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(共29张PPT)
Unit 5 Power Of Ideas
SectionA (4a-4c）
人教版 九年级上册
By Yushen
感谢您下载第一PPT模板网提供的PPT模板。
一、语言能力
掌握生词：telephone, suppose, wheel, frozen, eastern, layer, melt, pipe, tourism, economic, gain
掌握核心语法：不同时态被动语态结构（一般现在 / 过去 / 将来、情态动词被动）；主动变被动转换规则
能读懂、完成填空习题，能用被动语态造句、描述青藏铁路相关内容
二、学习能力
学会归纳语法规则，自主区分主动 / 被动语态
借助文本、图片提取信息，完成语篇填空任务
小组合作核对答案、互相纠错
三、文化意识
了解青藏铁路（天路）工程成就，认识我国高原基建、生态保护、区域经济发展成果，增强民族自豪感。
四、思维品质
对比主动、被动语态差异，梳理时态被动变化逻辑；结合冻土、野生动物通道素材辩证思考工程建设与生态保护的平衡。
教学目标
教学重难点
重点
被动语态核心结构：be + 过去分词 (done)
四大常用时态被动句式：
一般现在：am/is/are + done
一般过去：was/were + done
一般将来：will be + done
情态动词：can/must/should + be + done
主动语态变被动语态步骤
难点
根据时态、主语单复数正确变换be 动词形式
被动语态在真实语篇（青藏铁路短文）中的综合运用
telephone / tel f n/ n. 电话
suppose /s p z/ v. 认为；推断
wheel /wi l/ n. 车轮；轮子
frozen / fr zn/ adj. 冻硬的；冰封的
eastern / i st n/ adj. 东部的；向东的
layer / le (r)/ n. 层；表层
melt /melt/ v. （使）融化；逐渐消失
pipe /pa p/ n. 管道；管子；烟斗
tourism / t r z m/ n. 旅游业
economic / i k n m k/ adj. 经济的；经济学的
gain /ɡe n/ v. 获得；取得
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
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.
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.
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.划分句子成分，找宾语———确定动作的承受者，变为被动语态中的主语；
2.判断宾语的单复数———确定be的单复数；
3.判断动词的时态———确定be的时态；
4.修改谓语的形式———将原句动词变成对应的过去分词；
5.修改原句的主语———将原来的主语变为“by+宾语”。
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
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
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.
被动语态的基本构成：
be
done
主语+be+过去分词+(by+宾语).
Summary
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
1.划分句子成分，找宾语———确定动作的承受者，变为被动语态中的主语；
2.判断宾语的单复数———确定be的单复数；
3.判断动词的时态———确定be的时态；
4.修改谓语的形式———将原句动词变成对应的过去分词；
5.修改原句的主语———将原来的主语变为“by+宾语”。
Homework
01.Must do
02.Choose to do
用用被动语态结构（be+V-过去分词）写5个句子。
1. Memorize the new words and phrases.
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一、教学目标
（一）语言能力
掌握生词：telephone, suppose, wheel, frozen, eastern, layer, melt, pipe, tourism, economic, gain
掌握核心语法：不同时态被动语态结构（一般现在 / 过去 / 将来、情态动词被动）；主动变被动转换规则
能读懂、完成填空习题，能用被动语态造句、描述青藏铁路相关内容
（二）学习能力
学会归纳语法规则，自主区分主动 / 被动语态
借助文本、图片提取信息，完成语篇填空任务
小组合作核对答案、互相纠错
（三）文化意识
了解青藏铁路（天路）工程成就，认识我国高原基建、生态保护、区域经济发展成果，增强民族自豪感。
（四）思维品质
对比主动、被动语态差异，梳理时态被动变化逻辑；结合冻土、野生动物通道素材辩证思考工程建设与生态保护的平衡。
二、教学重难点
重点
被动语态核心结构：be + 过去分词 (done)
四大常用时态被动句式：
一般现在：am/is/are + done
一般过去：was/were + done
一般将来：will be + done
情态动词：can/must/should + be + done
主动语态变被动语态步骤
难点
根据时态、主语单复数正确变换 be 动词形式
被动语态在真实语篇（青藏铁路短文）中的综合运用
不规则动词过去分词记忆
三、教学准备
PPT 课件、青藏铁路实景图片、课堂练习题单、单词卡片
四、教学过程（45 分钟）
Step1 Lead-in 导入（5min）
出示摇滚英语配图，引出话题：Today we will learn a super useful grammar—Passive Voice.
对比例句：
Many people speak English.（主动）
English is spoken by many people.（被动）
提问填空，梳理基础概念：
主动语态：主语是动作执行者；被动语态：主语是动作承受者。
板书核心：被动语态 = be + done
Step2 Presentation 语法精讲（15min）
4a 活动：划出句中被动语态动词，逐句分析时态
A mini-camera is connected…（一般现在被动）
A radio message was sent…（一般过去被动）
can all be made（情态动词被动）
分四类梳理时态被动结构，板书表格：
表格
时态 被动结构 例句
一般现在 am/is/are + done The room is cleaned every day.
