课件22张PPT。IntroductionSandstorms in AsiaModule 4 Teaching important points
1. How to describe sandstorms and environmental protection
2. How to express one’s opinions
Teaching difficult points
Learn to look for the general idea and specific information.SandstormSandstormSandstormSandstormSandstormSandstormSandstormSandstormSandstormSandstormSandstormSandstormThe walls are almost
buried by sand. Activity1 Look at the picture below.
Complete the sentences using the correct form
of these words. blow bury frightening
last (v) sandstorm There has been a . It for
ten hours and was very . The wind
the sand high around the houses, and some cars were almost completely by the sand. sandstormhas lastedfrighteningwas blowingburied1. Sandstorms begin in desert areas.Deserts are created by climate
changes. Activity2.
Now work in pairs. Discuss the following
statements and decide which statement
is false.Deserts are also created because people cut down trees and dig up grass.( × )Sandstorms from Asia have blown
across the Pacific Ocean to American.Sandstorms can’t be prevented.The inland region has more sandstorms than the one near the sea. Activity3
Work in pairs. Discuss these questions.
Then report your answers to the class.1. What should you do in a sandstorm to protect yourself?2. Which do you think is more dangerous,
an earthquake or a sandstorm?
Say why.3. Where in China do sandstorms begin?4. If you are in a desert, what is the first sign of a sandstorm?5. Have you ever been in a sandstorm?
If yes, describe it to your partner.major sandstorm centers in ChinaGansu and Western Inner MongoliaBeijing and Northeast Inner MongoliaPreview the passage on P32 of the textbook.Homework课件25张PPT。Sandstorms in AsiaModule 4Reading and vocabularyLearning ability goals
Help students to learn how to describe a phenomenon and express the feeling.
Teaching important points
1, Learn some characters and result of the sandstorm.
2, Ask students to think ways to protect the environment.
Teaching difficult points
1, Discuss the answers to the questions.
2, Generalize the characteristics of sandstorm.cycling in a sandstormActivity1 Look at these photos and answer these questions.
What is happening?
What is the cyclist wearing and why?
There is a sandstorm blowing.They are wearing hoods, masks and
Glasses to protect themselves.What do you think happens to traffic in this situation? Why?
What do you think experts advise people to do in this situation?It moves very slowly. Because it is not
clear to Everything on the road and
people must take care.Stay at home.Activity 2 Match the words with
the definitions 1.To ride a bicycle2.Some one who knows a lot about a particular subject cycleexpertcitizen cycle dust expert forecast process situation survive3. Things that happen one after other,
and have a result。4. Some one who lives in a particular town or country。citizen5. Very small bits of dirt or earth on the ground or in the air。dustprocesscitizen cycle dust expert
forecast process situation survive7. To say what will probably happen8. Everything that is happening at a particular time
forecastsituation6. To continue to live after a dangerous
situation or eventsurvivecitizen cycle dust expert
forecast process situation surviveActivity3.
Find these words in the passage
Choose the correct answer.1. (b) sand hills
2. (b) to cause a change
3. (a) face
4. (a) strongActivity4. Read Sandstorms in Asia again.
Complete these sentences of P33 in the textbook.1…prevent you from seeing the sun.
2…he explained a terrible sandstorm.
3…because of a desertification.
4…cause deserts and sandstorms to increase.
5…the drivers can’t see.
6…prevent the desert coming nearer.Activity5.
Complete these sentences using words
from the text. Keys:1 forecast
2 frightening
3survived4 dust
5 process
6 cyclist/ citizens1.prevent
【课文原句】To prevent it coming nearer,
the government is planting trees.
【点拨】prevent … (from) doing … 此处意
为“阻止……做……”，from可以省略。整
句话意为“为了阻止沙漠的逼近，政府已
经开始植树”。如：
Nobody can prevent us marching forward.Language points【拓展】类似的还有stop / keep …
(from) doing …。在keep … from doing …中， from不能省去。因为keep … doing …意为“让……一直做……”。如：
The loud noise outside kept / prevented / stopped me from sleeping.
The teacher kept me writing these words one hundred times. 2.mass
【课文原句】
Scientists have tried many ways to solve
This problem and in China, a mass
Campaign has been started to help
solve it. 【点拨】mass 在此意为“大规模的”。另外，mass 还有“大量、大批”的意思，可构成 a mass of 或masses of，既可修饰可数名词，又可修饰不可数名词。整句意为“在中国，科学家们尝试用多种方法去解决这一问题，一场大规模治理沙尘暴的活动已经开始来帮助解决这一问题”。如：
Before the rain, the sky had a mass of clouds.
Masses of snow and rock broke away and fell on the climbers. 3.survive
【课文原句】You just had to hope you’d
survive.
survive 此处意为“幸存，生还”，为不及物
动词, 后可跟介词from或者on。整句意为“
你只能希望自己能够幸免”。如：
Of all the people in the plane that crashed,
only six survived.
Many old rules have survived from times.
【拓展】 survive当及物动词讲时，意为
“经历（某事）而幸存”。如：
Few buildings survived the sudden big earthquake.
This plant may not survive the frost. 4.cutdown, dig up 【课文原句】 This is a process
that happens when land becomes desert because of climate changes and because people cut down trees and dig up trees.
【点拨1】cut down此处意为“砍倒”。如：
They cut down many old trees and planted some young trees.【拓展】 cut down还有“消减；删减”
的意思。如：
Your article is too long, so please cut it
down to 500 words.
【点拨2】dig up此处意为“从地里挖出
（某物）”。如：
We dug up the tree by its roots.
