人教版高中英语必修二Unit3 Computers Period 3 Sentences and writing课件(共47张PPT)

课件47张PPT。Welcome to today's lesson!I learn! I participate! I experience! I enjoy! 我学习! 我参与! 我体验! 我快乐! Module2 Unit3 Computers
（Period 3 Sentences and writing）1. 知识目标：能在课文语境中体会、理解以下句型的含义和用法并能在具体语境中运用：
Before; as…; so … that… ;
2. 能力目标：能在语篇语境中运用本单元话题单词、词块、句型进行写作。
3. 情感目标：通过课文知识点的归纳，学生能灵活运用所学词汇，感受英语学习的快乐与成就感。I learn! I participate! I experience! I enjoy! 我学习! 我参与! 我体验! 我快乐! 预习案（限时5分钟，课前独立完成） 电脑和网络科技(Computer and Internet)[话题单词]1.______________________ n. 方便；便利2.______________________adj.有益的；有好处的
3. ______________________ adj.电子的
4. ______________________ n.技术；科技
5._______________________ n./vt. 更新conveniencebeneficialelectronictechnologyupdate6.______________________ n. 博客
7.______________________ vt. 下载
8. ______________________ adj.联机的，在线的
9. ______________________ n.电脑爱好者
10._______________________________ n. 计算机系blogdownloadonlinecomputer-loverthe Computer Department[话题短语]1. __________________________________对……上瘾
2. __________________________________负面影响
3. ____________________________________在…帮助下
4. _________________________________对…做出极大的贡献
5. __________________________________网购
6.__________________________________改变某人的生活
7. __________________________________改善生活质量
8. _________________________________越来越流行
9 . __________________________________上网浏览信息(网上冲浪)
10. _____________________________导致；促进…be addicted to negative effect with the help of 电脑和网络科技(Computer and Internet)make a great contribution to shop online change one's life improve the quality of life more and more popularsurf the Internet contribute to11. _____________________________________在家办公
12. _________________________________提供一个展示才华的平台
13. ________________________________释放压力
14. ________________________________
使我们的生活更加丰富多彩和舒适work at home provide a platform to show one’s talentrelease one’s pressuremake our life more colorful and comfortable[话题短语]15. __________________________________使交流更简便
16. __________________________________跟上最新消息
17. ____________________________________花太多时间上网
18. _________________________________被欺骗
19. _________________________________通过网络学习
20. ________________________________交换电脑学习经验make communication easier keep up with the latest information spend too much time online 电脑和网络科技(Computer and Internet)get cheated Learn through the Internetexchange computer learning experience 1.一方面，网上购物使购物更简单、更方便；但另一方面，网上付款又有风险。
On one hand，shopping online makes shopping a lot easier and more convenient. On the other hand，paying online has risks.
2. 就我而言，去实体商店购物更好，因为我们可以试穿衣服。
As far as I’m concerned，it’s better to do shopping in real stores because we can try the clothes on.
3.因为网上购物更便宜，所以我喜欢网上购物胜过去实体商店购物
Since shopping online is much cheaper，I prefer shopping online to shopping in real shops.电脑和网络科技(Computer and Internet)[话题佳句]Jack, 1_____ is an engineer,intends 2___________ (develop) his own android with artificial 3_____________ (intelligent) and human 4 ___________ (appear) . It can not only watch 5_______ his house for him in case he is out but also deal 6_______ his 7___________(person) affairs. He hopes it will become a 8__________(real) and 9_______ its help，life will be much 10____________________ (convenient) .[教材 语法填空与写作]电脑和网络(Computer and Internetwhoto developintelligenceappearanceoverwithpersonalrealitywithmore convenientI learn! I participate! I experience! I enjoy! 我学习! 我参与! 我体验! 我快乐! 探究案（课堂自主学习 交流合作完成 限时35分） I、Sentences1. before引导时间状语从句仿写2　过不了几个月李华就要从莲花中学毕业了。It will not be a few months _______ Li Hua graduates from Lianhua Middle School.1. I developed very slowly and it took nearly two hundred years _______ I was built as an analytical machine by Charles Babbage. 我发展缓慢，差不多到两百年后，查尔斯?巴比奇才把我制成了一台分析机。2. It will take/ be + 一段时间 + _____...________ (时态) 过多久才
It won’t 不久就…before【我的笔记】before一般现在时1. It was/took+一段时间+ _______...___________(时态) 过了多久才before一般过去时仿写1　昨天的雨过了很久才停了。It took a long time _______ the rain stopped yesterday.beforebefore1. It is/ has been+时间段+_______ sb. did sth.
