英语九年级上册Unit 3 Language in use教学ppt课件

设计说明

本单元主要复习构词法。通过分析单词的结构和意义，归纳派生法、合成法，并拓展转化法。通过派生单词、选词填空、完成句子，提高学生对单词、短语、句型、语法等知识的实际运用能力。然后通过听录音、问答、讨论、展示，让学生动脑、动耳、动口、动手，巩固所学知识。

教学目标

通过本单元的教学，让学生达成以下目标:

1. 知识目标

（1）复习本模块重点的新单词、短语及句型。

（2）复习巩固构词法的用法。

2. 能力目标

能够根据已学词汇，正向/逆向猜测与之相关的合成、派生、转化词义。

3. 情感目标

对世界上现存的污染问题有较深的了解，并积极提出解决污染问题的建议。

重点难点

重点：本模块的重点单词、短语和句子

难点：根据构词法猜测词义

教学准备

PPT课件，教材活动8、9的录音

授课时数

1课时

教学过程

Step 1  Revision

Ask the students to read the new words and expressions in Module 12.

Step 2  Language practice

1. Reuse means “use again”.

2. Though pollution is heavy now, I don’t think it’s hopeless.

Step 3  Grammar

构词法

1. 合成法

将两个或两个以上独立且语意不同的单词合在一起构成新词的方法称作合成法。

2. 派生法

通过在词根前面加前缀或在词根后面加后缀构成新词的方法称作派生法。

3. 转化法

英语构词法中把一种词性转换为另一种词性而词形不变的方法称为转化法。

（1）动词转化为名词

 talk v. 谈论   n. 谈话

（2）名词转化为动词

 water n. 水　v. 浇水

（3）形容词转化为名词

light adj. 明亮的　n. 光线

Step 4  Practice

1. Make new words. Join the parts of the words in Box A with the words in Box B. You need to use some of the parts more than once.

Put students in pairs to make as many new words as possible.

Answers：careful   careless    collectable  recollect  hopeful   hopeless

impossible    reuse    usable  useful   useless    unusual

unwanted    wasteful

Now work in groups. Play the guessing game English for Fun.

（1）Put students in groups of four.

（2）Tell students they are going to play a guessing game. Groups have to match words from the first step in Activity 1 to the definitions. The first group to finish should put their hands up or shout“Guessed it!”All groups should then stop writing.

（3）Check the answers as a class.

2. Complete the sentences with the words in the box.

（1）Ask students to read the sentences and check the meaning.

（2）Tell students to complete the sentences using the words in the box, and then

compare answers with their desk partner.

1 Polluted water is _________.

2 It is _________ to throw so much food away.

3 If you look after things well, you may _________ some of them later.

4 It is _________ to clean up the whole river in such a short time.

5 If we pay attention to pollution now, the future will be _________.

Answers：1 unhealthy    2 wasteful    3 reuse    4 impossible

5 hopeful

3. Complete the table.

（1）Put students in pairs to complete the table.

（2）Check the answers as a class.

4. Complete the sentences with the correct form of the words in Activity 3.

Ask students to read and complete the sentences with words from the table.

She was hopeful that her new job would make her more successful.

1 The factory ________ the river, and the fish died.

2 We often walk in the countryside. It is a（n）_______ activity for us.

3 Do not use so much water. It is very ________.

4 To keep the flowers growing, you need to _______ them once a day.

Answers：1 polluted    2 usual    3 wasteful    4 water

5. Complete the sentences.

（1）Ask students to read the example sentence and tell you which two words

the answer is made up of（lunch + box）. Point out that this is a very common method of making words in English.

（2）Ask students to complete the remaining sentences.

A lunchbox is a box that you keep your lunch in.

1 A __________ is a card that you write on one side of and send to someone by post.

2 A __________ is a room where you have classes at school.

3 A __________ is a book that has one or more stories for children.

4 A __________ is a black board that is used at school for writing on with chalk.

Answers：1 postcard    2 classroom    3 storybook    4 blackboard

Step 5  Speaking

Work in pairs. Look at the pictures and answer the questions.

1 What kind of things can be recycled?

2 How can these things be reused?

3 How does this help the environment?

4 Have you ever recycled or used things that can be recycled? How?

Answers（Just for reference）：

1 Cloth, paper, cans, plastic, glass, etc.

2 Recycled paper can be used for notebooks, tickets or writing paper.

3 It helps save a lot of resources and reduce greenhouse gas emissions.

4 Yes. I recycled aluminum cans and paper by selling them to the recycled factory.

Step 6  Exercise

Complete the conversation with the correct form of the expressions in the box.

Mike: I hear you are off to the Caribbean for a holiday! Lucky you! But aren’t

 you （1）_____________ the pollution that such long plane journeys may

 cause for the environment?

Ken: I know, but what can I do about it? I’ve already tried my best to protect the environment. I recycle. I don’t （2）__________ things if I don’t want them any more. I （3）__________ the lights when I leave a room. Don’t tell me I shouldn’t travel by plane any more!

