Learning about Language教案评析

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: Step1: Revision (review the definition of Passive Voice) 动词的语态：主语和谓语之间的关系

主动语态：主语是谓语动作的执行者（发出者）

被动语态：主语是谓语动作的承受者。

Step2: Discovering Ask the Ss to discover the passive voice in the passage and fill in the blanks. _______1________((protect) wild animals is our duty. Because wild animals are important to us. But in the past few years, many wild animals_______2________(kill).

People kill them for their fur, skin, horns(角) and _____3_____(tooth). Besides, the environment ___4____ they are living in ______5______ (damage), too.

For example, with the development of cities, the using of insecticide(杀虫剂) and serious pollution, their living areas have become narrower and narrower.

Nowadays the number of the wild animals____6____ (be) becoming smaller and smaller.

So lots of wild animals have died ___7___. With time going by, many people have begun to realize the importance of protecting wild animals._____8_____(Lucky), many organizations ______9________(build) now and many good measures _____10_______ (take).

被动语态的两要素：be 的正确形式、过去分词

Step3: Discussion : learning the structure Give some explanations 1构成：

主动语态

被动语态

现在完成时

have/has done----------have/has been done 2.Filling the blanks with the right form of the verb. He has been sent to study the new technology in the company. He has been punished twice by the teacher for the same mistake. Have the windows been cleaned? 3. 只有及物动词才有被动语态，不及物动词（词组）没有被动语态, 如:happen, take place,

die, appear, disappear, fail, remain, lie, last, sit ,stand, break out, come true, belong to等．如：

What has happened to your brother? 4．但许多不及物动词加介词或副词构成的短语动词，相当于及物动词，也可以有被动语态。

但短语动词是一个不可分割的整体，变为被动语态时，不可丢掉构成短语的介词或副词。如：

The child has been taken good care of by Grandma Wang all these years.

A notice has been put up on the wall. Step4: Practice and exercises

1.Change the following sentences into the Present Perfect Passive Voice. 1). We have completed all the preparations for the task, and we’re ready to start.

2). This company has produced

new types of computers. 3). They have interviewed several teachers for the job. 4). George has sent some texts and pictures to his friend’s cellphone.

2. Give The Ss the situation : Get into groups of four. Your task is to decide what has been decided for the class .Take turns to make the ideas as interesting or as lively as you can. 3. Give the Ss some examples:on Saturday.

S2:It has been decided that those who keep the classroom tidy should be allowed to go home early everyday. S3:It has been decided …

S4:…

4.

Ask them to collect the ones they all like best and be prepared to tell them to the class. Step 5: Homework 1.Finish Exercise 1 on P57.

2.Revise the Present Perfect Passive Voice.

S1: It has been decided that those who do not do their homework will be asked to return to school