Learning about Language第二课时 公开课

Grammar: The Present Perfect Passive Voice

教学设计

I. Teaching objectives 学生能够知道什么情况之下必须用现在完成时的被动语态，并且能够正确掌握现在完成时的被动语态的形式，能够把一个现在完成时态的句子转换成被动语态。

II. Teaching Important and Difficult Points 让学生了解现在完成时的被动语态的格式和主动语态与被动语态之间的转换。

III Teaching Procedure Step I Show the students when we should use the present perfect passive voice . 1.发生在过去的动作对现在产生的结果或影响，而且这个影响是被动的。

Eg: Much money has been spent to protect the farmland by now. 2.在过去发生，一直延续到现在并且可能持续下去的被动动作或状态。常与for 或since 引导的时间状语连用。

Eg: The machine has been used for three years. Computers have been used in communication since the 1970s. 3. 用在时间或条件状语从句中，表示将来某时已完成的动作。

Eg: You can go home as soon as your homework has been finished.

Step II. Pick out the sentences in the present perfect passive voice from the reading passage. (L.1) Over time, I have been changed quite a lot. (L.17) …I have been used in offices and homes since the 1970s. (L.21) I never forget anything I have been told! (L.26) ...have been found for me. (L.28) I have also been put into robots and used to …

(L.30) I have even been put into space rockets and sent to…

Step III. Work out the form of the present perfect passive voice from the sentences above. 现在完成时

have done has done have been done has been done have not been done has not been done 现在完成时的被动语态

现在完成时被动语态的否定式

Step IV Practice Practice1: Book2 P21 Change the following sentences into the present perfect passive voice. 1.

My friend has bought a new PC.

2.

The shop has repaired my computer very quickly. 3.

An unknown virus has just attacked my computer. 4.

We have not solved the problem yet. 5.

The company has given its computers away to a local school. 6.

The scientists have developed a kind of intelligent robot. Read aloud after checking. Practice2: Read aloud and find out the present perfect passive voice. Look at the way your face has been washed Look at the way your hair has been combed Look at the way your shoes have been cleaned You’d better do them again

Look at the way the flowers have been planted Look at the way the grass has been cut Look at the way the paths have been swept I hope that you’ll come here again

Practice3: Fill in the blanks with proper forms. 1.

The children _____________ (tell) many times not to go near the river. 2.

In the last few years thousands of films ________________ (produce) all over the world. 3.

Jenny ______________ (make) rapid progress recently and is always being praised by the teachers. 4.

Great changes ________________ (take place) in our country since the 2008 Olympics. 5.

This topic _______________ (talk) about for 2 hours. 6.

We can’t go to the school play tonight. All the tickets _____________ (sell) so far. 7.

This custom _____________ (hand) down since the 18th century. 8.

The pizza _____________ (make) by my mother just now. Would you like to have some? 9.

This book _____________ (like) by those people who are interested in modern culture. 10.

- Your job ____________ (keep) open for your return. - Thanks. 11.Up to now, 12 trees _____________ (pull) down in the big storm.

Practice4: Change the sentences into passive voice. 1.

Kate has paid the bill. 2.

The police have not caught the thieves. 3.

Have they noticed us? 4.

Who has done this?

StepⅤ.Homework 课时训练： P23 I，II

教学反思

经过教学实践，我认识到要让学生掌握一种语法，首先是要告知他们该语法的用法，那么，通过查找课文中相应的语法句子的这种方法是很实用的；其次是要通过大量的练习来让学生熟练和巩固该语法知识；最后是要通过朗读来增强学生的语感。

专家点评

以学生为主的语法课，练习充足，学生参与度高，达到了预期的效果。