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Step 1. lead-in
T: Nowadays, the computer is a hot topic. So there is a discussion about computers among our teachers. (at the same time, the teacher presented the photos of their teachers of some subjects.)
设计意图：通过呈现几个教师的照片，一下子唤起学生的兴趣，从而自然而然的引入话题。
Step 2. Words revision
Story one : T: First, comes Miss. Wu：the teacher of your computer science. Here is your view on computers and you need fill in the blanks.
appearance / electronic/ type/ virus/ logically/ personally/ download/
I am a high school teacher of computer science. __________, I am greatly interested in _______ machines. I teach the students about the different ________ of computer and their functions. Of course they learn how to ________ useful information from the Internet. I also train them to think ________ about the information to choose. A problem that sometimes happens is that it is possible for a computer to get a _________. I help my students become aware of how to avoid the __________ of a virus. I love this job, because I am happy to see that my students’ ability to use computer improves with my help.
(several minutes later) Let us read the passage together.
Ss:
T: Here “Type” means____.
Ss:种类
T: What is he doing? (Show a picture of a man who is typing)
Ss: Typing, 打字。
（blackboard: type: n.种类&v.打字）
T: What do these words marked in red in common? What about the blue words?( The teacher mark ed some adv. in red while some adjectives in blue based on the above passage)
Ss: 副词； 形容词
T:对。先看一下这三个副词分别修饰什么？
Ss: personally修饰整个句子I am greatly interested in electronic machines；greatly修饰interested；logically修饰think.
T: 对。副词可以修饰整个句子（这是通常放在句首）；还可以修饰形容词、动词和副词。
这些形容词的作用是什么？
Ss: useful做定语修饰information; aware 和 happy做表语与系动词构成系表结构。
T: Correct the following sentences.
1. The appearance of computers has total changed .
2. Music has been called the universally language.
3. Personal, I'd prefer to go to Japan.
(与学生校对答案后，教师板书：total(adj.) – totally (adv.); universal (adj.)---universally (adv.); person (adj)---personally (adv.))
T: in this sentence ”A problem that sometimes happens is that it is possible for a computer to get a virus.”, there is a word can be replaced by a word from this unit. What is it?
Ss: “arise” can be used to replace “happen”
T: arise 指Vi. “产生，出现，发生”。主要用于问题、困难等不好的事情的产生、发生、出现。易混淆的单词有----?
Ss: arouse; rise; raise
T: 我们除了从意思上加以区别， 还要注意它们是及物还是不及物的。(教师板书：词汇辨析1：arise: Vi. 产生，发生;arouse vt. 唤醒，引起;rise vi. .升起，上升;raise vt “举起，提高，饲养)Now, finish the following exercise with the four words.
Arise- arose-arisen Vi. “产生，出现，发生”。主要用于问题、困难等不好的事情的产生、发生、出现。
Arouse-aroused-aroused vt. “唤醒，引起，激起”。
Rise-rose-risen vi. .升起，上升，上涨，起身
Raise-raised-raised vt “举起，提高，饲养”
1.The problem ______ various arguments among people
2. With the cost of living ______, they find it hard to make ends meet.
3. I ______ my voice to make myself heard clearly.
4. I thought it would be easy, but a lot of problems ______
T: The students’ ability to use computer improves with Miss. Wu’s help. with one’s help等于---？
Ss：with the help of sb.
T: with one’s help等于with the help of sb.,但with the help of sth.不可换成其他的。Now, please translate the sentence: 在Smith 先生的帮助下，我们取得了极大的进步。
S1: With Mr. Smith’s help we have made great progress
T: Which is the answer to the following question.
I will never forget Mr. Smith,_________ help we have made great progress.
A. with his B. with whose C. his D. who
( Twenty seconds later, the teacher check the answer with students and explain the reason why B is the answer.)
设计意图：通过这个故事的呈现，进行了词汇巩固和复习。同时，利用这个故事，再一次复习了形容词和副词在句中的运用，这对学生在改错时很有帮助。
Story 2:
T: It’s Mr. Yang’s turn. As your physical teacher, he likes to use some verbs to express himself. What’s the meaning of those words “calculate\explore\signal\solve” （教师板书这四个单词）
Ss:
T: Now, let’s find out his opinion about computers.
calculate/exploring/signal/solve
I have to admit that It is with the help of computers that people have achieved the goal of __________ the Moon and Mars. Recently, the manned spacecraft(宇宙飞船)Shenzhou-8 has been launched successfully and scientists’ efforts are paid off. Because scientists must _______ many difficult problems. They ________ how fast it should travel and make sure how it can ________ to the earth.
(几分钟后，教师让全班齐读来校对答案)
T: “goal” here means----?
Ss: 目标
T; So “ achieve the goal of----“ means---?
Ss; 达成目标
T: At last, Mr. Yang get his conclusion: In a way, scientists deserve more praise. “In a way” means ----?
Ss:在某种程度上
T:跟way相关的词组有on the way、by the way和in the way等。它们是什么意思？
Ss：
T: (教师板书词汇辨析2：in a way/on the way/by the way/ in the way 及它们各自的意思。)
Finish the following structures with the four phases.
1. A terrible typhoon is ________ to Wenzhou.
2. You have done a really good job. ________, how is your mother recently?
3. ________, I like this new textbook very much.
4. Please remove your bike. I’m afraid it is __________.
设计意图：通过这个故事的呈现，首先进行了几个动词巩固和复习。同时，复习了其他几个重要词汇。
Story three
T: Now, it’s Ms. Hong ‘s turn. She wants to say something about the changes caused by technological revolution.
