Unit 1 The Changing World Section A Grammar focus 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、used to和现在完成时的区分与正确使用，通过认读例句圈划动词、对比时态特征，搭建“观察-归纳-应用”的学习支架，帮助学生建立“过去vs现在”的时态对比脉络。 其亮点在于以“变化的世界”为主题语境，通过4b图书馆对话填空和4c贵州交通变化短文填空，融合语言能力培养，让学生在真实语境中运用时态。通过对比三种时态的时间关联，提升思维品质中的分析比较能力，总结部分清晰的结构公式助力学习能力提升，既帮助学生巩固语法知识，也为教师提供高效教学工具。

Unit 1 The Changing World Section A Grammar Focus 九年级上册-李 能够区分并正确使用一般过去时、used to 和现在完成时； 能在对话和短文中根据时间状语和语境选择正确的动词形式； 理解时态变化如何体现“过去vs现在”的对比。 Read the sentences and circle the verbs. Pay attention to the verb tenses. He became a good friend of your grandfather 20 years ago. We used to have to travel far to see a doctor. Many people used to work in big cities. They haven’t seen each other for ages! Our village has just built a new hospital. Now, more of them have come back to live and work here. 4a 一般过去时 现在完成时 When do we use the simple past tense? When do we use the present perfect tense? 一般过去时 表示过去某个时间或某一段时间内发生的动作或存在的状态，常和表示过去的时间状语连用，如 yesterday、last night、in 1990、two days ago 等。 现在完成时 ①表示过去发生或已经完成的动作对现在造成的影响或结果。 ②表示某一动作或状态从过去某一时间开始一直持续到现在，并有可能持续下去。 1. 一般过去时（Simple Past） 只描述过去，和现在切断联系 动作发生、结束在明确的过去时间，单纯陈述一件往事，不关心对当下有无影响。 2. 现在完成时（Present Perfect） 连接过去与现在 动作起点在过去，但落脚点是现在，要么强调当下结果，要么动作持续到此刻。 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. 4b. Complete the conversation with the correct forms of the verbs in brackets. Have been didn't know open opened went Do like have visited did see read listened will bring have been to 去过某地(已经回来) have gone to去了某地(还未回来) have been in 已经在…多久了(现在还在) 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. 4b. Complete the conversation with the correct forms of the verbs in brackets. Have been didn't know open opened went Do like have visited did see read listened will bring 也 最高科技的 数字书，电子书 有声书 4c. 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. was be made 土路 发展工业 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). take have improved were have taken has built 结果，因此 Summary 一般过去时（过去特定时间） ①be 动词：主语 + was/were ②实义动词：主语+动词过去式 现在完成时（影响现在，无具体过去时间） ①主语 + have/has + 动词过去分词 (done) used to do（过去常做，现在不） ①主语 + used to + V原 有过去具体时间 → 一般过去时 过去习惯今不同 → used to do 动作影响到现在 → 现在完成时 Homework Review the grammar of this lesson and know how to use simple past tense and present perfect tense in different contexts correctly. Do some related exercises to consolidate. $