Learning about Languageppt课件配套教案内容

Book 2 Unit 3 Computers Learning about language Period 2: Discovering useful structures 一、教学目标

1. Make the students 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. 二、核心素养

1. Develop the students’ ability of using language

2. Arouse students’ interest in new inventions and enable them to talk about new inventions. 三、教学重难点

the Present Perfect Passive Voice. 四、教学过程

Step I Revision 1. A new house _______________(build) next year. 2. The classroom ______________(clean) by the students just now. 3. Many trees _________________(plant) on the hill every year.

一般现在时的被动语态结构：am/ is/ are+ 过去分词

一般过去时的被动语态结构：was/ were+ 过去分词

一般将来时的被动语态结构：will/shall + be + 过去分词

Step II Presentation

1. 将下列句子改成被动语态：

The soldiers have rescued a great number of survivors since the big earthquake.

改成：A great number of survivors have been rescued by the soldiers since the big earthquake. 2. 现在完成时的被动语态

（1）肯定句:

have/has +been+ done （2）否定句:

have/has + not +been +done （3）疑问句:

Have/Has +主语+ been + done

e.g. These books have been sold out. 否定句: These books haven’t been sold out.

疑问句: Have these books been sold out? 3. 现在完成时的被动语态通常表示下面两种情况：

(1) 表示过去开始的被动动作一直持续到现在, 句中经常有

in the past…years; for + 一段时间; since(+具体时间); so far等状语。

a. His Chinese has been improved a lot since he came to China. b. The topic has been talked about for a long time. (2) 表示被动动作在过去发生或完成, 但是对现在仍然有影响, 句中经常有already, yet 等状语。

a. The results of their experiments have already been published. b. The lost vase has not been found yet. 4. 注意事项：

(1) 在时间和条件状语从句中, 通常用现在完成时被动语态代替将来完成时的被动语态。

(2) 并不是所有动词都有被动语态

(3) 短语动词不可分割或省略其中的介词或副词。

Step III Consolidation Step IV Practice and exercises Step V Homework