Learning about Language教案2

必修2

UNIT3 COMPUTER

Learning about language

The General Idea of This Period：

This period includes revision of the text、learning about language.From this period the students will learn how to use some of the key words and expressions in the text and do some exercises for consolidation，and learn how to use the Present Perfect Passive Voice. Teaching Aims：

1.Help the students to learn to use some useful words and expressions. 2.Enable the students to learn how to use the present perfect passive voice. Teaching Important Point：

The use of the present perfect passive voice. Teaching Difficult Points：

How to master the usages of some important words and phrases and the Present Perfect Passive Voice. Teaching Methods：

1.Task-based learning. 2.Cooperative learning. 3.Explanation and practice. Teaching Aids：

1.A tape recorder. 2.A multimedia. Teaching Procedures：

Fill the word or expression for each of the following meanings from the text. 1 _________ complete change in ways of thinking, working, etc

(revolution) 2 ________ connected computer system.

(network) 3 _________ to make things easier

(simplify) 4 _________ to find the answer using numbers

( calculate) 5 _______can be moved easily from place to place

(mobile) 6 _______ to work out the answer to a problem

(solve) 7 _______to travel around an area to find out about it

( explore) 8 _______ completely

(totally) 9 ________ anyway

(anyhow) 10 _______ activity of managing money

(finance) Complete the passage with the words below. artificial

technology

intelligent

applications

explore

Web

reality

logically

My brother was very interested in computers and enjoyed writing programs of his own. He used to download information from the Internet and made good use of it. He liked to explore the World Wide Web and used the Internet to communicate with computer programmers all over the world. When he went to university he studied IT (information technology_)and developed a special in _artificial intelligence. After developing special applications of the computer, he hopes to design an intelligent robot which can think logically and look like human being, but in reality he was a

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long way to go. Discovering useful structures

The Present Perfect Passive Voice

Revision 一般将来时被动语态

(Future Passive Voice) 构成形式:

Will/shall

+be

+

V过去分词

shall 用于第一人称:

I /we ,

will 用于任何人称

否定句: 在will/shall后+not 一般疑问句:

把will /shall 提前

be going to be +V过去分词

be to be +V过去分词

The students of class one will clean the playground. The playground will be cleaned by the students of class one.

We are going to hold a meeting on Saturday afternoon. A meeting is going to be held (by us) on Saturday afternoon. A computer will be given (by the host) to the winner as the prize. Discovering: Complete the sentences on the screen and find something in common. What has the robot done? When you get home, you find:

①

The robot has _cooked_the dinner.

The dinner has been cooked

②

The robot has watered the flowers.

The flowers has been watered.

③

The robot has washed the clothes.

The clothes has been washed.

④

The robot has tidied the bed.

The bed has been tidied.

Sum up the similarity of the sentences above.

The dinner has been cooked.

The flowers have been watered.

The clothes have been washed.

have

/ has

been

done

现在完成时

被动语态

现在完成时的

被动语态

Pick out sentences in the present perfect passive voice from the reading text.

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Over time I have been changed quite a lot.(line1)

2

I have been used in offices and homes since the 1970s.(line17)

3

I never

forget anything

I have

been

told. (line21)

4

Since the 1970s many new applications have been found for me. （line 25）

5

I have also been put into robots and used to make mobile phones as well as help with medical operations. (line 28)

6 I have even been put into space rockets and sent to explore the Moon and Mars. (line30)

现在完成时被动语态

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1 句型变换：

He has been sent to study the new technology in the company.

否定句:

He has not been sent to study the new technology in the company.

一般疑问句:

Has he been sent to study the new technology in the company?

特殊疑问句:

Where has he been sent to study the new technology?

2 用法

1.表示一个被动的动作发生在过去,强调对现在造成的影响和结果.

The door has been locked.

Has the work been finished yet?

2.表示一个被动的动作或状态开始于过去,持续到现在,并可能持续下去,常与for 或since引导的时间状语连用,或用于How long...?句型中.

The important problem has been discussed for nearly two weeks. How long has the machine been used?

现在完成时的标志:recently /already/yet for+一段时间

/since+时间点

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) 当句子的宾语是反身代词、相互代词、同源宾语、抽象名词或动名词时，不用被动。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 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?

Grammar practice P21.Ex2 1.My friend has bought a new personal computer.

2.The shop has repaired my computer very quickly.

3.An unknown virus has just attacked my computer.

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Exercises

1. Both of my brothers work at the power station that ___ in my hometown.

A. has set up

B. has been set up

C. was set up

D. is set up

2. ---_____ the sports meet will be put off.

A. I’ve been told

B. I’ve told

C. I’m told

D. I told

3. All the preparation for the task ____, and we’re ready to start.

A. completed

B. complete

C. had been completed

D. have been done

4. ---- How long ____ at this job?

---- Since 1990.

A. were you employed

B. have you been employed

C. had you been employed

D. will you be employed

5. When and where to go for the on-salary holiday ____ yet.

A. are not decided

B. has been not decided

C. is not being decided

D. has not been decided

6. Betty___ injured since last Saturday.

A. has been

B. was

C. is

D. has

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