Unit 1 The Changing World Section A (4a～4d) 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一般过去时、现在完成时及used to do用法，通过“旧知回顾”对比时态定义、结构与标志词，结合动词过去分词规则，以圈动词辨时态任务导入，搭建从旧知到新知的学习支架。 其亮点在于用时间轴可视化语法点，突破标志词混淆、延续性动词等易混点，设计语境化对话与短文填空练习，联系家乡变化现实主题。运用语言能力（语境表达）、思维品质（分析对比）和学习能力（策略指导），如提示“划标志词看前后句”助学生掌握方法，提升学生时态运用能力，也为教师提供系统教学资源。

Unit 1 The Changing World Section A (4a~4d) 1. 能区分一般过去时和现在完成时，明确说出其定义、结构、标志词； 2. 能总结出used to do 含义、用法并能在合适的情境中运用； 3. 正确完成时态综合习练 Learning objectives Review 旧知回顾：过去式和现在完成时区别 一般过去时 1. 定义①过去某个时间发生的动作或存在的状态，常和表示过去的时间状语连用; ②也可以表示过去经常或反复发生的动作，常和表示频率的时间状语连用。 2. 结构：主+was/were+... 主+动词过去式+... 常见时间状语: yesterday, just now, last + 时间，时间+ ago，that+时间，once upon a time, in the past, 介词 +过去时间 等。 现在完成时 1.定义： ①过去发生或已经完成的动作对现在造成的影响或结果； ②从过去某一时间开始并持续到 现在的动作或状态。 2. 结构： 主语 + have/has + 过去分词 + ... 常见时间状语: ever, never, just, before, already, yet, for +时间段, since, so far, recently , since then, up to/till now, in the past few years等。 过去式变化规则 变化规则 举例 1 直接加-ed look - looked 2 以e结尾，直接加-d live - lived 3 以辅元辅结尾的重读闭音节，双写最后一个字母再加-ed stop—stopped 4 辅音+ y结尾，变y为i, 加-ed study-studied 5 不规则变化 see-saw have-had 过去分词 规 则 变 化 规则变化同过去式，但不规则需要单独记忆 AAA型 put-put-put cost-cost-cost set-set-set hit-hit-hit ABB型 find-found-found buy-bought-bought stand-stood-stood catch-caught-caught ABC型 take-took-taken fly-flew-flown write-wrote-written break-broke-broken ABA型 become-became-become run-ran-run come-came-come 常见不规则过去分词变化规律 He became a good friend of your grandfather about 20 years ago. They haven’t seen each other for ages! We used to have to travel far to see a doctor. Our village has just built a new hospital. Many people used to work in big cities. Now, more of them have come back to live and work here. Circle the verbs（动词） and tell the tenses(时态). 一般过去时 此处 表“到现在为止” Engagement 一般过去时 大约20年前，他成为了你祖父的一位好朋友。 他们已经很多年没见过彼此了！ 我们过去常常要走很远的路去看医生。 我们村刚建了一家新医院。 很多人过去在大城市工作。 现在，他们中的更多人已经回到这里生活和工作。 现在完成时 （3）一般疑问句 Did+主语+ use to do sth.?/Used+主语+ to do sth.? Exploration （1）肯定句 主语+used to do sth. （2）否定句 主语+didn’t use to do sth./主语+usedn’t to do sth. Used to He didn’t use to like coffee. =He usedn’t to like coffee. Did he use to like coffee? =Used he to like coffee? Yes, he did./No,he didn’t. 观察与总结 主语 + have / has + done 1.主语+be(were,was) 2.主语 + 动词过去式 一般过去时 现在完成时 1.主语 + be (am, is, are) 2.主语 + 动词原形/单三 NOW 一般现在时 Grammar rules 【主语 + used to+动词原形】 过去习惯/状态（现在已改变） Explanation TIME Explanation 易混易错点突破 易错点1：标志词混淆 ×错误：I have seen him yesterday.（“yesterday”是具体过去时间，不能用现在完成时） √正确：I saw him yesterday. 易错点2：非延续动词与延续性动词 现在完成时中，非延续性动词（如buy，die，leave，open）不能直接与for/since连用，需转换为延续性状态 易错点3：when与how long的提问区别 when提问具体时间，用一般过去时： When didyou open the door? ——I opened it just now. how long提问持续时长，用现在完成时： How long have you kept this book? ——For two weeks. A: ______ you ______ (be) to the new library yet? B: No, I ______________ (not know) there was a new library. When did it ______ (open)? A: It ____________ (open) last Friday. I _____________ (go) there with my grandpa on Saturday night. B: ______ you ______ (like) it? A: Of course! It’s the most high-tech library I __________ ever __________ (visit). B: Oh, what ______ you ______ (see) there? A: There are sections with books about science and Chinese culture, as well as a huge section with children’s books. I also ______ (read) some digital books on the computer. My grandpa _____________ (listen) to some audio books because he can’t see well. B: Cool! I ________________ (bring) my little brother there tomorrow. Complete the conversation with the correct forms of the verbs in brackets(空). Have been didn’t know open opened went Do like have visited did see read listened will bring 对过去不知道某事的陈述 关于科学和中国文化的书籍 有声读物 have been to… 去过某地（现在已经回来） 询问现在的感受 read 的过去式还是 read Tips: 先划标志词，再看前后句 Evaluation Complete the passage with the correct forms of the verbs in brackets. Why are local people richer and happier than before? In the past, it ______ (be) difficult to travel in Guizhou. In many places, there used to ______ (be) no bridges to cross over mountains and rivers, and most roads were just dirt tracks. This ______ (make) it difficult for locals to bring products to the market or to develop industry. Now great changes ____________ (take) place. The government ___________ (build) thousands of kilometres of highways, railways, and wide roads. It has also built many high bridges over mountains and rivers. 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). was be made have taken has built take have improved were make it + adj. + to do sth.使做某事… 强调对现在的影响 Tips: 先划标志词，再看前后句 Evaluation People’s hard work and the support of the government. eg：Parents have worked hard to offer us a good learning environment and more educational opportunities. Teachers guide us to learn knowledge and to be good people/tpo shape moral values(道德观念). We ourselves matter most. Who made the changes possible? Who has big influences to help us change better? Elaboration 现在完成时 vs 一般过去时 一般过去时 (Simple Past) 现在完成时 (Present Perfect) 强调“过去的事实” 动作发生在过去，与现在无关。只陈述过去发生过这件事。 标志词：yesterday,last week, in 1990, just now, when I was young... 强调“对现在的影响” 动作发生在过去，但对现在有影响或结果；或动作延续到现在。 标志词： already, yet, ever, never, just, before, so far, since, for... 注意： 1. 看到 yesterday, ago, last... 铁定选一般过去时。 2. 看到 for / since，优先考虑现在完成时 (注意动词是否延续)。 3. 句中有 just now (刚才) 用过去时；只有 just (刚刚) 常用于完成时。 Summary 主语 + have / has + done 1.主语+be(were,was) 2.主语 + 动词过去式 一般过去时 现在完成时 1.主语 + be (am, is, are) 2.主语 + 动词原形/单三 NOW 一般现在时 【主语 + used to+动词原形】 过去习惯/状态（现在已改变） TIME Summary $