Learning about Language优质课教案设计

Unit 3 Computer

Learning about language 教学设计

I.Teaching aims（教学设计）: 1. To know the structure of the present perfect passive voice. 2. To learn the usages of the present perfect passive voice. 3. To become interested in grammar learning and try to use them freely.

II.Teaching steps(教学步骤)：

I.Revision：Go over the words and phrases in this unit. Discovering useful words and expressions

1._________ complete change in ways of thinking, working, etc. 2. ________ connected computer system 3. ________ to make things easier 4. ________ to find the answer using numbers 5. _______ can be moved easily from place

to place 6.________ to work out the answer to a problem 7._______ to travel around an area to find out about it

8. ______ completely 9. _______ anyway 10. _______ activity of managing money

II.Leading-in:Discovering useful structures 1. First as a PC (personal computer) and then as a laptop, I have been used in offices and homes since the 1970s. 2. Over time my memory has developed

so much that, like an elephant, I never forget anything I have been told.

3. Since the 1970s many applications have been found for me.

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.

III. Presentation:

The Present Perfect Passive Voice 现在完成时的被动语态

定义：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.

结构：1. 现在完成时被动语态肯定句

主语+has/ have been +P.P.+... (P.P.=动词的过去分词形式) Her motorbike has been stolen.

她的摩托车被盗了。

All the offices have been linked by computer. 所有的售票处由计算机联网工作。

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。

Many skilled workers have not been trained in the company. 这家公司并没有培养多少熟练工人。

注意：

1. 副词的位置often, usually, always, never, hardly,seldom等副词置于have/has和been中间。

如:[误] Such a man has been hardly believed.

[正] Such a man has hardly been believed. 2. 并不是所有动词都有被动语态

1) 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. 2) open, break, drop等不强调动作发出者时常用主动语态。如：

[误] The door has been opened of itself.

[正] The door has opened of itself. 3. 短语动词不可分割或省略其中的介词或副词。

如：

The SARS patients have been taken good care of. 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. How long has this book been bought? How long ago was this book bought?

IV.Discussion&Conclusion：Offer Ss time to conclude the rules of the grammar 主动语态变被动语态的方法

(1) 把主动语态的宾语变为被动语态的主语。

(2) 把谓语变成被动结构(be＋过去分词)

(根据被动语态句子里的主语的人称和数，以及原来主动语态句子中动词的时态来决定be的形式)。

(3) 把主动语态中的主语放在介词by之后作宾

语, 将主格改为宾格。如：

All the people laughed at him.

He was laughed at by all people.

They make the bikes in the factory.

The bikes are made by them in the

factory.

歌诀是: 宾变主, 主变宾, by短语后面跟。

谓语动词变被动, be后“过分”来使用。

4) 双宾语动词变被动语态可将其中的

一个宾语变为主语, 另一个保留不动。

主动: I have given him the key. 被动: He has been given the key. 被动: The key has been given (to) him. 5) 带复合宾语的动词变被动语态时,

只能将宾语变为主语, 原来的宾补

保留不动, 改称主语补足语。

主动: I have asked her to help you. 被动: She has been asked to help you.

V. Practice:Choose the best answer.

1. I got caught in the rain and my suit _______.

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.

A. hasn’t been decided

B. haven’t decided

C. isn’t being decided

D. aren’t decided

3. If Newton lived today, he wouldbe surprised by what _____ in science and technology.

A. had discovered

B. had been discovered

C. has discovered

D. has been discovered 4. Cathy is taking notes of the grammatical rules in class at Sunshine School, where she _____

English for a year.

A. studies

B. studied

C. is studying

D. has been studying 5. With the help of high technology, more and more new substances

____ in the past years.

A. discovered

B. have discovered

C. had been discovered D. have been discovered 6. When you get the paper back, pay special attention to what _____.

A. have marked

B. have been marked

C. had marked

D. had been marked

二、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. A PC has been 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.

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.

VI. Homework Go over the rules of the grammar.