现在完成时的被动语态结构和规则

教学目标：

1．语言知识目标: 掌握现在完成时的被动语态结构和规则

2．语言技能目标：运用现在完成时的被动语态进行交流

3．情感态度：学生能自如地表达自己的思想，情感以及与人合作交流的能力。4．学习策略：通过主动语态和被动语态的比较，以及现在完成时的应用培养学生的认知策略；引导学生对自己学习过程，学习困难等进行分析，培养学生的调控策略；鼓励学生运用现在完成时的被动语态，在情景中进行交流，培养学生的交际策略。

重点难点：

1．教学重点：现在完成时的被动语态结构和规则，主动语态和被动语态的转换。2．教学难点：现在完成时的被动语态的应用，通过合作交流表达思想和情感。

课堂教学过程设计：

Step 1 Preparation（发现准备阶段）

(Before class, let Ss enjoy some pictures about specially-designed computers)

T: Now, I’d like you to make an interview with your partner. One is the reporter, and the other is Mr. / Miss Computer.

Write some key sentences on the blackboard:

(1) As the years have gone by, the computer has been made smaller and smaller.

(2) Since then, my family and I have been used by millions of people to deal with information and communicate with each other around the world by the Internet.

(3) I have truly been built to serve the human race since my birth.

设计说明:由记者采访导入新课，激发学习兴趣，呈现现在完成时的被动语态。

Step 2 Presentation(呈现体验阶段)

I.初步体验

T: Nowadays, computer has been used more often than ever before by the students. Then, what has it been used to do in our life? (Show some pictures)

Help the students to describe the pictures, using the present perfect passive voice.

S1: Computer has been used to chat with my friends.

S2: Computer has been used to send E-mails to my friends.

S3: Computer has been used to gather information.

…….

设计说明：计算机，高中生最感兴趣的话题之一。兴趣使学生积极大胆参与和教师的交流，在谈论计算机的用处时，学生通过has been used这一短语体验现在完成时的被动语态。

II.呈现阶段

Together with the students，the teacher summarizes the use of the structure.

教师点拨语法特点并提醒重难点：

一. 被动语态的形式是be done,

二. 现在完成时经常与Since, for, yet, already, so far, by now, in the past few years, how long等词连用，

三. 助动词的选择have/has 要与主语一致。

III.再次体验

Fill in the blanks, using correct tense and voice:

1．I don’t know how many days I have been given (give) to spend, but I do feel my hands are empty.

我不知道他们给了我多少日子，但我的手确乎是渐渐空虚了。－《匆匆》

2. Never mention rope in the house of a man who has been hanged. (hang)不揭别人的短处。

3. The year that is drawing towards its close, has been filled (fill) with the blessings of fruitful fields and healthful skies.

林肯总统1863年感恩节贺辞

4. Peace has been preserved (preserve:维护)with all nations, order has been maintained, (maintain:维持)the laws have been respected (respect) and obeyed, and harmony has prevailed (流行，盛行 )everywhere.

林肯总统1863年感恩节贺辞

设计说明: 在发现和归纳的基础上，利用学生喜欢的经典句体验语法结构和功能，让学生发现语法术语不能单独表意，只有在具体的情境中，才能表情达意。

Step 3 Practice（实践阶段）

I. Game:

Task: Describe what has happened in the pictures （展示图片）

Requirements: 1. Use“have / has been done”;

2. “One person, one chance”---Everyone has just one chance.