What does it remind you of?(同时教师在幻灯片上呈现图片：瓦特改良的蒸汽机)
Ss：学生答案并不一致。
T：（教师在幻灯片上直接呈现：____________ ___________ (技术革命) means too much to people because it makes a great difference to human race.）How to say “技术革”？
Ss：technological revolution
T：technological 是什么词性？
Ss; 形容词
T：它的名词是？
Ss: technology
T: (板书：technological adj. & technology n. ) What are they? (同时教师在幻灯片上呈现图片：人造花和人造蛋并句子：_______ flowers, even _______ eggs appeared.)
Ss: artificial flowers , artificial eggs(学生在教师的提示下得出答案)
T：Nowadays, children spend much time on computers. They have low EQ, but high IQ. What does “I” stand for? (同时教师在幻灯片上呈现图片：一群孩子)
Ss; Intelligence
T: intelligence 是什么词性？
Ss： 名词
T：意思?
Ss：智力；聪明。
T: 它的形容词是？
Ss: intelligent
T: (板书：智力；聪明 intelligence n. & intelligent adj.) Now, you needn’t be worried about whether your children can be taken care of. Because they can be ________________ by robots.
(同时教师在幻灯片上呈现图片：孩子和一个机器人和句子： They can be _________ by robots)
Ss: watch over(学生在教师的中文提示下得出答案)
T：What does “watch over” mean?
Ss: 看守, 监视, 照管
T: 跟over相关的词组有turn over、go over 和look over。它们的意思是?
Ss：翻转、移交；复习、仔细检查；查看
T：（板书：词汇辨析3 ：watch over、 turn over、go over 和look over及各自意思）Finish the following exercise and choose the best answer.
-- I have been worried about the possible danger of driving on a railway line.
--Do not be afraid; God will ________ us.
A. turn over B. watch over C. go over D. look over
The car was _______ and the driver seriously injured
A. turned over B. watched over C. gone over D. looked over
(一分钟后，与学生校对答案)
T：The robot knows ________ to deal with the housework /_________ to do with the housework(同时教师在幻灯片上呈现图片：一个家用机器人和这个句子)
Ss: How to deal with the housework . What to do with the housework
T: Which word can be used to describe the robot?
Ss: intelligent (个别学生才能答出)
T：”deal with”有很多的意思，我们看一下在以下的句子中它分别是什么含义？
1. My computer has helped me deal with many problems
2. Deal with a man as he deals with you.
3.This book deals with the development of computer.
（教师边讲解边校对）
T：Technological revolution has changed people’s life. Some problems arise because of the advanced technology, but the convenience it brings can’t be ignored anyhow.（这句话同时呈现在幻灯片上）Finish the following sentence with “anyhow”
Now the Temple Fair can’t work out as much as people expect. But ______________________________________. (不管怎样，它给孩子们带来了极大的欢乐)
S3:But anyhow, it brings much happiness to children
T: anyhow等于？意思是？
Ss: anyway.不管怎样，即便如此
T：还有一个易混淆的单词是someway，它等于somehow 是副词，意为“不知怎么地；用某种方法” For example，we'll get there somehow, by boat or otherwise. 我们总要设法去那里的，乘船也好，用其他办法也好 (板书：词汇辨析4：Anyway=anyhow adv.无论如何；即使如此 &someway=somehow adv. 不知怎么地；用某种方法) Finish the exercises.
1）It may rain, but we shall go_________.
2）He could have finished it on schedule, but _________ he fell behind.
(半分钟后，和学生校对答案)
设计意图：通过看图说话这种形式，激起学生学习的兴趣，又很直观的激起学生的固有词汇知识，从而达到词汇复习的目的。
Story four:
T: I want to share my story with you. Now, fill in the blanks.
Virus/from then on/ as a result/as time goes by/arise/totally/ in a way/deal with
I bought a computer last year. ___________, my son began to play games often._____________, I became more and more worried about her eyesight. What’s more, his careless use made the computer often out of order.__________ a problem ______ one day. An unknown _____ attacked the computer and destroyed it _____. ________, I was happy. However, he asked me to buy him a new one. how should I _______ it?
(几分钟后，让全班齐读来校对答案)
T：What does“from—on” mean?
Ss: 从什么时候起
T: How to say”从现在起”
Ss: from now on
T: What does “as time goes by”
Ss:随着时间的过去
T:我们还可以怎样表达？
Ss: with time going by
T: What does ”as a result “ mean?
Ss: 结果
T:我们一起来看以下其他与“result”的相关的词组：as a result of/ result in/ result from .他们分别是什么意思？
Ss: 作为 ... 的结果, 由于; 导致, 结果是; 起因于.
T: (教师板书：词汇辨析5：as a result/as a result of/ result in/ result from及各自的意思) Finish the following exercises with the four phrases.
1) He is addicted to computer games. ___________, he has ruined his health.
2) ____________ his addiction to computer games, his health has been ruined.
3) His addiction to computer games __________ his ruined health.
4) His ruined health __________ his addiction to computer games.
设计意图：通过故事的呈现，复习了重要词汇，并让学生自然而然的从中归纳出这样的结构：from then on ----as time went by---- as a result----，从而为作业的完成做好铺垫。
Step 3 : Homework
T: Firstly, you should write a summary of the passage of unit 3 in the third person， including the following structure:
Over time computers have changed quite a lot.----from then on ----as time went by---- as a result----.
Secondly, translate your summary into Chinese.
设计意图：通过对文章的概括，除了进一步的复习和巩固词汇外，还可以再一次的对课文进行回顾。
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