Unit5 Section A (4a-4c）课件 2026-2027学年人教版英语九年级上册

Unit 5 Power Of Ideas SectionA (4a-4c） 人教版 九年级上册 www.21cnjy.com 让教学更有效 By Yushen 感谢您下载第一PPT模板网提供的PPT模板。 01观察并分析 4a 例句，识别被动语态，归纳 be + 过去分词 的基本结构及一般现在时、一般过去时、一般将来时和情态动词的被动形式，理解主动语态与被动语态的区别。（学习理解） 02 完成 4b、4c 语法和语篇填空任务，根据时态和主语正确选择被动语态形式，并结合文本提取青藏铁路建设中的困难、解决办法及建设成效。（实践应用） 03运用所学被动语态介绍青藏铁路建设及其作用，结合冻土、野生动物通道等内容思考工程建设与生态保护的关系，感受我国基础设施建设和科技创新成就。（迁移创新） 教学目标 01 Lead-in Let’s learn Passive Voice together! 02 Presentation 4a Read the sentences. Circle the verbs in the passive voice. A mini-camera is connected to the front of the glasses. The oil and salt are also added by the machine itself. Toys, chairs, tables, and even houses can all be made by the 3D printer. A radio message was sent across the Atlantic Ocean for the first time in 1901. 1.被动语态的含义：主语被……，承受动作。 2. 基本结构：be + 过去分词 (done) 3.常用时态被动结构 • 一般现在时：am / is / are + done • 一般过去时：was / were + done • 一般将来时：will be + done • 情态动词被动：情态动词 (must / can / should) + be + done 主动语态和被动语态 Many people speak English. (主动语态) English is spoken by many people.(被动语态) 1.在主动语态中，句子的______是动作的 ________. 2.在被动语态中，句子的______是动作的 ______， 主语 执行者 承受者 主语 Passive Voice 7 be动词 + 动词的过去分词 被动语态的结构 The car is made in China. Knives are used for cutting things. The clothes were washed by my mother. 8 1. The classroom is cleaned every day. 2. These books are sold in this bookstore. 3. My bike is repaired by my father. 一、不同时态下的被动语态 1. 一般现在时am / is / are + 动词过去分词 1. The window was broken by Tom yesterday. 2. The letter was written last night. 3. A new school was built in our town last year. 2. 一般过去时 was / were + 动词过去分词 3. 一般将来时 will be + 动词过去分词 1. The work will be finished tomorrow.  2. A party will be held next week. 3. The problem will be solved soon.  11 被动语态的基本构成： be done 主语+be+过去分词+(by+宾语). 被动语态由“Be动词+动词的过去分词”构成，人称、数和时态的变化是通过_________的变化表现出来的。 be动词 主动语态变被动语态： 口诀： 主变宾，宾变主， 谓语be后过分词，然后再加介词by。 1. The Olympic Games every four years. A. are held B.were held C.are holding D.will hold 2. Today Chinese __________ by more and more people around the world. A. was spoken B. is spoken C. spoke D. speak 1. The old bridge ______ (build) in 1980. 2.These letters ______ (send) to their owners yesterday. 3.The house ______ last month. A. paint B. painted C. was painted D. is painted 1. A new library ____________ in our school next year. A. builds B. will build C. will be built D. is built 2. The problem ____________ in the meeting tomorrow. A. discusses B. is discussed C. will discuss D. will be discussed 3. Many trees _____________ in the mountains in the future. A. plant B. will plant C. are planted D. will be planted 4b Complete the sentences with the correct forms of the verbs in brackets. 1. The telephone ___________ (invent) by Alexander Bell in 1876. 2. People all over the world _____________ (connect) to each other through the internet. 