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Unit 4 Natural disasters习题
一. 同义替换
1. Which of the following has the same meaning of the word “alive” 21·cn·jy·com
A. living B. active C. interesting D. lucky
2.The village will be flooded when it rains heavily.www-2-1-cnjy-com
A. full of snow B. full of water
C. fill with snow D. fill with water
3.The old man said nothing , just staring at the letter.2-1-c-n-j-y
A. thinking of . ( http: / / www.21cnjy.com ).. for a long time B. smiling at ... for a short time 21*cnjy*com
C. looking at ... for a long time D. laughing at…for a long time【出处：21教育名师】
4. When he heard the good news, he jumped immediately.21*cnjy*com
A. quickly B. at last
C. at once D. after a while
5. She looked up in surprise when she heard the strange noise.2·1·c·n·j·y
A. amusement B. happiness
C. particular D. amazement
6.His son didn’t listen to him. His advice fell on deaf ears.
A. was accepted B. was paid no attention
C. was put into action D. fell into the ears
7. If you decide to do something, you should stick with it.【来源：21cnj*y.co*m】
A. go on with B. study for
C. pay attention to D. talk with
8. Our boss is always strict with us.
A. leader of a family B. leader of a company【版权所有：21教育】
C. leader of a country D. leader of a class
9.The teachers let him help you with your English.21cnjy.com
A. allow B. have C. make D. ask
10.He suggested going there by plane.
A. insisted B. enjoyed C. advised D. agreed
11. He is able to finish the work on time.
A. has to B. can C. may D. must
12. If people or othe ( http: / / www.21cnjy.com )r creatures are still living and not dead, they are not dead.
A. good B. useful
C. alive D. bad
13. A coach is something for carrying passengers over long distances.
A. train. B. a comfortable bus.
C. truck D. a suitable car
14. I'm too busy. I don't have time to go out with you.
A. don’t need B. don't like
C. have no time D. have much time
15. We expect to see the famous singer.
A. hope B. wait C. want D. like
二. 单项选择
1. The girl stared _____ the stranger but said nothing.21教育名师原创作品
A. in B. at C. for D. with
2. In class students should pay attention to ________ to the teacher.
A. listening B. listen C. hearing D. hear
3. I cannot afford _______around and worry about the flood.
A. sit B. sitting C. to sit D. sat
4. ______is important for us _______ know about natural disasters.
A. It, by B. It, to C. This, of D. This, in
5. The boy becomes interested _______ playing football.21教育网
A. by B. on C. at D. in
6. When hearing the news, he opened his eyes wide ______ surprise.
A. on B. in C. on D. at
7. __________ is it from your home to school
A. How long B. How soon C. How far D. How often【来源：21·世纪·教育·网】
8.Be careful! The tree is ___________.
A. falling off B. cutting down C. falling down D. cutting off
9. Class 4 won the game __________.
A. in the end B. at the end C. on the end D. by the end
10. Look! A lot of people are waiting ______ the bus.
A. in B. ∕ C. for D. on
11. To_______ something means to see or hear somebody or something.
A listen B notice C. catch D. understand
12. The snow is ______ thick ________buses are unable to run on it.www.21-cn-jy.com
A. too……to B. suc ( http: / / www.21cnjy.com )h ………that C. enough ……..to D. so ……that
13. The bike ( http: / / www.21cnjy.com ) was _____ damaged in the accident, and it cannot be repaired.
A. heavily B. lightly C. hardly D. badly
14. I ______ at four this morning in order to catch the train.
A. got up B. woke up C. stayed up D. went up
15. The police are looking for the_______ child everywhere.
A. missing B. lose D. losing D. miss
三、词汇、短语练习。
1. The old man is d_________. He can’t hear anything.
2. My dog is m____________. Can you help me find it
3.I didn’t n___________ him enter the room.
4. All of them are s ___________at the computer screen.
5. The road was so narrow（狭窄）that cars were unable to p _________by。
6. This was the wor ( http: / / www.21cnjy.com )st ___________(nature) disaster in the history of the United States.
7. Look! There are two _________(coach) in front of our school.21·世纪*教育网
8. The boy always dreams about _____________(fly) to the moon.
9. I have no time ____________(think) about these questions.
10. Mary suggested ____________(go) there by bus and I agreed.
11.When I came in ( http: / / www.21cnjy.com )to my room, I found a little cat ____________(躺) under the bed.
