Unit 3 Computers
any high buildings have been set up.
Lots of flowers and trees have been planted.
A new bridge has been completed….
Ask the Ss to discover whether these sentences have something in common.. Help them to learn the useful structure : the Present Perfect Passive Voice.
Step3: Discussion : learning the structure
Give some explanations
现在完成时 have/has done----------have/has been done
He has been sent to study the new technology in the company.
The dirty clothes have not been washed.
Have the windows been cleaned?
How many shopping centers have been built in this city?
2. 只有及物动词才有被动语态，不及物动词（词组）没有被动语态, 如:happen, take place,
die, appear, disappear, fail, remain, lie, last, sit ,stand, break out, come true, belong to等．如：
What has happened to your brother?
The child has been taken good care of by Grandma Wang all these years.
A notice has been put up on the wall
Step4: Practice and exercises
1.Change the following sentences into the Present Perfect Passive Voice.
!). We have completed all the preparations for the task, and we’re ready to start.
2). This company has produced new types of computers.
3). They have interviewed several teachers for the job.
4). George has sent some texts and pictures to his friend’s cellphone.
5). They have developed some programmes for the human resource department of their company.
2.Change the following sentences into the Present Perfect Passive Voice. Put the verbs into correct form.
Recently we have bought a new personal computer. We have used the computer every day since we bought it. We have just joined our computer to the Internet. However, we have found many problems with it. So we have decided to ask a professional man to fix it. Soon he has fixed the computer. He has built a PC way we wanted . How excited we are! These days we have written a lot of E-mails on the computer. We have decided to write a report about the positive and the negative effects of using computers.
3. Do some exercises: choice
Step5: Using the structure : Play a game—What has been decided.
1. Give The Ss the situation : Get into groups of four. Your task is to decide what has been decided for the class .Take turns to make the ideas as interesting or as lively as you can.
2. Give the Ss some examples:
S1: It has been decided that those who do not do heir homework will be asked to return to school on Saturday.
S2:It has been decided that those who keep the classroom tidy should be allowed to go home early everyday.
S3:It has been decided … S4:…
3. Ask them to collect the ones they all like best and be prepared to tell them to the class.
Step6: Further Study: 高考链接(This step can be done according to teaching needs.)
1. ---How long _____ at this job? B
--- Since 1990.
A. were you employed B. have you been employed
C. had you been employed D. will you be employed
2. When and where to go for the on-salary holiday ___yet. (2003 上海春季) D
A. are not decided B. have not been decided
C. is not being decided D. has not been decided
3．All the preparations for the task ___, and we are ready to start. (2000 北京春季) D
Step 7: Homework
1.Finish Exercise 1 on P57.
2.Revise the Present Perfect Passive Voice.