Mike: No, of course not. But we can do more to protect the environment. For example, we can help keep the air clean by planting trees. Trees （4）________ the environment. In this way, we can reduce the harm of pollution.

Ken: Good! So I can enjoy my holiday, and when I come back, I’ll plant some trees!

Mike: That’s the idea! Maybe we can all join in and start a small forest!

Answers：（1）worried about   （2）throw away   （3）turn off

（4）are good for

Step 7  Listening

1. Listen and check（√）the true sentences.

（1）Tell students they are going to listen to a passage about how to reduce, reuse and recycle.

（2）Let students read through the sentences first. Ask them to predict which sentences are likely to be true in the listening passage.

（3）Play the recording for students and check the correct sentences.

1 It is OK to throw used things away. Looking after them takes a lot of time.

2 Do not throw away things made of glass, plastic and paper, but recycle them when possible.

3 Take a bag when you go shopping.

4 Producing electricity and using oil will not cause pollution.

5 Turn off lights when you do not need them.

6 Ride a bike or walk, and do not often drive your car.

Answers：2 √    3 √    5 √    6 √

2. Listen again and complete the table.

（1）Ask students to read the table and try to complete it from memory.

（2）Tell students to compare their answers with a partner, and then play the recording again for them to check their answers.

（3）Play the conversation a final time, if necessary.

Step 8  Around the world

（1）Ask students to look at the photo and the title of the passage and guess what Earth Hour is.

（2）Tell students to read the passage very quickly to see if their ideas are correct.

（3）Read the passage as a class.

be held

switch off

awareness of climate change

more and more

take part in

Step 9  Module task: discussing what you can do about pollution

1. Work in pairs. Decide what kind of pollution you want to talk about.

Choose a subject that you care about the most. It could be water pollution, air pollution, etc.

Find out more information about your subject. Look it up on a website or in a book.

（1）Put students in small groups and ask them to list different kinds of pollution.

（2）Ask students to decide upon the kind of pollution their group would like to talk about.

（3）Give students time to research the topic.

2. Discuss your subject.

（1）Tell each group to nominate a secretary who will listen to their discussion and take notes.

（2）Tell students to follow the instructions and discuss their topic.

（3）When the discussion is finished, the group secretary reads the notes to the group, who decide if it is a reliable summary.

（4）The group then uses the secretary’s notes to prepare a short presentation on the type of pollution they have chosen.

3. Present some groups’ ideas to the whole class.

Step 10  Homework

Review the words, expressions and grammar in this module.

当堂达标

Ⅰ. 用所给单词的适当形式填空。

1. Though ________（pollute）is heavy now, I don’t think it’s ________（hope）.

2. If the rivers are polluted, ________ （farm）can’t use the water for their crops.

3. If _________（everyone）starts to do _________（something）, the world will be saved.

4. We all need a _______（health）environment, but we produce _______ （waste）every day, and it is _______（harm）to our environment.

5. Do not _______（waste）things.

6. Before you buy _________（something）new, think whether it is _______    （real）necessary because maybe the old one is just as good!

7. Let’s take these simple steps today so that we will save the world for our __________（grandson）and ________（granddaughter）tomorrow.

Ⅱ. 完成下列同义句。

1. It’s not polite to speak to others with your mouth full of food.

It’s _________ to speak to others with your mouth full of food.

2. The teacher asked him to write the composition again.

The teacher asked him to _________ the composition.

3. He’s not popular with some of the neighbors.

He’s _________ with some of the neighbors.

4. I hate sweet food. Especially, I don’t like eating cake.

I hate sweet food. Especially, I _________ eating cake.

5. Hamburgers, candy and ice cream aren’t healthy food.

Hamburgers, candy and ice cream are __________ food.

Ⅲ. 单项填空。

1. We should use china cups because we can ________ them.

  A. reduce   B. repeat   C. reuse    D. replace

2. Listening to light music is one of _________ ways to relax yourself when you feel tired.

  A. the more helpful     B. more helpful

  C. the most helpful     D. the helpful

3. It is sunny outside. Why not _________the light and open the window?

  A. put off             B. put away

  C. turn up             D. switch off

4. I don’t know if Eric _________ this Sunday. If he _________ here, I’ll call you at once.

  A. will come; will come    B. comes; comes

  C. comes; will come    D. will come; comes

5. He tries his best ________ his homework, though he is quite poor in it.

  A. finishing      B. to finish

C. finishes       D. to finishing

答案：

Ⅰ. 1. pollution    hopeless     2. farmers    3. everyone  something

4. healthy  waste  harmful    5. waste    6. something   really

7. grandsons  granddaughters

Ⅱ. 1. impolite    2. rewrite    3. unpopular    4. dislike    5. unhealthy

Ⅲ. 1. C   2. C   3. D   4. D   5. B

板书设计

教学反思

教学反思