12.It ___________(花费) me five hours to finish my homework yesterday.
13.We all __________(期望) him to see us soon.
14.When an earthq ( http: / / www.21cnjy.com )uake happens, you’d better ___________(保持)calm and take cover if indoors.
15.I can’t ____________(负担得起) to buy such a big house.
答案：
1、 同义词替换
1.A alive的意思和living一样，“活着的”
2.B flood 淹没，也就是full of water 满是水。
3.C stare 注视 C项符合。
4. C immediately ，at once立刻，马上
5. D surprise 惊讶，吃惊，和amazement 的意思相同
6. B fall on deaf ears不被注意 D项适合。
7.A stick with 继续，相当于go on with
8. B boss 老板即leader of a company 公司的领导
9. B let 让，使 相当于have
10. C suggest 和advise 都是“建议”
11.B be able to “能够” 相当于can
12.C not dead=alive 活着的
13.B coach 即bus
14.C don’t have time 和have no time “没有时间’
15.A expect 和hope同义 “希望”
二、单项选择
1.B stare at “注视”
2.A pay attention to “注意” to是介词 后加doing ，listening to “听…….”
3.C afford to do sth
4.B it是形式主语，真正的主语是后面的动词不定式
5.D be/become interested in
6.B in surprise
7.C how far “多远“提问距离
8.C fall down “倒下”
9.A in the end最后
10.C wait for 等着……
11.B notice “注意到”
12.D so ……that 因为thick 是形容词，所以用so
13.D badly 很，非常
14.A get up 起床
15.A missing 不见了
三、词汇、短语练习
1. deaf 2.missing 3.notice 4. staring 5. pass
6.natural 7.coaches 8.flying 9.to think 10.going21世纪教育网版权所有
11.lying 12.took 13.expect 14.keep 15.afford
21世纪教育网 www.21cnjy.com 精品试卷·第 2 页 （共 2 页）
21世纪教育网 www.21cnjy.com第 3 页 （共 3 页） 版权所有@21世纪教育网(共73张PPT)
Unit 4 Natural disasters
第一课时
Reading
Warm-up
Lead-in
flood
forest fire
earthquake
typhoons
Guessing game
natural disasters
Lead-in
snowstorm
rainstorm
volcanic eruptions
tsunamis
thunder and lightning
landslides
droughts
Do you know other natural disasters
drought
Presentation
A. What do you know about …
Write the name of the natural disaster under each picture.
A1
typhoon
earthquake
flood
forest fire
Presentation
In pairs, discuss the following questions.
A2
What other natural disasters can you think of
What should people do when there is a natural disaster
Discussion
Presentation
Look at the pictures, the title and the first paragraph of the story on page 51. Then circle the best answers.
What is the first word that you can think of to describe the story
a Dream. b Water. c City.
2. Why did Kevin have this dream
a Because he is interested in the North and South
Poles.
b Because he is worried about the environment.
c Because he likes Geography.
B
B Before you read
Presentation
dead
stick with
deaf
notice
awoke
Find words from the article on page 51 that have similar meanings to the words in italics below.
C1
Vocabulary
Presentation
badly
objects
fell on deaf ears
sat around
had no time to
alive
Kevin is talking about the weather with his sister plete their conversation with the words from the box. Change their forms if necessary.
C2
Presentation
Read the story on page 51 and complete the scenes below.
D1
D Comprehension
roads parks
small houses
stick with it
sit around and worry about the flood
Presentation
think about the flood
playing computer games
people’s rooms
their desks
their computers
Discussion
What is the moral of Kevin’s story Discuss this with your classmates.
D2
故事的寓意是指我们从阅读文本中获得的或者作者希望告诉我们的道理，它反映了作者的写作目的以及作者对一件事的立场、看法和主张。
我们通常可通过分析关键情节或人物语言来归纳故事的寓意。
People should care more about the environment, because computers and other high-tech machines do not have all the answers to our problems.
