人教版英语九年级unit 13 we're trying to save the earth section a

Unit 13 We

’

re trying to save the earth!Section A

Period 1 Section A 1a-2d

◆

教材分析

本单元带领学生了解一些有关地球污染，动物濒危等问题。并且教会大家如何保护濒危动 物，如何通

过回收再利用等方式来保护地球。本单元主要复习语法内容为：情态动词和动 词形式变化，主要带领学生

进行语法复习，巩固语法知识。

◆

教学目标

【知识与能力目标】

1.

掌握重点单词及短语。

2.

复习语法：

能正确区分和使用以下语法结构 ：

现在进行时，

现在完成时，

被动语态 ，

情态动词和

used

to

句型。

【过程与方法目标】

本课主要采用任 务型教学法，情景教学法以及多媒体辅助教学，充分发挥教师的主导作用和学生的主

体地 位。利用现代化教育技术优化教学过程，通过课件为学生创设更多生动活泼的语言环境，把学生吸引

到活动中去，并激发他们主动参与学习的欲望，努力培养学生自主学习的能力。

【情感态度价值观目标】

通过学习具有环境危机意识，学会关注环境保护环境。

【教学重点】

（

1

）能正确运用现在进行时，现在完成时，被动语态，情态动词和

< br>used to

句型。

（< /p>

2

）保护环境的措施方法。

【教学难点】

能正确运用现在进行时 ，现在完成时，被动语态，情态动词和

used to

句型。

◆

教学重难点

◆

课前准备

1.

准备录音机和磁带；

2.

设计课后巩固练习；

3.

ppt

；

◆

教学过程

Step 1. Presentation

Show the picture of the earth and tell students the earth is polluted now.

For example: (1) The factories that burn coal pollute the air with a lot of black smoke.

(2) Factories put waste into the river.

(3) People should throw away litter in the bin.

(4)There are more cars on the road.

Learn some new words.

Step 2. Work on 1a

Here are some words related to different kinds of pollution. Write them in the box below. Then

add more words.

loud music cars rubbish planes littering ships factories

smoking building houses mobile phones

noise pollution air pollution water pollution

____________ ___________ _____________

____________ ___________ _____________

____________ ___________ _____________

____________ ___________ _____________

Step 3. Listening

1. Work on1b. Listen and complete the sentences.

What was the problem?

The river was _____________. Even the bottom

(

底部

)

of

the

river

was

full

of

________.

There

were no more ______ for fishermen (

渔民

) to

catch.

What caused the problem?

People are throwing _______ into the river.

Factories are putting ______ into the river.

How should the problem be solved?

We should write to the ____________ and ask

them to ___________ the factories. Everyone

should help to __________ the river.

2. Listen again and answer the following questions.

1)

What does Tony want to do later this afternoon?

He wants to go swimming with Mark in the river later this afternoon.

2) Why doesn’t Mark want to go with Tony?

Because the river was

really dirty. Even the bottom of the river was full

of

rubbish, and

there were no more fish for fishermen to catch.

3) How was the river in the past?

It used to be so clean. It has been the nicest river in this town.

Step 4. Practice

1. Role-play the conversation in 1c.

Mark: The river was dirty. Even the bottom of the river was full of rubbish.

Tony: But it used to be so clean!

Mark: Yes, but people are throwing litter into the river.

Tony: Everyone in this town should play a part in cleaning it up!

2. Make conversations using the pollution in 1a.

A: The river has always been the nicest river in this town.

B: Yes, it used to be so clean.

A: But I was there last weekend and the river was really dirty.

B: What caused the problem?

A: People are throwing litter into the river.

B: What should we do?

A: Factories are also putting waste into the river.

B: Yes, everyone in this town should play a part.

A: We should write to the government and ask them to close down the factories.

B: What else can we do?

A: Everyone should help to clean up the river.

Step 5. Language points

1. We’re trying to save the earth! 我们正在竭尽全力拯救地球

!

try to do =try one’s best to do 努力去做某事。

e.g. We’ll

try

to finish the work in a week.

我们将努力在一周内完成这项工作。

2. Here are some words related to different kinds of pollution.

be related to

与…有关

the driver relate to the accident?

司机和这起事故有关吗？

3. .Even the bottom of the river was full of rubbish.

Yes, but people are throwing litter into the river.

litter

和

rubbish

都可指“垃圾”，用作不可数名词。

rubbish

指“没用的东西

(< /p>

被扔或将要丢弃的无用的东西)”不可回收。

litter

指“(室内或公共场所

)

乱扔的废物

(

纸屑、不要的包装纸、 废瓶等)”还可回收

e.g. Throw the rubbish out.

把垃圾扔出去。

The room is full of rubbish.

房间里堆满了垃圾。

Pick up your litter after a picnic.

野餐后将废弃物收拾好。

Step 6. Listening

1. Work on 2a. Listen to the interview. Circle the kinds of pollution that Jason and Susan talk

about.

A. land pollution B. air pollution

C. noise pollution D. water pollution

2. Work on 2b. Listen again and complete the sentences.

1) The air is badly polluted because there are ___________ on the road these days.

2) Factories that burn coal also ________ the air with a lot of black smoke.

3) There is also too much rubbish and waste. People _________________ things every day.

4) People are also littering in ______________ like parks. This is turning beautiful places

into ugly (

丑陋

) ones.

Step 7. Practice (Work on 2c)

Use the information in 2a and 2b to role-play conversations between Jason and Susan.

Jason: The air has become really polluted around here. I’m getting very worried.

Susan: Yes, I used to be able to see stars in the sky.

Jason: The problem is that…

Step 8. Discussion

Ask students what we should do to save the earth. Help students answer, turn off the

lights when you leave a room; stop riding in cars; stop using paper towels or napkins; recycle

books and paper.

Step 9. Reading

1. Read 2d and complete the chart.

Problems

Solving problems

air pollution

waste pollution

wooden (

木头的

) chopsticks or plastic forks

rubbish

2. Role-play the conversation.

Interviewer: Jason and Susan, what are your ideas for solving these problems?

Jason: Well, to cut down air pollution, we should take the bus or subway instead of driving.

Susan: Yeah, or ride a bike. There are other advantages (

优点) of bike riding. It’s good for

health and it doesn’t cost (花费

) anything!

Interviewer: Great ideas! What about waste pollution?

Susan: Mmm, I think simple things like bringing a bag to go shopping can help. I started doing

that a year ago.

Jason:

Me,

too.

Also,

I

never

take

wooden

chopsticks

or

plastic

(

塑料

)

forks

when

I

buy

takeaway

(

外卖食品

) food. I use the ones at home.

Susan: And remember to throw rubbish in the bins and keep public places clean and beautiful for

everyone.

Interviewer: So together, our actions can make a difference and lead to a better future!

Step 10. Language points

1. It’s good for health and it doesn’t cost anything!

cost v.

花费；使付出

指花费金钱，主语通常是物。

co st

的过去式和过去分词均为

cost

。

e.g. The new shirt cost Mr Wang 200 yuan.

王先生花了

200< /p>

元买了新衬衫。

How much does the new computer cost?

新电脑花了多少钱？

辨析

take, spend, pay & cost < /p>

take

，

spend

< br>，

pay

和

cost