高二英语教案：外研版必修3 Module4复习学案

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Module Four

Sandstorms in Asia

reading and vocabulary

Step 1 Pre-reading

a. Look at the photo and answer the following questions.

1. Get Ss to come up with as many words as possible

while looking at the picture.

2. What is happening?

3. What is the cyclist wearing and why?

4. What do you think happened to traffic in this situation?

Why?

5. What do you think experts advise people to do in this

situation?

b. Predication

If you are to write the article named “Sandstorms in Asia”, how many parts will you include in it? What will you write in each part?

Step 2 While-reading

a. Skimming and scanning

Read the passage quickly and fill in the diagram with one proper word.

Part 1(Para1) d__________

Part 2(Para2-5) c_______

d_______

S_______

i________

s________

Part 3(Para.6) m________

b. Detailed Reading

1)Read the passage carefully and answer the following question.

1 What are sandstorms?

2 In what places do they often happen?

3 What does Ren Jianbo’s example tell us?

4 Are there sandstorms in China? Where?

5 Have sandstorms in China increased or decreased recently? Why?

6 Why does traffic move slowly during the sandstorm?

7 What does the government do to protect Beijing from sandstorms?

2) Read the passage carefully and then fill in the chart with suitable words.

Parts Content Details

1 major disaster

2 description

Cause

influence

suggestion

3 measures

Step 3 Post-reading

a. Decide if the following statements are true ( T ) or false( F ).

①Scientists have tried many ways to deal with sandstorms

②Land becomes desert only because people cut down trees and dig up grass.

③The Chinese Central West Station can not forecast sandstorm before it comes.

④The desert is 25o kilometers away to the west of Beijing. So there is no need to take some measures.

⑤ Southwest China is part of the sandstorm center in Central Asia.

b. Read the text again and complete the following sentences

1.The winds in a sandstorm can sometimes______________________________

2.When Ren jianbo was living in Inner Mongolia ______________________________

3.Sandstorms in China appear to have increased ______________________________

4.Cutting down trees and digging up grass can______________________________

5. Traffic moved slowly because ______________________________

6.The government is planting trees to the west of Beijing to______________________________

Step 4 language explanations

1 mass adj. 大规模的 a mass campaign 一场大规模的战役

n. 团,块,堆

a mass of clouds /hot air

a mass of =masses of 许多,大量

the masses 群众

2 be caught in 被困于…,遇到…

He was late for work yesterday afternoon because he was caught in the traffic jam.

Charles Chaplin was once caught in a snowstorm for several days.

3 appear v. 1) 出现,出版,发行

His book will appear in the bookshop next week.

A smile appeared on his face when he heard the good news.

2) 看起来,似乎。 系动词

She appeared very tired.

She appears to want to leave.

4 prevent somebody from doing, stop somebody from doing,

keep somebody from doing

阻止某人做某事。

Note: keep sb. from doing 中from 不可以省略, 因为keep sb. doing 意为：让某人一直做某事。其他两个词组中from省略后意思不变。

I’m sorry to keep you waiting so long. 很抱歉让你等了这么久。

We must keep him from complaining all day.

我们不能让他整天抱怨了。

grammar

不定式

Step 1 Presentation

Look at the examples a-f. The underlined phrases are examples of different types of infinitive.

a. The wind is strong enough. It can move sand dunes.

The wind is strong enough to move sand dunes.

b. We were advised, “ Don’t go outside.”

We were advised not to go outside.

c. I’m cycling to work in a sandstorm and it’s frightening.

I’m frightening to be cycling to work in a sandstorm.

d. There is nothing anyone can do.

There is nothing to be done.

e. I am the only person in my family who has been in a sandstorm.

I am the only person in my family to have been in a sandstorm.

f. I’ve been caught in a sandstorm. It was a terrible experience.

To have been caught in a sandstorm was a terrible experience.

Step 2 Explanations

I 动词不定式的时态和语态形式

时 态 主 动 被 动

一般式 to do to be done

进行式 to be doing

完成式 to have done to have been done

1. 动词不定式的一般式：表示与主动词处于同一时间层面或动作发生于主动词之后。

eg: He seems to understand what I said

I hope to visit Paris again.

2. 动词不定式的进行式：表示与主动词同时发生且动作正在进行。

eg: The two cheats pretended to be working hard.

3. 动词不定式的完成式：表示不定式动作发生于主动词之前。

eg: She seems to have seen this film.

He happened to have gone out when I went to see him

4. 动词不定式的被动式：表示与逻辑主语之间的被动关系。

eg: The meeting to be held tomorrow is about how to stop the pollution.

I want to have been told the news earlier.

Ⅱ动词不定式的句法功能

不定式的句法功能是做主语，表语，宾语，宾语补足语，主语补足语，定语，目的状语和结果状语，分别给出一个例句 ：

1) To master a foreign language is necessary for a college student.

(主语)

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