Learning about Language国家获奖教案

现在完成时被动语态课件

Step1 复习被动语态结构

1) 一般现在时的被动语态

(am/is/are+ 过去分词) 如: The work is done. 2) 一般过去时的被动语态

(was/were+ 过去分词) 如: He was sent to the hospital immediately after the accident. 3) 一般将来时的被动语态

(will/shall + be + 过去分词或

+ be going to + be + 过去分词) 如: The work will be finished soon. 4) 现在进行时的被动语态

(is/am/are + being+ 过去分词) 如: The bridge is now being constructed.

Step 2 通过造句感知现在完成时被动语态的结构和意义。

工作已经被完成。

The work has been finished. 问题已被解决。

The problem has already been solved. 现在完成时的被动语态

(have/has +been + 过去分词) 如: The radio has been repaired when

we phoned the shop.

Step 3 否定句、一般疑问句、特殊疑问句的形式

1.否定句：

Your computer has been repaired.

Your computer has not been repaired. 2.一般疑问句：The door has been painted. Has the door been painted? 3.

特殊疑问句：The problem has been discussed for nearly 2 hours. How long has the problem been discussed?

Step 4 完成语法练习

P21 exercise 1. My friend has bought a new personal computer. A new personal computer has been bought by my friend. 2. The shop has repaired my computer very quickly. My computer has been repaired quickly by the shop. 3. My computer has just been attacked by an unknown virus.

4. The problem has not been solved yet.

5. The computers have been given away to a local school by the company. 6. A kind of intelligent robot has been developed by the scientists

改错练习

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. A PC has being built the way we wanted. A PC has been built the way we wanted. 4. Our computer just has been joined to the internet. Our computer has just been joined to the internet. 5. The computer was used every day since we bought it. The computer has been used every day since we bought it. 6. A lot of e-mails had written on the computer in the past 5 years. A lot of e-mails have been written on the computer in the past 5 years.

用动词正确形式填空。

1. First as a PC and then as a laptop, I _______________ (use) in offices and homes since the 1970s.

2. Over time my memory ______________ (develop) so much that, like an elephant, I never forget anything I __________________(told). 3. Since the 1970s many new applications

__________________ (find) for me.

4. I have also ___________(put) into robots and used to make mobile phones

as well as _________(help) with medical operations.

5. I ____________________(put) into space rockets and sent to explore the Moon and Mars.

用被动语态改写下列句子

1. They have finished the construction of the new railway lines by now. 2. We have built a new library and a gymnasium in our school this year. 3. The car factory has produced a great many fine cars since the technological revolution. 4. They have made a plan to help the poor children in the poor area. 5. The government has spent a lot of money on the Hope Project.