Learning about Language名师教学设计2

Book2 Unit3 Computers教学设计

----the Present perfect passive voice Teaching Content: Unit 3 Grammar，the Present perfect passive voice Teaching Aims: 1.Learn about the function of the present perfect passive voice; 2.

Change the sentence into the present perfect passive voice correctly. Teaching Important Point: the use of the present perfect passive voice Teaching Difficult Point: Correctly change the sentence into the present perfect passive voice

Teaching Procedure:

Step 1: 由被动语态的基本构成复习几种常见时态的被动语态形式

1.

被动语态的基本构成：be + V-ed ①一般现在时的被动语态：am/is/are + V-ed eg. This song is often sung by children. 一般过去时的被动语态：was /were + V-ed eg. This song was sung by children many years ago. ③一般将来时的被动语态：will/shall be + V-ed eg. Many buildings will be built next year. Step 2: 观察下列句子，归纳出现在完成时被动语态的结构

①Over

time I have been changed quite a lot. First as a PC, and then as a laptop I have been used in offices and

homes since the 1970s. ③…

I never forget anything I have been told ! ④Since the 1970s many new applications have been found for me. ⑤I have also been put into robots and used to make mobile phones…

⑥I have even been put into space rockets and sent to explore the Moon and Mars. 总结：现在完成时的被动语态：has/have been+ V-ed，“已经被...”

Step 3: 现在完成时被动语态的用法

(1)

复习动词的过去式和过去分词的变化规则

(2)

分析例句，总结现在完成时被动语态的用法

eg. The machine has already been repaired. 总结：①动作发生在过去；

②到现在已经完成；

③或对现在有影响；

④这个动作是被动的。

eg. The machine has been used for 3 years. 总结：①动作发生在过去；

②持续到现在；

③可能持续下去；

④这个动作是被动的。

eg. You can go home as soon as your homework has been finished. 总结：在时间和条件状语从句中，表示将来某时已经完成的动作。

(3)

现在完成时被动语态用法小贴士：

Tip:现在完成时常与up to now/so far(至今，到目前为止), already(已经),

yet(已经, 然而), recently(最近), just(正好，只是)等表示时间的词连用。

Step 3: 练习

(1)练习1：把下列句子中的主动语态变为被动语态；

(2)练习2：单句改错(3)练习3：语法填空

(《练习册金版学案》P38，Ⅱ) (《练习册金版学案》P38，Ⅲ)