Task 1: Read and divide the text into three part.
Paragraph(s)
Part 1: Before the dream
Part 2: During the dream
Part 3: After the dream
Practice
1-3
4-9
10
Presentation
Presentation
Task 2: Read the first part of the text and answer the questions.
Why did Kevin dream about a great flood
What worried him a lot
Because he learnt in Geography class that if all the ice in the North and South Poles melted, sea level around the world would rise, and many cities would be flooded and disappear.
What would happen if their city was badly flooded Would anyone remain alive
Task 3: Read the second part and put the sentences in the correct order.
( ) Very soon, the water came into people’s rooms.
( ) Kevin tried to call his dad, but the line was dead.
( ) His bedroom floor was a pool of water at nine o’clock in the morning.
( ) Kevin emailed his best friend, but he was busy playing computer games.
( ) Kevin sent an email to his dad, but he told Kevin that he had to stick with his work.
( ) In surprise, people finally started to notice the flood, but it was too late.
( ) Kevin shouted, “The WATER! Look at the WATER!” But his cries fell on deaf ears.
1
2
3
4
5
6
7
Presentation
Discussion
Which films does Kevin’s story remind you of
Could a flood like the one in Kevin’s dream really take place one day
What can we do to prevent natural disasters such as floods from taking place
Discussion
Homework
Try to retell the reading themselves.
Grasp useful words , phrases and sentence patterns.
Read the Culture corner and do self-assessment.
4. Review the Vocabulary and Comprehension.
5. Team work.
Discuss how to survive a disaster.
第二课时
Listening & Speaking
Lead-in
Pre-listening
listening
Before you listen, you should know the word:
survival kit
救生包 (装有食物、医疗用品和工具)
An asteroid is coming
Presentation
Listen to two government announcements and a conversation. Then tick ( ) the thing each student is going to do when the asteroid hits the Earth.
A
Presentation
Listen to the recording again and decide whether the following sentences are T (True) or F (False).
B
Presentation
Team racing
Activity
五人一组，在听的过程中记录关键信息，然后结合自己的笔记和教材中的练习，分角色表演这段情景对话。
Ready
Presentation
Speaking
Anger
Sadness
Fear
Joy
Guess the following feelings.
Presentation
Speaking
Boring
Surprise
Bravery
Worried
Presentation
We have different feelings in different situations. Some things make us happy, while others make us angry or afraid.
Do you know how to express your different feelings
Presentation
Speaking
Presentation
Surprise
Have I really won the competition
I can’t believe you can run so fast.
Bravery
Don’t be afraid. I won’t let these dogs bit you.
I’m strong enough to fight the bad man.
Do you know how to express other feelings
Presentation
Boredom
I’ve studied for three hours already. I wish I could watch some TV.
What a boring day! I don’t know what to do now.
Presentation
Team racing
Activity
In pairs, make short conversations. Use the expressions above and the example below to help you.
Ready
Presentation
If an earthquake happened, what should we do
Think and choose
Presentation
Speak up
Presentation
Speak up
Work in groups of four. Decide on an emergency situation. Follow the example.
B1
Presentation
Read the conversation in B2 and answer the questions.
How does Judy feel
What does Peter suggest doing
Why doesn’t John think it is a good idea to hide under the desks
Who is brave among the four students
What does Amy think people should do when an earthquake takes place
She feels very afraid.
He suggests hiding under the desks.
Because the desks are not strong enough.
Peter.
She thinks people should stay where they are and wait for the earthquake to stop.
Presentation
Read and try to recite the conversations in 5-10 minutes.
Presentation
Role-play
1. Role play the conversation in groups;
2. Role play the conversation in front of the class.
Let’s see which group does the best.
Presentation
Team racing
Activity
四人一组，选定一种紧急情况，共同设计、编制一段对话。排练结束后请到讲台上表演对话，然后全班同学投票选出最佳的表演小组。
Ready
Presentation
For example:
Setting: Kelly, a teenager, is at home with three
of her friends. They are playing computer
games. Kelly’s parents are at work.