自从…以来有一段时间了
2. It + is/was+介词+ 时间点+ ______...
就是在…时候…(强调句)
3. It was + 时间点+ ______... 当…时候
4. 主语+was/were doing...______...
(主语) 正在做…这时…
5. 主语+was/were about to do..._______...
(主语)正准备做…这时……◆拓展延伸sincethatwhenwhenwhen1.It was two years ________ he realized the truth.
2.It has been two years _______ he lived here.
3.I was doing my homework ______ she walked in.
4.It was at midnight _____ he arrived home.
5.It was midnight _______he arrived home. 【练习】beforesincewhenthatwhen_____ time went by, I was made smaller.
随着时间的推移, 我被做得更小了。2. as引导时间状语从句As2. _____ time going by, I was made smaller.
with【我的笔记】1. _______ time went/goes by/on, … 随着时间的推移
= ______ time going by/on, …Aswith[仿写]　随着互联网的普及，我们和朋友面对面的交流变少了。_______________________________________________________，we have fewer face -to -face talks with our friends.As the Internet is becoming more and more popular3. so/such…that…1. And my memory became so large _____ even I couldn’t believe it！
我的存储量变得如此之大，连我自己都不能相信！
that1. ____＋adj./adv.＋that…
2. ____＋adj.＋a(n)＋单数可数n＋that…
3. _____＋many/few/much/little( 少)＋n.＋that…
4. ____+ a(n) + adj. +单数可数n＋that…
5. ____+ adj. +复数n/不可数n＋that…【我的笔记】sosososuchsuch[仿写]　老师在给我们讲一个如此有趣的故事，以至于我们全都忘了时间。The teacher was telling us ____________________________ that we all forgot the time.so interesting a story/
such an interesting story注意：so＋形容词/副词, such ... 放句首时，主句用___________部分倒装课堂小结It took some time before…
As time went by, …
so/such…that…I learn! I participate! I experience! I enjoy! 我学习! 我参与! 我体验! 我快乐! 反馈训练案（课堂独立完成，限时8分钟）【单句语法填空】 It may take several years ______ a company can make money.
______time went by, people became more familiar with him and understood what he did.
_______time going by , people became more familiar with him and understood what he did.
We did so well ______we were invited to share our idea and experience _____ all the students from our school.