3. The word “ robot ” ______________(introduce) for the first time in a play in 1920. was invented are connected was introduced 4. It wasn’t supposed to make such a loud noise when the button ____________ (press) to start the machine. was pressed 5. It is believed that the world’s oldest wheel ____________ (find) in Eastern Europe. was found Ancient Chinese Engineering and Products （中国古代工程与物产） 用被动语态操练 was + done，增强文化自信 The Great Wall （长城） The Great Wall was built over 2,000 years ago. （长城建于两千多年前） A symbol of protection and perseverance The Grand Canal （大运河） The Grand Canal was built to connect the north and south. （大运河开凿以连接南北） A waterway for transport, trade and culture Porcelain （瓷器） Porcelain was made in Jingdezhen. （瓷器产自景德镇） A famous product of Chinese craftsmanship Grammar focus: was built / was built / was made 中国古代工程与物产体现了中华文明的创造力。 动画建议：三张卡片从左到右依次淡入；每张卡片中的英文句子可逐条出现；底部语法总结最后出现。 教师备注：本页以长城、大运河和景德镇瓷器为例，让学生用被动语态操练 was + 过去分词，同时感受中国古代工程与物产的文化价值。可引导学生思考：这些工程和物产为什么能成为中华文明的重要象征，从而增强文化自信。 Where is it? The Qinghai-Xizang Railway. Today, we will learn about it. 全长 1956 公里，分西宁 — 格尔木、格尔木 — 拉萨两段，2006 年 7 月 1 日全线通车； 世界海拔最高、线路最长高原铁路，最高点唐古拉山口海拔 5072 米； 攻克冻土、高寒缺氧、生态脆弱三大世界级难题，设置野生动物迁徙通道； 通车 20 年累计运送旅客超 1 亿人次、货物超 1 亿吨，带动西藏经济、旅游，促进民族团结； 新世纪四大工程之一，被誉为 “天路”，是中国基建标志性成就。 青藏铁路The Qinghai-Xizang Railway, also known as the "Sky Road 4c Complete the passage with the correct forms of the verbs in brackets. Make a profile of the Qinghai-Xizang Railway. The Qinghai-Xizang Railway was completed in 2006. It ________ (connect) Xining to Lhasa, a huge distance of 1,956 kilometres, and it is the highest railway in the world, reaching 5,072 metres above sea level at Tanggula Pass. The building of the railway was a great challenge. Creative ideas ___________ (need) to solve different problems. In summer, the top layer of the frozen ground would melt and become too soft to build on, so pipes _________ (use) to keep the ground hard. However, in some places, it was impossible to build the railway over the frozen ground, so tunnels had to __________ (create) instead. In some other places, bridges ___________ (build) to keep the railway up above the ground. These bridges are animal-friendly and ________ (allow) animals to pass under the tracks. As an important and successful project, the railway has ________ (increase) tourism and economic development in the area. The lessons learnt and experience gained from building this railway will help ________ (improve) transport in other similar places in the world. connects were needed were used be created were built allow increased improve Grammar Toolkit： 被动语态结构表 时态 被动结构 例句 一般现在 am / is / are ＋ done Paper is made from wood. 一般过去 was / were ＋ done The telephone was invented by Bell in 1876. 一般将来 will be ＋ done A new library will be built next year. 情态动词 can / must ＋ be ＋ done Toys can be made by the 3D printer. 主动变被动五步：找宾语→变主语→定 be 的单复数→定时态变 be→动词变过去分词（原主语放 by 后）。 常见不规则过去分词：make→made, send→sent, build→built, find→found, use→used, produce→produced, create→created, invent→invented。 Summary 1. New words: telephone, suppose, wheel, frozen, eastern, layer, melt, pipe, tourism, economic, gain 2. Expressions: all over the world, be supposed to do / be sth 3. Sentences: ① It is believed that the world’s oldest wheel was found in Eastern Europe. ② It was impossible to build the railway over the frozen ground. Homework 01.Must do 02.Choose to do 搜集一条关于青藏铁路的英文短句并改成被动语态。 用被动语态结构（be+V-过去分词）写5个句子。 1.7.2013 Here is your homework for today. Please complete the written and oral tasks. Remember to practice speaking as much as you can. This will help you become more confident. ‹#› $