Learning about Language优秀公开课教案

Unit 3

Computers

Learning about Language

I．教学目标

1. Get students to know the structure of the present perfect passive voice.

2. Let students learn the usages of the present perfect passive voice.

3. Get students to become interested in grammar learning.

II. 新课导入

1. Are you familiar with these computers?

Can you call them?

2. Do the red parts have something in common?

1)As years have gone by, I have been made smaller and smaller.

(2)A wrist-worn PC has been invented recently.

(3)The sports meeting has already been held in our school.

III. 课堂探究

Ⅰ.概念：

1. 说话时已经完成

的动作或出现的结果。

2. 主语是行为动作的承受者。

【注意】

1. 过去分词前有两个助动词have/has和been。

2. 必须表示被动。

I have been told about it many times．

The bridge has just been built．

II 句型

1. 现在完成时被动语态肯定句句型：

主语+ have/has been +过去分词

Her motorbike has been stolen.

2. 现在完成时被动语态否定句句型：

主语+ have/has +not+ been+过去分词

The task has not been finished yet.

Many workers have not been trained in the company.

3. 现在完成时被动语态一般疑问句句型：

Have/Has

+主语

+ been+ 过去分词

...? Has a new computer been bought ?

Have they been sent abroad to study English? 4. 现在完成时被动语态特殊疑问句句型：

疑问词+

have/has + 主语+ been+过去分词

...?

Where has the car been repaired? Who have been helped by the new computer?

How many buildings have been built in this school?

III．用法

1. 表示一个被动的动作发生在说话之前,强调对现在造成的影响和结果。

The door has been locked. 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。

IV.课堂小结

用被动语态改写下列句子。

1.

They have opened three training centers in this city by now. 2. We have built a new library and a gymnasium in our school this year. V.课堂训练

Ⅰ. 把下列主动语态转化为被动语态: 1. People play football all over the world. Football __________ all over the world by people. 2. Did they ask him some questions? _____________ any questions by them? 3. They warned Mary that the dog was dangerous. Mary ____________ that the dog was dangerousby them.

VI. HOMEWORK Finish off Exx. 1 & 2 on Page 57.