Unit 1 第3课时 Section A 4a-4c-【七彩课堂】2026-2027学年九年级上册英语同步课件（人教版·新教材）

The Changing World Section A 4a-4c Objectives To learn new words: digital, dirt, wide … To compare simple past tense and present perfect tense. To complete the conversation/passage with the correct forms of the verbs in brackets in 4b and 4c. 1a Read the sentences and circle the verbs. Pay attention to the verb tenses. Grammar Focus 语法聚焦 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. 现在完成时态 (Present perfect tense) 现在完成时的逻辑是“过去发生，影响现在”，基本形式是“have/has + 过去分词”。 用have还是has取决于前面的主语。主语是第三人称单数，用has；主语是其他人称，用have。 其否定形式为“haven’t/hasn’t + 过去分词”。 现在完成时的常见用法 1. 现在完成时表示影响或结果 2. 现在完成时表示持续 3. 现在完成时表示重复动作 现在完成时的常见用法 1. 现在完成时表示影响或结果 现在完成时跨在两个时间之上，一是过去，一是现在。它的动作发生在过去，但对现在有影响或结果，而这种影响或结果却往往是说话人的兴趣所在，所以常常后面不用时间状语。 例句：Someone has broken the window. 有人把窗户打破了。 Have you ever seen the sea? 你看见过大海吗？ 过去发生 影响现在 2. 现在完成时表示持续 现在完成时常用来表示持续的动作或状态。这种表示持续动作或状态的动词多是无限动词，如： live、 study、 teach、 be、 wait等。现在完成时表示持续的动作或状态时，常和since或for引导的短语连用。 例句：I have lived here for more than ten years. 我已在这里住了十多年。   I have been here since last October. 从去年十月起，我一直在这里。 3. 现在完成时表示重复动作 现在完成时可以表示过去重复的动作，常与always、 often、 many times、 every day等连用。 例句： My father has always gone to work by bike. 我父亲一向骑车上班。  — How often have you seen her? 你见过她多少次了？ — Oh, hundreds of times. 噢，上百次了。 现在完成时的常见搭配 1. 现在完成时与时间状语连用 2. 现在完成时与since连用 3. 现在完成时与一般过去时的 when/while从句连用 现在完成时的常见搭配 1. 现在完成时与时间状语连用 现在完成时可以和包括“现在时刻”在内的时间状语连用，如： now、 today、 this week、 this month等。 例句：The rain has stopped now. 雨终于停了。   Have you seen John today? 你今天见过约翰吗？ 注意：现在完成时通常不可和具体的表示过去的时间状语连用，如： just now、 a minute ago、 yesterday、 last year等，但可以和 just、 recently、 before、 never、 so far等笼统地表示过去的时间状语连用。 2. 现在完成时与since连用 现在完成时表示持续性时可与since以及since引导的 短语或从句连用。 例句：Nothing has happened since. 从那以后未发生什么事。   I have learned a lot from him since I have known him. 自从我认识了他，我向他学到许多东西。 3. 现在完成时与介词短语连用 现在完成时可以和before、 after、 during、 from、 in 等介词引导的短语连用。 例句： I have learned a lot during the year. 这一年来我学到很多东西。  I have read quite a bit in the past few days. 近日我读了不少书。 4. 现在完成时与一般过去时的when/while从句连用 例句： I haven’t studied English when I was at school. 我上学时没有学过英语。   Have you been here while I was out? 你在我出去时来过这里吗？ 4b Complete the conversation with the correct forms of the verbs in brackets. 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）.  Have been didn’t know open opened went Did like have visited 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. did see read listened /am going to bring will bring 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 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 Now great changes _________（take） place. The government _________（build） thousands of kilometres of highways, railways, and wide roads. It has also built many bridges and tunnels. 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）. have taken has built take have improved were The government ________（build） thousands of kilometres of highways, railways, and wide roads. 政府（修建）数千公里的公路、铁路和宽阔的道路。 Language points wide /waɪd/ adj. 宽的；宽阔的 例句：There is a wide river in our village. 我们村有一条宽阔的河。  It’s too wide. We can’t swim across. 这太宽了，我们游不过去。 拓展：wider是wide的比较级，意为“更宽的”。 widest是wide的最高级，意为“最宽的”。 例句：The wider problem remains. 更广泛的问题依然存在。 We are talking about education in its widest sense. 我们在讨论最广义的教育。 2. Our village has become a tourist attraction. 我们村已经变成了一个旅游景点。 例句： Buckingham Palace is a major tourist attraction. 白金汉宫是重要的旅游胜地。   The main attraction at Giverny is Monet’s garden. 吉维尼主要的景点是莫奈花园。 attraction /əˈtrækʃn/ n. 向往的地方；吸引力 例句： I had always been attracted by the idea of working abroad. 我总是向往去国外工作。 拓展：attract 作动词，意为“吸引；使喜爱；引起……的 好感（或爱慕）”。 3. Have these changes greatly improved your lives? 这些变化极大地改善了你们的生活吗？ 例句： People’s reaction to the film has varied greatly. 人们对这部影片的反应大不一样。   Your help would be greatly appreciated. 如蒙帮助，感激不尽。 greatly /ˈɡreɪtli/ adv. 大大地；非常 例句： The concert had been a great success. 音乐会非常成功。 You've been a great help. 你帮了大忙。 拓展： great作形容词，意为“非常的；极大的”。 Exercise 将下列句子改为现在完成时。 1. They finished their homework yesterday evening. They ______ _______ their homework. 2. The movie started 2 months ago.   The movie ______ ______ on for 2 months. 3. I began to study English ten years ago. I ______ ______ studying English ______ ten years. have finished has been have been for Homework Make five sentences using present perfect tense. Remember the new words in 3a. Use them to make sentences. 伴你成长 $