一般过去 was/were + done The bridge was built in 1980.
一般将来 will be + done A new station will be built.
情态动词 情态动词 + be+done The work must be finished.
主动变被动口诀 + 五步解题法：
口诀：主变宾，宾变主，谓语 be 后过分词，再加 by 原主语
五步：找宾语→变主语→定 be 单复数→定时态变 be→动词变过去分词→原主语放 by 后
即时小单选巩固（课件内基础选择题）
Step3 Practice 分层操练（15min）
活动 1：4b 单词变形填空（基础）
学生独立完成，同桌互查，逐句核对答案，讲解易错点（invent/press/find 过去分词）
The telephone was invented…
People…are connected…
The word was introduced…
the button was pressed…
oldest wheel was found…
活动 2：4c 语篇填空（提升，结合青藏铁路文化）
出示青藏铁路图片，简单介绍背景：the Sky Road，世界海拔最高高原铁路，冻土、野生动物通道等知识点
学生独立完成短文动词变形，全班核对，重点讲解：
一般现在主动 connects；一般过去被动 were needed/were used/were built；情态 have to be created；现在完成 have increased；固定搭配 help (to) improve
拓展德育：青藏铁路带动旅游、经济，保护野生动物，体现中国基建实力。
活动 3：小组互动
两人一组，用被动语态描述身边物品（desk, phone, pencil 等），每组展示 1 句。
Step4 Summary 课堂小结（7min）
单词齐读：齐读本节课 10 个新单词
语法复盘：
被动核心结构：be + done，时态变化全靠 be 动词
四大时态被动快速回顾
重点句型背诵：It is believed that… / It was impossible to…
Step5 Homework 作业布置（3min）
必做：背诵单词短语；用被动语态写 5 个完整句子
选做：搜集一条关于青藏铁路的英文短句，改成被动语态
五、板书设计
Passive Voice 被动语态
含义：主语是动作承受者
结构：be + 过去分词 (done)
①一般现在：am/is/are+done
②一般过去：was/were+done
③一般将来：will be+done
④情态：can/must + be done
主动变被动五步：宾变主→定 be→变分词→by + 原主
新词：telephone, wheel, frozen, pipe, tourism, economic
语篇：Qinghai-Xizang Railway (the Sky Road)
六、教学反思
学生能否区分不同时态 be 动词变化？不规则过去分词是否需要额外巩固？
青藏铁路语篇是否能调动学生兴趣，文化渗透是否到位？
课堂练习分层是否合理，学困生是否跟上节奏？/ 让教学更有效 精品试卷 | 英语学科
一、基础过关：写出下列动词的过去分词
1.invent ________
2.connect ________
3.introduce ________
4.press ________
5.find ________
6.build ________
7.use ________
8.create ________
9.allow ________
10.finish ________
二、单项选择（时态被动辨析）
1The 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 in the world.
A. was spoken B. is spoken C. spoke D. speak
3.The old bridge ______ in 1980.
A. builds B. built C. was built D. is built
4.A new library ______ in our school next year.
A. builds B. will build C. will be built D. is built
5.The work ______ before 6 o’clock every day.
A. must finish B. must be finished C. finishes D. is finishing
三、用括号内动词正确形式填空
1.The light bulb ________ (invent) by Edison many years ago.
2.All the students ________ (connect) with each other by WeChat now.
3.This kind of new machine ________ (introduce) last month.
4.The door ________ (lock) when you leave the room.
5.The oldest paper ________ (find) in ancient China.
四、语篇填空
The Qinghai-Xizang Railway ________ (be) famous as the “Sky Road”. It ________ (connect) Xining and Lhasa. Many difficult problems ________ (meet) when people built it. Special pipes ________ (put) under the frozen earth to stop the ground from melting. Some tunnels ________ (create) to go through mountains. Many special bridges ________ (build) for wild animals, so they ________ (pass) safely under the tracks. Tourism and local economy ________ (improve) a lot since the railway opened. More similar high railways ________ (build) in the future.
五、句型转换：主动变被动
1.People make paper from wood.
2.Paper ____________________________________
3.Workers built this station in 2006.
4.This station ________________________________
5.We will finish the task tomorrow.
6.The task ___________________________________
7.You must clean the classroom every day.
8.The classroom ______________________________
六、拓展写作（必做作业）
用被动语态写 5 个完整句子，主题：日常物品 / 发明 / 青藏铁路。
九上Unit 5 Power Of Ideas Section A (4a-4c)课堂练习参考答案：
一、基础过关;过去分词
1. invented 2. connected 3. introduced 4. pressed 5. found
6. built 7. used 8. created 9. allowed 10. finished
二、单选
1.A 2.B 3.C 4.C 5.B
三、动词变形
1. was invented 2. are connected 3. was introduced 4. must be locked 5. was found
四、语篇填空
is; connects; were met; were put; were created; were built; can pass; have been improved; will be built
五、句型转换
1. is made from wood by people.
2. was built by workers in 2006.
3. will be finished by us tomorrow.
4. must be cleaned by you every day.

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