So excited_________(be) I that I couldn’t wait _______(try) my hand at riding the bicycle. beforeAsWiththatwithwasto try1. Our government has taken some measures to overcome the lack of electricity, but it will be several months since we have enough power.5. The sunshine today is very beautiful that I’d like to go swimming in the sea.【单句改错】before2. With time went by, he got used to the life in the new school gradually.Asgoing3. As the development of the Internet, the net bar plays an important
role in people’s life. With4. Finally, I got such tired of it that I decided something has to change. sohadso【单元词块与写作】 1__________________________________(随着网络的快速发展), more and more 2_______________ (apply) have been found for computers. People use them to type, signal 3________________________ (解决各种问题) and even handle some things that seem incredible, for example, 3exploring the moon . 4___________ (在某种程度上), computers have changed our life. 5_____________ (but/therefore/however), many new problems have come into being. 6 _____________________
____________________(许多学生喜欢电脑) that they spend too much time on them. Therefore, some of them fail the exams. 7_______ (somehow/anyhow), computers 8 _________________
_______ (在……中起着很重要的作用) our life.With the Internet developing rapidlyWith the rapid development of the Internetapplicationssolve all kinds of problemsIn a wayHoweverMany students become socrazy about computersAnyhowplay an importantrole inWriting practice【写作 实践】 假如你叫李华，你所在学校的学生会将举行一个电脑讲座，你准备邀请你的外国朋友John与你一起参加，通知内容如下：Dear John,
How is everything? I’m writing to let you know about a computer lecture and invite you to join us. The lecture will begin at 2:00 pm on September 25th and will be given in Room 204 of the Classroom Building. Professor Li from the Computer Department of Beijing University will lecture on the use of computer and how to learn through the Internet. After the lecture we’ll be given half an hour to exchange our computer learning experience. Then Professor Li will leave us time for questions and so you may bring your questions of computer learning. Any computer-lover is welcome to attend the lecture but is required to be there on time.
I’m looking forward to your early reply.
Yours truly,
Li HuaI learn! I participate! I experience! I enjoy! 我学习! 我参与! 我体验! 我快乐! 庭业作家1.整理好笔记,并保存好导学案。
2. 大声朗诵本单元的话题单词、话题短语和话题美文。
3. 复习今天的笔记。
4. 预习U4 (话题素材、高频单词、重点短语、热点句型)Thank you话题晨背购物(Shopping)
[词汇积累]——聚沙成塔
1.home-made (adj.)　 　家庭制作的，自制的
2.material (n.) 物质；材料
3.credit (n.) 信用
4.e-mail (n.) 电子邮件
5.salesman (n.) 售货员
6.recreation (n.) 消遣
7.exchange (v.) 交换
8.customer (n.) 顾客，消费者9.change (n.) 零钱
10.expensive/dear (adj.) 昂贵的
11.valuable (adj.) 贵重的
12.various (adj.) 各种各样的
13.bargain (n.) 讨价还价； 便宜货
14.as for 至于，对于
15.instead of 而不是
16.shop online 网上购物
17.on sale 上市；出售
18.pick out 挑选出[佳句背诵]——妙语连珠
1. On one hand，shopping online makes shopping a lot easier and more convenient. On the other hand，paying online has risks.
一方面，网上购物使购物更简单、更方便；但另一方面，网上付款又有风险。
2.As far as I’m concerned，it’s better to do shopping in real stores because we can try the clothes on.
就我而言，去实体商店购物更好，因为我们可以试穿衣服。
3.Since shopping online is much cheaper，I prefer shopping online to shopping in real shops.
因为网上购物更便宜，所以我喜欢网上购物胜过去实体商店购物。[样题展示]——沙场点兵
阿里巴巴集团(Alibaba Group) 11月12日零点公布的数据显
示，2015 年双十一全球网购狂欢交易额达到900多亿元人民
币。假如你是一位热衷网购的消费者，请你用英语谈谈热衷网购的理由。内容包括：
1.2015 年 11月11日该集团全球网购狂欢结果；2.与实体店相比网购的优点(便利、便宜等)；3.提醒大家不要沉迷于网购。
______________________________________________________
______________________________________________________ [佳作诵读]——妙笔生花
Alibaba Group says it sold the goods worth more than 90 billion yuan on the “Singles’ Day” of 2015.As an online shopping lover，I’m always convinced that shopping online is better than shopping in the stores. For one thing，there is no need to go out. Just click the mouse，and you will buy the goods you want. For another，goods online are cheaper than those in the shops，as a result of which buyers can save a lot of money. Besides，the traditional shopping is not so convenient as online shopping. Although I am crazy about online shopping，I think that we shouldn’t get addicted to it. Otherwise，it would become a heavy economic burden for us to bear.答案：
