原形 含 义 表示“过去常常……（现在已不这样）”， 强调过去与现在的对比。 例 句 People used to work in big cities. ⚠️ 注意： used to 后面接动词原形，只描述“已结束的过去习惯”，不能与现在完成时混用。 Unit 1 The changing world · Section A 4a-4c 12 12 Practice 即时小练习：选出正确时态 1. I ______ this movie last weekend. A. have seen B. saw C. has seen B 2. She ______ her hometown for three years. A. left B. has left C. has been away C 3. We ______ to school by bike, but now we walk. A. used to go B. use to go C. have gone A （答案点击前先让学生思考哦！） Unit 1 The changing world · Section A 4a-4c 13 13 Exercise 4b 补全对话：新图书馆 A: ______ you ______ (be) to the new library yet? Have … been B: No, I ______ (not know) there was a new library. When did it ______ (open)? didn't know / open A: It ______ (open) last Friday. I ______ (go) there with my grandpa on Saturday night. opened / went 💡 yet → 现在完成时疑问句；last Friday / Saturday night → 一般过去时 Unit 1 The changing world · Section A 4a-4c 14 14 Exercise 4b 补全对话：新图书馆（续） B: ______ you ______ (like) it? A: Of course! It's the most high-tech library I ______ ever ______ (visit). Did … like / have … visited B: Oh, what ______ you ______ (see) there? A: I ______ (read) some digital books. My grandpa ______ (listen) to audio books. did … see / read / listened B: Cool! I ______ (bring) my little brother there tomorrow. will bring / am going to bring 💡 ever → 现在完成时；tomorrow → 一般将来时 (will / be going to) Unit 1 The changing world · Section A 4a-4c 15 15 Language Point as well as vs as well 对比项 as well as as well 含义 除……之外，也；还 也；还 位置 位于所连接的两个成分之间 通常位于句尾 用法 连接对等成分，强调前面信息 无侧重，用于补充信息 例句：Tony as well as his friends is from England. （谓语动词与前面的主语一致） Unit 1 The changing world · Section A 4a-4c 16 16 Exercise 4c 短文填空：贵州的交通变化 In the past, it ______ (be) difficult to travel in Guizhou. In many places, there used to ______ (be) no bridges to cross mountains and rivers, and most roads were just dirt tracks. was / be This ______ (make) it difficult for locals to bring products to the market or to develop industry. made 贵州：天堑变通途 贵州位于中国西南，群山连绵，过去出行极为困难。如今，这里架起了一座座世界级高桥。 Unit 1 The changing world · Section A 4a-4c 17 17 Exercise 4c 短文填空：贵州的交通变化（续） Now great changes ______ (take) place. The government ______ (build) thousands of kilometres of highways, railways, and wide roads. have taken / has built A journey that used to ______ (take) a day now takes only a few hours. As a result, the lives of local people ______ (improve). They are much richer and happier than they once ______ (be). take / have improved / were 为什么当地人更富裕、更幸福了？ 因为交通改善 → 经济发展 → 生活水平提高。 Unit 1 The changing world · Section A 4a-4c 18 18 Read & Compare 过去 vs 现在：读一读，找出答案 过去 Past ▪ It was difficult to travel. ▪ There used to be no bridges. ▪ Most roads were dirt tracks. 现在 Now ▪ Great changes have taken place. ▪ The government has built many roads. ▪ Local people are richer and happier. Unit 1 The changing world · Section A 4a-4c 19 19 Key Words 重点词汇与短语 take place 发生；进行（不及物） thousands of 数以千计的；成千上万的 as a result 因此；结果 dirt track 泥土小路 wide roads 宽阔的公路 bring … to 把……带到…… Unit 1 The changing world · Section A 4a-4c 20 20 Group Work Talk about the changes in your hometown 1 两人一组 Work in pairs 2 选择话题 交通 / 住房 / 教育 / 环境 3 运用语法 used to + 一般过去时 + 现在完成时 4 上台展示 Role-play & present People used to … · Now the government has built … · Our lives have improved. Unit 1 The changing world · Section A 4a-4c 21 21 Let's Talk 说一说：我的家乡变化 In the past, my hometown used to be very quiet. People used to walk to the town. Now great changes have taken place. The government has built many new roads. Our lives have improved a lot. 参考句型：used to do · have/has + 过去分词 · did（一般过去时） Unit 1 The changing world · Section A 4a-4c 22 22 Summary 课堂小结 ✓ 一般过去时 过去动作，标志：ago / last… / yesterday ✓ used to 过去习惯（现已改变），后接动词原形 ✓ 现在完成时 过去影响现在，标志：yet / ever / for / since 用三种时态，讲述身边的变化！ Unit 1 The changing world · Section A 4a-4c 23 23 Homework 课后作业 📝 完成课本练习 复习本课语法笔记，完成配套练习册相关题目。 ✍️ 写一篇短文 用 used to、一般过去时、现在完成时各写 2 句话，介绍家乡或学校的变化。 🎤 准备口语展示 下节课上台用英语介绍你身边的一处变化。 Unit 1 The changing world · Section A 4a-4c 24 24 Thank You! See you next time! 25 $