Learning about Language优质教案设计

人教版必修2 Unit 3

Computers

Learning about Language 教学设计

遂溪县第三中学

周

细

教

学

目

标

知识目标: Learn the Present Perfect Passive Voice. 能力目标：Help the students master the way of using the correct voice, telling the differences between the active voice and the passive voice.

教学方法: Discuss

explanation 教

学准备: PPT 教学重点：Learn the Present Perfect Passive Voice. 教学难点：How to use the Present Perfect Passive Voice. 教学过程

Step I

Revision

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 Step II Presentation

Leading in the new lesson 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. Step III Consolidation 1.Ask the Ss to discover whether these sentences have something in common..

Help them to learn the useful structure : the Present Perfect Passive Voice. 2.Discuss with your partners. 3.Give some explanations (1).构成

主动语态 被动语态

现在完成时 have/has done----------àhave/has been done 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。

3. 现在完成时被动语态一般疑问句

Has he(she, it,单数名词)+been+P.P.+...? Has a new computer been bought?买了一台新电脑吗? Have they been sent abroad to study Eng-lish?他们已经被派往国外学英语了吗? 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.+...? What has been bought by Tom?汤姆已经买了什么东西? Who have been helped by the new computer?谁已经得到这种新计算机的帮助? How many buildings have been built in this school?这所学校已经建造了多少座大楼?

Where has the car been repaired?这辆小汽车已经在哪里修理好了?

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. Step IV Practice and exercises 一、改错

1.A personal computer has bought by us. 2. Many problems has been found with our new computer. 3. A PC has been built the way we wanted. 4. Our computer just has been joined to the internet. 5. The computer was used every day since we bought it. 6. A lot of e-mails had written on the computer in the past 5 years. 二、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.

Step V Homework

1.Finish Exercise 1 on P57.

2.Revise the Present Perfect Passive Voice