With science and technology developing quickly, computers can be applied to so many fields that we can't go without it. As a result, people could depend on computers to solve all kinds of problems, such as exploring the moon. Anyhow, it is also universally believed that computers can't take the place of human beings in the future.Key:① which was made in July, 2015　② and has artificial intelligence
③ such as cleaning the house and cooking the dinner, etc
④ if Allen can be updated when (it is) necessary 假设你拥有一个名叫Allen的机器人，请根据以下内容，以My Own Android 为题，简要介绍你的这位机器人朋友。
1. 制造于2015年7月，身高1.5米；
2. 具备人工智能，可以聊天、下棋、玩游戏；
3. 几乎会做一切家务，尤其在陪护年迈的爷爷方面令人满意；
4. 希望能够根据需要随时升级。Ⅳ.书面表达
随着科学技术的发展，人们的通讯方式发生了巨大变化。请对比过去和现在通讯工具的变化情况，并说明这些变化对人们生活所造成的影响。
注意：1.词数100左右；
2．可适当增加细节，以使行文连贯。
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　
【参考范文】
In the past few years，great changes have taken place in the means of communication.In the past，people used to write letters to communicate with others.Later，people began to use phones which made us get in touch with others more easily.Now many people use mobile phones and mobile phones are more convenient than phones.At the same time，more and more people choose to make use of the Internet.The Internet supplies us with all the advantages of mobile phone，but its fees are low.
From the changes of means of communication，we can realize the rapid development of our society.Mobile phones and the Internet are playing a more and more important part in our daily life.Ⅳ.单元考点作文串记
一、根据提示翻译句子
1．在互联网的帮助下，人们可以在家办公，收发所需信息。(with the help of)

2．人们可以通过互联网买卖所需物品。(whatever)
3．传统商店不能提供这样的服务。(provide)
4．人们可以下载各种资料。(download)
答案　1.With the help of the Internet，it's possible for people to work at home with a computer，sending and getting the information they need.
2．People can buy or sell whatever they want by the Internet.
3．Traditional shops can't provide them with such service.
4．People can download all kinds of information.
　　　　　　　　　　　　　　　　　　　　　　　　　　　
【参考范文】
Firstly，with the help of the Internet，it's possible for people to work at home with a computer，sending and getting the information they need. Secondly，people can buy or sell whatever they want by the Internet，while traditional shops can't provide them with such service.T hirdly，people can download all kinds of information. So I love surfing the Internet.二、单元话题微写作
电脑与网络
根据提示,将以下句子连成一篇英语短文。
1.自从电脑在各行各业普及后,人们对网络也非常关注。(all walks of life;attention)
2.目前网络已经成为获取信息的重要来源。网络给学习方式带来了巨大的变化,它使人们能够随时随地想学就学。 (obtain;bring about)
3.与此同时,网络也带来了一些负面影响。许多人,尤其是学生,沉迷网络,浪费了大量时间。 (meanwhile;be addicted to) Great attention has been paid today to the Internet since computers found their ways into all walks of life.At present,the Internet has become the major source of obtaining information in daily life.It brings about great changes in the way of learning,making it possible for people to learn wherever and whenever they want to.Meanwhile,it has some negative effects as well.Some people,especially young students,are easily addicted to the Internet and spend too much time online doing nothing concerning their work or lessons.?
Ⅲ.教材与微写作
写作素材(关于机器人)
1.杰克是一名工程师，想研制自己的机器人。
2.它将具有人工智能并有人的外表。
3.他不在家时，它能替他看守他的房子。
4.帮他处理他的私事。
5.他希望这会变为现实，在它的帮助下，生活会变得更便利。
提示：加蓝部分用本单元词汇表达，并且请使用who引导的定语从句，not only...but also...等连接词。连句成篇(将以上句子连成一篇50词左右的英语短文)Jack，who is an engineer，intends to develop his own android with artificial intelligence and human appearance.It can not only watch over his house for him in case he is out but also deal with his personal affairs.He hopes it will become a reality and with its help，life will be much more convenient.