Situation: Suddenly, the computer stops working
and the electricity goes off. A super
typhoon has hit the city.
Characters: Four teenagers — Kelly, Harry,
Hannah and Jo.
Different feelings of characters:
Kelly is worried. Hannah is afraid.
Harry and Jo are brave. The teenagers
are talking about what they should do.
Homework
Practice the listening again .
Make a dialogue about what we can do when facing a disaster and discuss it with your partner.
Team work.
Each team should prepare a short play about how to survive a disaster.
Act the play out.
第三课时
Grammar
-----it的用法
Lead-in
It’s ___________ in the morning. My bedroom floor is a pool of water.
___ is one o’clock.
It is ________now.
It ______ all day.
___ is only ________________ from my home to the school.
___ is ___ in this room.
nine o’clock
It
summer
rained
a five-minute walk
It hot
It
go
Ready
Practice
Presentation
Grammar
在表示时间、季节、天气、温度或距离的表达方式里，我们用 it 作形式主语。此时，it无实际意义但不可以省略。如：
It is half past twelve.
It is spring.
It is fine today.
It is twenty-five degrees centigrade.
It is two kilometres to the post office.
it 的用法 I
Presentation
Answer the questions using it as the subject.
A
It is sunny.
It is five o’clock.
It is 27 June.
It is summer.
It is three kilometres.
Presentation
Put the words in the correct order to make meaningful sentences.
B
It is time for supper now.
It is autumn in Australia now.
It is about five kilometres to the park.
It was windy yesterday.
Presentation
My boss has given me some work. ____ important __________ it.
__ took a long time _______ the house.
3. ___ is wrong _____ no attention to Kevin.
4. ___ is not a good idea ___________ and ____________ the flood.
5. It _______ that nowhere was too far for Zheng He to visit.
6. ___________________ nobody is paying any attention to the flood.
It’s
to stick with
It
to build
It
to pay
It
to sit around
worry about
seemed
It seems/appears that
Ready
Presentation
当句子的主语是动词不定式短语时，动词不定式短语一般不放在句首，而通常用it来作为句子的开头，动词不定式短语则放在句末。如：
It is pleasant to sit in the Sun.
It was a pleasure to sit in the Sun.
it 的用法 II
Presentation
注意：
“It + is + 形容词 + for + 宾语 + to do sth.” 句型通常与表示可能性、必要性、重要性、紧迫性、频繁程度以及价值判断等的形容词连用。如：
It is impossible for me to finish the writing in half an hour.
It is strange for her to be late for school.
Presentation
It 作为形式主语还常见于It seems / appears that… 的句型中。如：
It seems/appears that his mother knows the truth.
具有最高“信息价值”的较长、较复杂的结构通常位于句末，因此，我们常使用带 “形式主语it”的结构，而将充当主语的从句或动词不定式移到句末。
Presentation
Write a sentence using it and a to-infinitive under each picture below.
C
It is important to stay calm when there is a fire.
It is dangerous to start a fire in the forest.
Presentation
It is a good idea to take an umbrella.
It is nice to have a picnic in the park.
Presentation
Put the words in brackets in the correct order to complete the conversations.
D
It seems that a typhoon is coming.
It appears that the flight has been cancelled.
It seems that something bad has
happened to her.
Presentation
Make a conversation about the emergency. The characters should express different feelings, e.g. bravery, fear and worry. Follow the example.
B2
Practice
To have a good knowledge of history is very helpful for all of us.
To learn a foreign language is very useful for a scientist.
3. To finish this work in three hours is necessary.
It is very helpful for all of us to have a good knowledge.
It is necessary to finish this work in three hours.
It is very useful for a scientist to learn a foreign language.
I. 用it作形式主语改写句子。
Practice
现在十点半了。
2. 好像他又犯了同样的错误。
3. 在那个城市夏天炎热冬天寒冷。
4. 很容易理解他为什么没回来。
It is ten thirty now.
II. 翻译下列句子。
It appears that he has made the same mistake again.
It is hot in summer and cold in winter in that city.
It is easy to understand why he has not come back.
Homework
Grasp the grammar.
Do the practice in this unit again.
