Learning about LanguagePPT及课堂实录内容

Book 2 Unit 3 Computers 凌源中学

郎潇潇

Class type: vocabulary and grammar Teaching aims: Knowledge objects 1.

Remember and master the key words, phrases and useful expressions.

2.

Master and use the grammar of the present perfect passive voice Ability objects Enable students to use the present perfect passive voice correctly to solve the problems. Key points and difficulties: Key points: to get the students to know the present perfect passive voice and learn how to use the present perfect passive voice. Teaching difficulties: to enable the students to use the present perfect passive voice correctly. Teaching aids: The Multi-Media, a blackboard, some chocks Teaching methods: discussing, summarizing and practicing

Step1 Revision T: Boys and girls, in last period we have learned something about the history and development of computers. Now you can see some figures on the blackboard. Who would like to retell the text with the help of these figures?

You, please!

Retell the text according to the figures: In 1642, a calculating machine was used in France. Then in 1822, the analytical machine was made by Charles Babbage. It could follow instructions from cards with holes. In 1936, Alan Turing, the real father of computer, wrote a book to describe how computers could be made to work and built a “universal machine” to solve any mathematical problem. Later, people discovered the computer had “artificial intelligence”. In the 1960s, the computer got his new transistors. Its size was totally changed at that time. And in the early 1960s, the first family of computers was connected to each other. In the 1970s, computers have been brought into people’s homes. Now computers have been used by billions of people to deal with information and communication with each other around the world by the Internet. Congratulations! You have done a good job! Now try to do the same to your partners, ok?

Step 2

Language practice

Task 1:

T: Open your book and turn to page 20. let’s finish this part. At first, look at ex.1--from the reading passage, find the words and expressions with the following meanings. You’ll have 1 min and then give me your answers! Begin!

Who want to give me the answers? Volunteers?

(Teacher give the students enough time to finish the exercise. Then check their answer) Suggested answers: revolution network simplify calculate mobile solve explore totally anyhow finance Task 2:

T: Go on to look at ex.2--complete the passage with words below. Pay attention to the use and the forms of those words. Work in pairs and then check your answer together! Suggested answers: Explore technology artificial application intelligent logically reality Good job! I believe you have mastered the usages of the important words and expressions in this part. But sentence structures also count!

Step 3 Grammar Lead-in T: Boys and girls, now please pay attention to the following sentences in the text: What verb tense and verb voice are used in these sentences? Yes, the present perfect passive voice is used in these sentences. Can you tell us the structure of the the present perfect passive voice? Subject + have/has +been +done

Grammar explanation Teacher help the students to deal with how to express the present perfect passive voice. Learn the present perfect passive voice from three parts: concept, sentence patterns, and usage. 1. Concept 现在完成时的被动语态表示动作发生在过去，到现在已经完成或对现在仍有影响，表示“。。。已经被。。。”

2. Sentence patterns 1). 现在完成时被动语态肯定句

主语+has/ have been +P.P. Her motorbike has been stolen. 她的摩托车被盗了。

2). 现在完成时被动语态否定句

主语+has/ have +not+ been+ P.P. The task has not been finished yet. 任务尚未完成。

3). 现在完成时被动语态一般疑问句(需将have/has提到主语的前面) Has he(she, it,单数名词)+been+P.P.+...?

A new computer has been bought. Has a new computer been bought? 买了一台新电脑吗?

4). 现在完成时被动语态特殊疑问句

疑问词+have (has)+主语+been+ P.P.+...? How many buildings have been built in this school? 这所学校已经建造了多少座大楼? 3. Usage 1). 现在完成时的被动语态同它的主动语态一样，强调过去的动作对现在造成的影响，常与already, yet, just，recently, never等副词（置于have / has和been中间）连用。如: I have never been laughted at by others in public. 2). 并不是所有动词都有被动语态。只有及物动词才有被动语态。不及物动词（短语）没有被动语态。

例如happen, take place, break out, belong to, cost, last等不及物动词或词组无被动语态。如：

[误] Great changes have been taken place in China since 1978. [正] Great changes have taken place in China since 1978. 3). 许多不及物动词加介词或副词构成的动词短语，相当于及物动词。但动词短语是一个不可分割的整体，变为被动语态时，不可丢掉介词或副词，如：

The patients have been taken good care of. A notice has been put up on the wall. 4). 一些特殊动词, 如borrow, finish, begin, buy, start, return, marry, open, join等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思，

则需改换动词或时态。如：

My brother has had (不能用has bought) this bike for almost four years. Grammar Practice 1. open your book and page 21--ex.2 Change the following sentences into the present perfect passive voice. 1). A new personal computer has been bought by my friend.

2). My computer has been repaired by the shop very quickly. 3). My computer has just been attacked by an unknown virus. 4). The problem have not been solved by us yet. 5). The computers has been given away to a local school by the company. 6). A kind of intelligent robot has been developed by the scientists. 2. 高考链接

1）. I got caught in the rain and my

suit _______. (北京2007)

A. has ruined

B. had ruined

C. has been ruined

D. had been ruined

2）. Professor James will give us a

lecture

on the Western culture, but when and

where ___ yet. (浙江2007)

A. hasn’t been decided

B. haven’t decided

C. isn’t being decided

D. aren’t decided

3）. If Newton lived today, he would

be surprised by what _____ in

science and technology. (天津2007)

A. had discovered

B. had been discovered

C. has discovered

D. has been discovered 3.

改错

1. A personal computer has bought by us. A personal computer has been bought by us. 2. Many problems has been found with our new computer. Many problems have been found with our new computer. 3. Our computer just has been joined to the internet. Our computer has just been joined to the internet. 4. The computer was used every day since we bought it. The computer has been used every day since we bought it.

Step 4. Sum up 1.

Useful words and expressions 2.

Grammar: the present perfect passive voice

Step 5. Homework 1.

Learn the important words, phrases and some useful expressions by heart after class. 2.

Review the grammar by doing exercises in your notebook.