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Unit1 Great Scientists period2  

2010-01-16 08:54:16|  分类: 默认分类 |  标签: |举报 |字号 订阅

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第一步 引入话题

Let students name some great scientists. And then ask them to try the quiz on Page1 and find out who knows the most.

Answers:

1. 浮力定理 — 阿基米德

 

Archimedes

2. 生物进化论 — 达尔文

 

Charles Darwin

3. 蒸汽机 — 纽科文 Thomas Newcomer

James Watt improved it in the 1770s and turned it into the first modern steam engine used on the railway.

 

the first steam engine

4. 遗传学 — 孟德尔

 

Gregor Mendel

5. 镭的发现者 — 居里夫人

 

Marie Curie

6. 电 — 爱迪生

 

Thomas Edison

7. 达芬奇

     

Leonardo da Vinci         Mona Lisa         Last Supper

8. 矿工安全灯 — 汉弗来.戴维爵士

   

Sir Humphry Davy    Miner's Safety Lamp

9.地动仪 seismograph — 张衡

   

Zhang Heng       Seismograph

10. 黑洞理论 — 斯蒂芬·霍金

 

Stephen Hawking

第二步 学生活动(小组竞赛)

1. Divide students into groups of four and let them find what quality a scientist should have. Each student can give one adjective, and then name a scientist who has such a quality. Then see which group can find the most.

For example:

Student1: Careful      Copernicus

Student2: Strong determination      Stephen Hawking

Student3: Creative      Albert Einstein

...

2. Ask two or three groups to show their opinions.

3. Tell students they will learn another scientist: Carl Linnaeus,and then introduce the background information about him.

Carl Linnaeus (1707–1778) lived and worked in Sweden. He succeeded in classifying kinds of plants and animals. His classification has proved very successful and is still used today.

 

Carl Linnaeus

第三步 听力训练(双人活动)

The purpose of the listening is to introduce the work of Carl Linnaeus to us. They should understand why his work was important to the development of biology, yet he is not well-known.

1. (Page 41 Listening) A

第一步 作业检查

1. Check their homework and remind them of what they learnt in the last period.

2. 让学生相互交换所写的小文章,注意语言的准确性,选出本组最佳文章、好的语句,课后老师收集、整理,进行张贴,大家共享、共赏。(四人一组活动)

第二步 查找探究(双人活动)

1. Ask students some knowledge about the past participle.

2. Get students to find out the sentences with the past participles from the reading passage.

① Doctor John Snow was a well-known doctor in London...

② So many thousands of terrified people died every time there was an outbreak.

③ John Snow told the astonished people in Broad Street to remove...

④ But he became inspired when he thought about helping ordinary people.

⑤ Neither its cause, nor its cure was understood.

⑥ He got interested in two theories.

3. Let students work in pairs to translate these sentences, trying to understand the usage of the past participles.

第三步 理解归纳 (四人小组活动)

Page 4 Discovering useful structures Exercises 1, 2 & 3.

1. Ask students to finish the exercises of how the past participles are used.

2. Students draw a conclusion of the usages given here in groups or four.

3. Teachers give necessary explanation and some more general usages of the past participles.

过去分词是非谓语动词的一种形式,表示完成和被动的动作。它在句子中可以充当表语、定语等成份。下面仅谈其作定语和表语的用法。

一、过去分词作定语

过去分词作定语有前置和后置两种情况。

1、前置定语

单个的过去分词作定语,通常放在被修饰的名词之前,表示被动和完成意义。

A类:被动意义:

an honored guest 一位受尊敬的客人

The injured workers are now being taken good care of in the hospital.

受伤的工人现正在医院受到良好的照料。

B类:完成意义:

a retired teacher 一位退休的教师

They are cleaning the fallen leaves in the yard.

他们正在打扫院子里的落叶。

2、后置定语

过去分词短语作定语时,通常放在被修饰的名词之后,它的作用相当于一个定语从句。如: This will be the best novel of its kind ever written (=that has ever been written). 这将是这类小说中写得最好的。

Who were the guests invited (=who had been invited) to your party last night?

昨晚被邀请参加你的晚会的那些客人是谁呀?

二、作表语

过去分词作表语并无“完成”或“被动”之意,而是表示主语的状态或思想感情等。例如:

He looked worried after reading the letter. 看完信后,他显得很忧虑。

When we heard of the story, we were deeply moved. 当我们听到这个故事时,被深深地感动了。

He seemed quite delighted at the idea. 听到这个想法,他似乎很高兴。

常见的作表语的过去分词有:

amused (愉快的); connected (连接的); broken (碎了的); closed (关闭的); astonished (吃惊的); covered (覆盖的); crowded (拥挤的); delighted (高兴的); disappointed (失望的); dressed ( 穿着的); drunk (喝醉的);experienced (有经验的) ; gone (遗失的);lost (丢失的); worried (担忧的); interested (感兴趣的); tired (疲劳的); pleased (高兴的); satisfied (满意的); surprised (吃惊的); married (已婚的); known (著名的),等等。

注:过去分词作表语不要与被动语态混为一体。分词作表语表示主语的状态,而被动语态则表示被动的动作。例如:

My glasses are broken. 我的眼镜碎了。(状态)

My glasses were broken by my daughter. 我的眼镜被我女儿摔碎了。(动作)

On the earth, 70% of the surface is covered with water. 地球表面70%是被水覆盖的。(状态)

I was greatly surprised by a knock at the door. 敲门声使我大为吃惊。(动作)

第四步 巩固应用 (小组竞赛)

Page44 Using structures

1. Ask students to go through the exercises as quickly as possible.

2. Give students 5 minutes to finish the work.

3. Give them a few minutes to discuss in pairs.

4. One student from each group gives their answers to the class to see which group can get the highest mark.

5. Check their answers.

第五步 随堂小测

Choose the best answer.

1. Most of the artists ______ to the party were from South America. (MET1990)

A. invited  B. to invite  C. being invited  D. had been invited

2. Cleaning women in big cities usually get ______ by the hour. (NMET1998)

A. pay  B. paying  C. paid  D. to pay

3. The first textbook ______ for teaching English as a foreign language came out in the 16th century.

A. having written  B. to be written  C. being written  D. writ

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