Make some sentences with “it”.
Team work.
Make a conversation about the emergency.
第四课时
Writing
Lead-in
Have you ever heard of an ice storm
Read the passage quickly and answer the following questions.
1.Why was the storm in 1998 unusual in Canada
2.What problems did the ice storm cause
3.Did the trouble end when the storm stopped Why or why not
Discussion
1.What was the natural disaster like
2.What did people experience during the disaster
Presentation
Writing
Read the short report below about a typhoon. Then discuss with your classmates what you can do to help the homeless.
A
Presentation
Answer the questions according to the report.
What happened to Garden City last weekend
How many people were killed because of the typhoon
How many people lost their homes in the typhoon
What do you think of the typhoon
A typhoon hit it.
Three.
About 2,000.
Dangerous. / Terrible. …
Presentation
Write a notice asking students to help the people who have been made homeless after the typhoon. Use the words below to help you.
B
Presentation
【写作指导】
When you need to write a notice, you should try to:
get the readers’ attention
give all the information as clearly
and briefly as possible;
ask the readers to do something
(e.g. take part in an activity)
Presentation
Three people were killed and one person is missing. The typhoon has made about 2,000 people homeless.
do not have enough food. They
have nowhere to live.
raising money and organizing volunteers to go there. It is important to do these things as soon as possible.
Presentation
Presentation
中考作文
在过去几年中，我们已经目睹了人类活动引起的各种灾害。作为一位大学生，请写一封倡议书，呼吁大家关注这些自然灾害并保护环境，内容应包括：
1)举出人类活动引发的灾害的实例
2)指出一些必要的防范措施
3)号召大家行动起来拯救地球
Presentation
【思路点拨】
本题要求写一封倡议书。根据所给提纲，本文应包含以下内容：点明写信的目的：呼吁大家关注人类活动对地球造成的危害，陈述灾害的具体表现;为了拯救地球，我们应当采取哪些措施;号召大家行动起来拯救地球。
Presentation
Dear friends,
I am writing this letter to call on everyone to pay attention to the natural disasters caused by human activities. Floods ,droughts and dust storms have increased these years . That’s mainly because people are destroying the environment.
Presentation
It’s time to stop this. First planting trees and grass is very important, especially in the arid areas. Besides, other ways, like saving water and using recycled paper, can be helpful.
Presentation
So let’s take action at once . Your efforts even small ,are meaningful to the earth. If you are willing to do something to save our planet, please start from the little things right around you. Thank you!
Sincerely yours,
Li Ming
Presentation
1. 用到了高级语法： caused by human activities 是过去分词作定语； because people are destroying the environment是表语从句； If you are willing to do something to save our planet是条件状语从句。
亮点赏析
Presentation
2. 用到了很多短语如：pay attention to；take action；be willing to等和It’s time 句式。同时层次分明，用到first，besides 等使过渡自然 。
Discussion
Group work.
Choose one from the four natural disasters to discuss in groups.
a flood
a forest fire
a typhoon
an earthquake
Homework
Finish the writing exercises in
Learning English.
2. To preview More practice on page 61
3. Write something about how to survive an earthquake .
4. Review Unit4.登陆21世纪教育 助您教考全无忧
Unit 4 Natural disasters教案
课题: Unit 4 Natural disasters
课时: 第 1 课时，共 4 课时
课型:Reading
教学目标：
知识目标
1. Students can get the main idea of the text.
2. Students can learn ( http: / / www.21cnjy.com )about the general idea and main content of the text.
3. Students can grasp useful words and phrases.
能力目标
To improve the ability of skimming and scanning.
To finish the practice themselves.
To use sentence patterns to describe different situations. 21·世纪*教育网
情感目标
To learn to protect the environment to decrease natural disasters. 21*cnjy*com
To protect the env ( http: / / www.21cnjy.com )ironment themselves and help them understand the importance of how to survive a natural disaster. 【出处：21教育名师】
教学重点: Get the main idea of the text.
教学难点: Learn about the general idea and main content of the text21*cnjy*com
教学步骤:
Step 1.Lead-in.
