Learning about Language教学创新设计

Unit 3 Computers The 3rd period: learning about Language ---the Present Perfect Passive Voice Goals: 1. Learn the Present Perfect Passive Voice. 2. Help the students master the way of using the correct voice, telling the differences between the active voice and the passive voice. Teaching Procedures: Step 1:Lead-in 1.

Guess: who I am? (show pictures)

A handbag? A toy? No ,I am a computer.

Step2: Using the words and phrases 1.Ask the Ss “Do you remember the history of computer last class”and review the history of computer. 2.Ask the Ss

“Do you know where I come from”.and present phrases:technological revolution. 3.Ask the Ss “Do you know what I do”.and let students answer the question. 4.Now ,let’s look at other applications(用途）

（1）download下载

Many nice songs have been downloaded by computers.(许多好听的歌曲已经被电脑下载好了。) （2）calculate计算

This maths problem has been calculated by the computer.（这个数学问题已经被电脑计算出来了。）

（3）solve(解决)the medical problems The medical problems have been solved by

the computer.（医学问题已经被电脑解决了。）

（4）surf the Internet But I need network. A piece of news has been found by her. （一条新闻被她找到了。）

Step3:Practice Complete the passage with the words below. download;solve;network;calculate;technological revolution; d

Hello, boys and girls! I am Dell. I come from a (技术革命).I am very helpful. I can help them (计算)maths problems. I have (解决)many difficult problems. Besides, I can (下载)songs and information.I can also be used for watching DVD, sending e-mail and communicating ,but I need (网络) . I like to help human beings.I am a devoted friend. Step4: Discussion : learning the structure Give some explanations and let students summarize the structure. eg.Many nice songs have been downloaded by computers. eg.The medical problem has been solved by the computer. Present Perfect Passive Voice(现在完成时的被动语态)：

have/has been +P.P(动词的过去分词) Step5: Practice and exercises 1.Look at pictures and finished sentences using the Present Perfect Passive Voice. 1).A snowman by me . 2).A lot of tomatoes by Sam. 3).The bedroom by Lily . 4).The dinner by Bob . 5).Some clothes by Sarah . Step6:Summary Present Perfect Passive Voice(现在完成时的被动语态)：

have/has been done(动词的过去分词)

Step7: Homework 1.

Try to remember the grammar rules and do exercises 1,2,3 on page 21. Step8:Blackboard Design

technological revolution download Applications calculate solve

surf the Internet

network

现在完成时的被动语态:have/has been +P.P(动词的过去分词)

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