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Unit 5 Power of Ideas 第3课时 Grammar Focus 4a~4c（语法课）
基本信息 课题：Unit 5 Power of Ideas — Grammar Focus 4a~4c 课型：语法课｜课时：1课时（45分钟）｜授课年级：九年级上册
核心素养目标 语言能力 观察并归纳一般现在时与一般过去时的被动语态结构，能正确使用 be + done 完成句子和语篇填空；掌握 melt、suppose、complete 等本课词汇。 学习能力 通过“观察例句—归纳规则—操练运用”的路径学习语法，借助语篇（青藏铁路）理解被动语态在真实语境中的用法。 思维品质 比较主动句与被动句的表达差异，体会何时用被动语态更合适。 文化意识 了解青藏铁路的建设成就，感受中国工程师在高原冻土上攻坚克难的智慧与精神。
教学重难点 教学重点 ①归纳被动语态“主语 + be + 过去分词 (+ by ...)”的肯定、否定结构；②完成 4b 单句填空和 4c 语篇填空；③正确判断时态并变形。 教学难点 ①根据时间状语和主语准确判断时态、选对 be 动词；②在青藏铁路语篇中灵活运用被动语态。
语言点
Language Points ①People all over the world are connected to each other through the internet. 全世界的人们通过互联网相互联系。（P45）all over the world 全世界（= around the world，句中作状语）；all over 遍布。拓展：all over China 全中国；all over the country 全国；all over the place 到处。例句：Mixue Ice Cream & Tea can be found all over the world. ②It wasn’t supposed to make such a loud noise when the button was pressed to start the machine. 按钮被按下启动机器时，本不该发出这么大的声响。（P45）be supposed to do/be sth 应当做（某事）/或是（某物）；例句：We’re supposed to avoid pushing when we go upstairs or downstairs. such a/an + adj. + 可数名词单数（such 表如此程度）；拓展 such + adj. + 名词复数/不可数名词。例句：This is such an interesting book that I read it twice.
教学环节 师生活动 活动观层次 评价要点
Step 1
Review & Lead-in ①话题导入：Who makes our desks Why can we say that ②师生互动：学生回答 Workers make desks. 教师顺势引出 Desks are made by workers.，点出今天要学的被动语态。 学习理解
感知与注意 话题导入与旧知激活
设计意图 从身边事物切入，让学生初步感知主动句与被动句的差别。
Step 2
Topic Vocabulary:
Present & Practice ①词汇呈现（音形义结合）：all over the world 全世界；suppose v. 认为；推断；be supposed to do/be sth 应当做；wheel n. 车轮；frozen adj. 冻硬的；冰封的；complete v. 完成；adj. 完全的；layer n. 层；表层；melt v.（使）融化；pipe n. 管道；tunnel n. 隧道；tourism n. 旅游业；gain v. 获得。 ②带读与感知：教师领读单词，结合例句体会词义。 ③检测：同桌互考认读与拼写，教师用听写快速检查。 学习理解
感知与注意 新词认读与拼写
设计意图 扫清青藏铁路语篇中的生词，为归纳语法和语篇填空做准备。
Step 3
Work on 4a:
Grammar Focus ①任务：Read the sentences. Circle the verbs in the passive voice. ②素材：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. ③教师活动：引导学生观察这些句子，找一找动词都由哪两部分构成。 ④学生活动：学生圈出被动语态动词，归纳“be + 过去分词”的结构。 应用实践
观察与发现 语法观察与操练
设计意图 在已学句子中观察、发现被动语态的形式，为归纳规则做铺垫。
Step 4
Work on 4b:
Grammar Practice ①任务：Complete the sentences with the correct forms of the verbs in brackets. ②素材：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. 4. It wasn’t supposed to make such a loud noise when the button ______ (press) to start the machine. 5. It is believed that the world’s oldest wheel ______ (find) in Eastern Europe。参考答案：was invented；are connected；was introduced；was pressed；is found。 ③教师活动：提醒学生先看时间状语判断时态，再选 be 动词、变过去分词。 ④学生活动：独立完成，同桌互查，错的说出理由。 应用实践
观察与发现 语法观察与操练
设计意图 通过单句操练巩固不同时态下被动语态的变形。
Step 5
Work on 4c:
Text Application ①任务：Complete the passage with the correct forms of the words in brackets. Make a profile of the Qinghai-Xizang Railway. ②素材：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 will help ______ (improve) transport in other similar places。参考答案：is connected；were needed；were used；be created；are built；are allowed；increased；(to) improve。 ③教师活动：先带学生通读语篇，了解青藏铁路建设的难点，再逐空点拨时态与语态。 ④学生活动：独立填空，完成后朗读整段，体会被动语态在说明文中的作用。 应用实践
观察与发现 语法观察与操练
设计意图 在真实语篇中运用被动语态，同时了解青藏铁路的建设智慧。
Step 6
Consolidation:
Diagnose & Fill Gaps ①独立完成：用所给单词的适当形式填空。1. Cheap fruit teas ______ (sell) at Mixue Ice Cream & Tea every day. 2. The first radio message ______ (send) across the Atlantic Ocean in 1901. 3. The light bulb ______ (invent) by Edison hundreds of years ago. 4. Mini cameras ______ (connect) to smart glasses now. 5. Small toys ______ (make) by 3D printers easily. 6. This kind of cooking machine ______ (use) in many restaurants last year。参考答案：1. is sold 2. was sent 3. was invented 4. are connected 5. are made 6. was used。 ②互查订正：同桌交换批改，用红笔订正，记录易错点。 ③精讲点拨：教师统计错误集中的题目当堂讲评，学生立即订正。 应用实践
内化与运用 练习正确率
设计意图 当堂检测被动语态的掌握情况，及时补上时态判断上的漏洞。
作业设计（分层） 基础 熟记本课词汇，整理被动语态肯定句、否定句的结构各写一个例句。 拓展 用被动语态写一段不少于 80 词的短文，介绍一项自己熟悉的发明是如何被制造或使用的。 探究 找两个汉语里“被”字句的例子，想想英语里什么时候要用被动语态，下节课分享。
板书设计 Unit 5 Power of Ideas — 第3课时 Grammar Focus 4a~4c 词汇：all over the world；suppose；be supposed to do；wheel；frozen；complete；layer；melt；pipe；tunnel；tourism；gain 被动语态：肯定句 主语 + am/is/are/was/were + done (+ by...)；否定句 主语 + be + not + done (+ by...) 活动链：4a 找被动 → 4b 单句填空 → 4c 青藏铁路语篇填空 主题：用被动语态介绍事物与发明
教学评价与反思 1. 评价方式（教-学-评一体化）： 语言能力——4b、4c 填空的正确率，be 动词时态与过去分词形式是否正确 学习能力——能否自己归纳被动语态规则，再运用于练习 思维品质——能否比较主动与被动句的表达差异 文化意识——能否体会青藏铁路建设背后的工程智慧 2. 课后反思：①是否先让学生观察例句再归纳；②时态判断是否在板书中强化；③语篇填空是否先读通读顺再填空；④分层作业是否便于检查。
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