1. Show a picture(通过图片展示，以提问的方式展开).
T: Ask: Look at the pictures and let’s see what they are doing.
Ss: ……..
T: Why is he packing his disaster survival kit
Ss: ……..
T: (Make a summary)
Natural disasters a ( http: / / www.21cnjy.com )re increasing these years, like floods, earthquakes . It’s important for us to know how to survive these disasters.(已发生的实例，如512大地震等，以强调效果)
2.A guessing game.
To see how many kinds of natural disasters the Ss know.(边展示课件，边提问)
Step 2 Presentation
Reading
Part A( A1).
T：Read to get the ma ( http: / / www.21cnjy.com )in idea by skimming ，scanning and task-reading. （展示课件，提醒学生是速读）
T: Ask：What do you know about … .(展示课件，边问边答)
Ss：Typhoon, earthquake……….
A2 Discussion
What other natural disasters can you think of
What should people do when there is a natural disaster
(分组进行，最后每组总结发言)
Part B
T: Look at the pi ( http: / / www.21cnjy.com )ctures, the title and the first paragraph of the story on page 51. Then circle the best answers. .
(练习学生的判断力和把握细节的能力)
Part C Vocabulary
T：Let’s revise voc ( http: / / www.21cnjy.com )abulary and try to finish the practice.（展示课件并通过实例讲解解题技巧，边提示边练习）
Part4 Comprehension
T: Ask: Read the story on page 51 and complete the scenes below.
(按照场景，边提示边练习)
T：What is the moral ( http: / / www.21cnjy.com ) of Kevin’s story Discuss this with your classmates.（展示课件，讲解练习）
Part5. Practice in class
Task1,2,3.（展示课件，检查学生对知识的掌握情况）
Step3.Discussion
Discuss the qu ( http: / / www.21cnjy.com )estions below in groups and then report your result to the whole class. Let’s see which group is the best! (让学生问题为话题，展开讨论。让学生们自己组织语言总结发言，老师最后总结。)
Step4 Homework
1. Try to retell the reading themselves.
2. Grasp useful words, phrases and sentence patterns.www.21-cn-jy.com
3. Read the Culture corner and do self-assessment.
4. Review the Vocabulary and Comprehension.
5. Team work.
Discuss how to survive a disaster.
课题: Unit 4 Natural disasters
课时: 第 2 课时，共 4 课时
课型:Listening &Speaking
教学目标:
知识目标
1. To finish the listening exercises by taking down the key words.【版权所有：21教育】
2. Master the useful expressions.
3. Be able to talk about some common natural disasters.
能力目标
To improve the ability of listening and speaking.
To learn the ( http: / / www.21cnjy.com )expressions of different feelings in different situations...
To grasp listening skills and speaking skills.
情感目标
To protect oneself against a natural disaster.
To use their own word ( http: / / www.21cnjy.com )s to tell people the importance of protecting our environment in order to decrease natural disasters . 2·1·c·n·j·y
教学重点: Be able to get the main content of the listening material.
教学难点: How to listen and get information .
Speak o ( http: / / www.21cnjy.com )ut in English their ideas about surviving a disaster.
教学步骤:
Step1.Pre-listening
Explain what a survival kit is used for.
（通过对survival kit的讲解，导入听力）
Step2. Presentation
1. Listening
Say ：Listen to two gov ( http: / / www.21cnjy.com )ernment announcements and a conversation. Then finish the following tasks. （听之前提醒学生的注意点）21·cn·jy·com
Play the recor ( http: / / www.21cnjy.com )ding and lead students to finish the listening exercises by taking down some key words.（第二遍听时，要求学生跟读）
2. Activity
Team racing.（通过比赛，调动学生学习积极性）
3. Speaking
(1)Have a guess game. （展示课件，边问边答）
(2)Free talk. Ask: Do you know how to express other feelings
Encourage the Ss to express themselves freely.
（根据前面积累的一些句子，用自己的话表达出来，听说结合练习）
(3)Activity &Practice
Team work &speaking practice.（综合练习，检验听说效果）
(4) Speak up &Team racing &Role play
Encourage students to make a dialogue.
