Learning about Language公开课参赛课教案

Book2

Unit3 Grammar 现在完成时被动语态

班级:_______姓名:________小组:_______评价: ________ 【学习目标】

1.

复习初中阶段所学的有关现在完成时的知识。

2.

学习现在完成时的被动语态的结构和用法。

【重点难点】

1.现在完成时的被动语态的结构和用法[来源学科网ZXXK]

2. 被动语态中的特殊用法和注意事项。

【导学流程】

Step1

复习旧知

(复习现在完成时) 现在完成时主要用来表示现在已完成某事，或过去发生的动作一直持续到现在。由

“_____

________”

构成。

用法：

一、动作在过去发生或完成，对现在有影响。

例如：

1. I have just had my breakfast 2.I have just cleaned my clothes.

通常与表示包括现在在内的时间副词

just（刚刚）, before（以前）,already（肯定句：已经）, yet（一般疑问和否定句：还），

never（从不）, ever（曾经）等状语连用。

二、

动作从过去开始一直延续到现在，还有可能会继续延续下去。通常和

for（+一段时间）, since（+时间点）

引导的时间状语连用,以及

so far, by now, these days, in the last few years, recently, lately, over 等连用。

三、

动作在说话前已经发生过一次或多次发生，现在已成为了一种经历。此种句式中常常

带有once, twice,

three times, never, ever, before等时间状语。表示“第几次做什么”的句子It/This is the first time that 从句里也用现在完成时。

【及时练】

1. I __________ (see) her these days.[来源学科网ZXXK]

2. She _________ (learn) English for 3 years. 3. They ________ (live) here since 1990.

4. What _________ (happen) to the USA in the last few years? 5. I ______ never ______ of him before. (hear)

6. _______ you ever ______a horse? (ride)

7. She ______already _______her homework. (finish) 8. I_____ never ______ her as angry as that, so I kept

quiet. (see)

[来源学科网]

Step2

学习新知

（现在完成时被动语态）

1.

现在完成时被动语态的构成（以动词finish为例）

现在完成时

主动语态

被动语态

观察并总结谓语动词的构成形式：

1).

The results of their experiments have already been published. 2).

The party has been planned since the new year. 3).

They haven’t been told about it yet. 4).

—Have his books been sold out?

—Yes. So you can’t buy one now.

5).

How many experiments have been done by the students this month? 总结：

1). 肯定式：_____________________ 2). 否定式：___________________ +过去分词

3). 一般疑问句形式：______________________+过去分词

4). 特殊疑问句形式：_________________________________

2、用法

现在完成时的被动语态通常有以下两种情况：

1）表示过去开始的被动动作一直持续到现在，常与之连用的时间状语有：for+一段时间，since+时间点/时间状语从句，these days, so far, up to now, in the last / past few years等。

【及时练】

用括号内单词合适形式填空：

①

This class________________ （teach）by Mr. Brown for two years.

②

His Chinese_________________(improve)a lot since he came to China.

③

JK Rowling’s novels___________________ (translate) into many foreign languages so far.

2）表示某被动动作对现在造成的影响或结果，常与already, yet, just, ever, never, recently等连用。

【及时练】

①

The bike_____________________(repair) yet.

②

I_

____ already_______________ (introduce) to Mr. Smith.

3. 注意

1).动词短语是一个不可分割的整体，在被动语态中要保持其完整性，其中的介词或副词不可省略。

The orphans________________________ here．

孤儿们在这里受到很好的照顾

2). 现在完成时与一般过去时的区别：

一般过去时所表示的动作与现在没有关系，它所表示的动作纯属发生在过去，可以与具体的过去时间连用。现在完成时表示的事情与现在有关，对现在有影响，不能和具体的表过去的时间状语连用。

He ________ (work) here 3 years ago.

He ________ (work) here for 3 years.

Step 3. 迁移运用

用所给动词（短语）的正确形式填空。

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 Olympic Games. [来源学科网]

5. This topic _____________________ (talk about) for two hours.

[来源:Zxxk.Com]

Step 3. Careful reading

Task 3. Read the passage carefully and finish the timeline below.

Task 4. Read the text carefully and judge the following statements TRUE (T) or FALSE (F).

1. Computers developed very quickly, first as a calculating machine and then as an analytical machine. (

) 2. It marks the beginning of “artificial intelligence”

in the computer history that the computer

that the computer could “think”

logically. 3. The computer hasn't been used in offices and homes until the 1970s. (

) 4. Alan Turing wrote a book about how the computer could be made to work as a “universal machine” to solve any difficult mathematical problem in 1936. (

) 5. The computers were first connected by a network in the late 1960s. (

)

堂测堂练

课文语法填空

_

_is known to us all that the computer is one of the most important inventions in the 20th century. Though it’s____

___ (wide) used in our daily life, it began only as a calculating

machine in 1642. In 1822 the analytical machine was made by Charles Babbage. At that time, after the computer was programmed by _____ operator who used cards with holes, it could “think” logically and produce an answer ___

___ (quick) than any person. __

__time went by, the computer has been made smaller and smaller, quicker and quicker. Later, the single computer was connected with each other. The information could be shared. Since the 1970s many new ___________(application)have been found for the computer. It has become very important in _______________(communicate), finance and trade. The computer is a ________ (devote)friend and helper of the human race!