Learning about Languageppt课件课堂实录

Unit 3

Computers

learning about

languages教学设计

教学目标

1.

通过自主预习使学生回顾已有的有关现在完成时以及被动语态的基本用法。

2.

合作探究使学生了解现在完成时被动语态的基本用法和结构

3.

通过课后巩固掌握现在完成时被动语态的常用用法

教学步骤

1.自

主

预

习

用所给词的适当的时态、语态填空。

1．Over time I ____________________(change) quite a lot. 2．First as a PC and then as a laptop，I ________________(use) in offices and homes since the 1970s. 3．Since the 1970s many new applications __________________(find) for me. 4．I __________also __________(put) into robots and __________(use) to make mobile phones as well as help with medical operations. 5．I __________even __________(put) into space rockets and __________ (send) to explore the Moon and Mars. 2.合

作

探

究

一、现在完成时的被动语态的基本用法

1．基本概念。

现在完成时的被动语态强调一个发生在过去的被动性的动作，动作已完成并强调对现在造成的影响或结果，主语和谓语之间为被动关系。

①The new school has been set up. 新学校已经建成了。

②I have been employed at the job since 2000. 自从2000年，我就做这份工作。

2．基本构成。

现在完成时的被动语态的结构为has/have been done。主语为单数时用has been done，而主语为复数时则用have been done。

①The experiment has been done successfully. 这个实验做得很成功。

②His novels have been translated into several languages. 他的小说已被译成了几种语言。

3．现在完成时的被动语态的各种句式。

肯定式

否定式

一般疑问式

特殊疑问式

主语＋have/has been done... 主语＋have/has not been done... Have/Has＋主语＋been done...？

特殊疑问词＋have/has＋主语＋been done...？

①He has been admitted to the club. 他已被接纳为俱乐部成员了。

②Tom's novel has not been published. 汤姆的小说还没有被出版。

1

③Has his bike been repaired?

他的自行车修好了吗？

④Who has been invited?

谁受到了邀请？

名师点拨

(1)since then，since＋从句，so far，by now，up to now，recently，lately，already，yet，in the last/past＋时间段等常用于现在完成时的句子中。

(2)非延续性动词，如borrow，finish，begin，start，buy，marry，open，join等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思，则要变换动词或时态。

Since the products were put in market，they have been well received. 自从这些产品被投入市场，它们已得到好评。

这本书已借了两周了。

The book has been borrowed for two weeks.[F] The book has been kept for two weeks since it was borrowed.[T] 3.及时巩固

将下列句子变为被动语态。

①They have carried out the plan since last month. →The plan ___________________since last month. ②The host has invited all his guests to the party. →All his guests _________________to the party. 根据要求改写句子。

③Those old homeless men have been well looked after. →Those old homeless men ___________________________.(否定句) →

_______those old homeless men ____________________ ？(一般疑问句) 单句改错。

①She has been made study the material for almost a month.(

) ②The little baby has been taken good care.(

) ③They worked on the important plan in the past two years. (

)

2