（运用Role-play和让学生表演，锻炼学生的综合能力，并选出最佳组合）
Step 4. Homework
1. Practice the listening again .
2. Make a dialogue ( http: / / www.21cnjy.com )about what we can do when facing a disaster and discuss it with your partner.【来源：21cnj*y.co*m】
3. Team work.
Each team should ( http: / / www.21cnjy.com )prepare a short play about how to survive a disaster.
Act the play out.
课题: Unit 4 Natural disasters
课时: 第 3 课时，共 4 课时
课型: Grammar
教学目标:
知识目标
1.Master the usage of “it”.
2.Master the usage of it used as empty subject.
3.Use it to make sentences.
能力目标
To improve the ability of using the grammar to make sentences.21cnjy.com
To grasp the grammar.
情感目标
To use it in different situations.
教学重点: Work out the rules of “it”
教学难点: The rules of “it”
教学步骤:
Step1: Lead-in
Enable students to do a guessing game.
(Show practice to ask the Ss to finish. 展示练习，让学生了解it的基本用法)。
Step2: Presentation
1.it的用法（1）:在表示时间、季节、天气、温度或距离的表达方式里，我们用 it 作形式主语。此时，it无实际意义但不可以省略。
1）. Help students to work out the rule.（用实例引导）
2）. Show the practice and ask students to do it.（巩固练习）21教育名师原创作品
2. it的用法（2）:当句子的主语是 ( http: / / www.21cnjy.com )动词不定式短语时，动词不定式短语一般不放在句首，而通常用it来作为句子的开头，动词不定式短语则放在句末。
注意：
1）“It + is + 形容词 ( http: / / www.21cnjy.com )+ for + 宾语 + to do sth.” 句型通常与表示可能性、必要性、重要性、紧迫性、频繁程度以及价值判断等的形容词连用。
2）It 作为形式主语还常见于It seems / appears that… 的句型中。
Further practice.
Work in pairs.
Explain the task to students and check the students’ achievement.
Which group is the best
Encourage students to show their work.（通过用it组织句子同时结合说，写的练习锻炼学生的能力）
Step3. Practice in class
it的用法综合练习。
Step4: Homework
1. Grasp the grammar.
2. Do the practice in this unit again.
3. Make some sentences with “it”.
4. Team work.
Make a conversation about the emergency.
课题: Unit 4 Natural disasters
课时: 第 4 课时，共 4 课时
课型: Writing
教学目标:
知识目标
To grasp how to write a short article.
Master the skills of writing a notice.
能力目标
To develop the ability of writing.
To improve writing skills.
情感目标
Through writing ( http: / / www.21cnjy.com )to have a better understanding of the importance of knowledge of survival .
教学重点: The skills of writing a notice.
教学难点: Cultivate the concept of protection against disasters.21教育网
教学步骤:
Step1: Lead in
1.Use the More practice part to check the Ss ability of fast reading.www-2-1-cnjy-com
T: How much do you know an ice storm Read the passage and tell me.
Help students think about the questions.
2. Discussion
In pairs discuss the questions.(讨论总结，以书面的形式总结报告)
Step2: Presentation
1.T：Say：Read the sh ( http: / / www.21cnjy.com )ort report below about a typhoon. Then discuss with your classmates what you can do to help the homeless. .2-1-c-n-j-y
（1）.Ask the students to finish the questions.
（2）.Guide students to learn to write a notice.
(通过给出的要点，帮助学生组织句子，通顺全文)
2.Explanation.
（1）Explain main points about writing a notice.
（2）Brainstorming.
Elements of a notice.(通过学生之间的讨论，总结出a notice的要点)
3. Example（有关自然灾害的中考作文）
（边展示课件，边讲解，进行亮点赏析，提示学生注意点）
Step3.Discussion
Group work.
Choose one from the four natural disasters to discuss in groups.【来源：21·世纪·教育·网】
Which group is the best （通过团队合作，取长补短，加深印象）
Step 4: Homework
1.Finish the writing exercises in
Learning English.
2. To preview More practice on page 61
3. Write something about how to survive an earthquake .21世纪教育网版权所有
4. Review Unit4.
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