【拓展】 dig up 还有“掘到，掘出”
的意思。 如：
An old vase was dug up here last month.1.for centuries 多个世纪以来
2.solve the problem解决问题
3.get caught in 被困住
4.cut down砍倒；削减
5.wake up to 警觉到；意识到
6.make it adj/noun to do /clause
7.advise sb not to do sth 建议某人不要做某事
8.prevent sb from doing sth阻止某人做某事Important phrasesWriting :目前，沙尘暴多次肆虐我国，请根据本课所学知识，写一篇关于植树造林，保护环境的文章。HOMEWORK课件27张PPT。Sandstorms in AsiaGrammar1Module 4定义练习构成 用法 动词不定式是非谓语动词的一种，它没有人称和数的变化，在句子中不能独立作谓语，但它仍保持动词的特点，既可以有自己的宾语和状语。 动词不定式 的构成：to+动词原形 Infinitive 动词不定式具有名词、形词
副词的特征。因此在句中可以
主语、表语、宾语、补足语语
状语。动词不定式的用法1.作主语(1)把不定式置于句首
e.g.To say is one thing;to do is another. (2)用it作形式主语，把真正的主语不定式
置于句后 It’s important to do it right away.动词不定式作主语时句子有以下两种:常用句式有： ① It＋be＋名词＋to do
It‘s our duty to take good care of the old.
??? ② It takes sb+some time+to do
How long did it take you to finish the
work? ?③It＋be＋形容词＋for sb＋to do
?? It is difficult for us to finish writing the composition in a quarter of an hour.
④It seems＋形容词＋to do
??? It seemed impossible to save money常用句式有：2.作表语：e.g.
What you should is to leave here at once. The problem is how to do it. e.g. I want to buy something for him . I don’t know what to do next.3.作宾语：后面能接不定式作宾语的动词有：
agree, ask, choose, decide, forget, hope,
learn, want, wish, would like等。如：动词不定式作宾语的注意事项:1．有些动词既可跟不定式作宾语，也可跟动名词作宾语，但含义不同：
remember to do 记住要做某事；remember doing 记得曾经做过某事
forget to do忘记要做某事
forget doing 忘记曾经做过某事 stop to do 停下来去做某事
stop doing 停止做某事
go on to do 继续做另一件事
go on doing 继续做原来在做的事
I remember seeing you somewhere before.
我记得以前在哪儿见过你。
Please remember to turn off the light when
you leave. 离开时请记得关好灯。动词不定式作宾语的注意事项:2．不定式作宾语时，如带有宾语补足语，则要把不定式放到后面，用it作形式宾语，构成“主语+动词+it+宾补（形容词、名词）+不定式”结构。如：
He found it very difficult to get to sleep.
他发现很难入睡。动词不定式作宾语的注意事项:4 补足语：e.g.He asked me to wait for him for a while. My father lets me go out alone at night. (1) 宾语补足语：注意：
A.后面能接to不定式作宾语补足语的动词有：
ask, order, teach, tell, want, wish, help等。 B.使役动词let, have, make及感官动词see, watch,
notice, hear, feel等要以不带to的不定式作宾补。
但变为被动语态后要补出来
I was seen to enter the bank.I saw him come downstairs.
我看见他下了楼。（说明他下楼了这件事）
I saw him coming downstairs.
我看见他在下楼。（说明他下楼时的情景）C.感官动词后既可跟不带to的不定式作宾补，
也可跟v-ing作宾补，前者表示动作的全部
过程已结束；后者表示动作正在进行。(1) 宾语补足语：(2)主语补足语：I was asked to help him with his
lessons.
She was made to give up
drinking.5 作定语（位于名词或代词之后）： e.g. Do you have anything to say? Have you got the permission to use the computer ?6 作状语（目的、结果、原因等）：We eat to live; we don’t live to eat.目的状语We went to see him only to find him out.结果状语e.g.We are glad to see you.原因状语 在too…to do …;adj./adv. + enough to do…
结构中作结果状语；在in order to ;so as to
结构中作目的状语；在be + adj. +to do …
中作原因或方式状语。 e.g. He is old enough to go to school.He got up early so as to catch the bus. I’m sorry to hear that.6 作状语（目的、结果、原因等）：被动语态主动语态to studyto be studiedto be studying一般式进行式完成式to have studiedto have
been studied动词不定式的时态和语态
不定式的时态和语态变化表1.一般式：一般式表示的动词，有时与谓语动词表示的动作同时发生，有时发生在谓语动词的动作之后。如：
It takes only a few hours to go to Beijing from Singapore by plane.（同时）
I hope to see you again. = I hope that I’ll see you again.（后来） 动词不定式的时态：
?判断不定式用哪种时态，就看不定式的动作和谓语动词的动作发生的先后关系。2. 进行式： 表示动作正在进行，与谓语动词表示的动作同时发生。如：
He seems to be eating something.
When the boss came in, the worker pretended to be working very hard. 动词不定式的时态：I’m sorry to have troubled you so much.(= I’m sorry that I have troubled you so much.)
He pretended not to have seen me before.(= He pretended that he had not seen me before) 3. 完成式：表示的动作发生在谓语
动词表示的动作之前。 We planed to have started the work at the begin-ning of the month.
我们原计划在本月初开始工作。
（但事实没有开始）
He wished to have finished his homework last night.他原想在昨晚做完作业。
（但结果没做完）注意： 在表示“希望、需要”等含义的动
词, 如： wish, hope, expect, intend,
mean, plan等的过去式之后跟不定式的完
成时，表明不定式的行为并没有实现。如：The meeting to be held tomorrow is
about how to stop the pollution.
句中to be held与逻辑主语meeting
关系为被动关系
I’d like to have been told the news earlier.
句中to have been told与逻辑主语 I 关系为被动关系4.被动式：表示与逻辑主语之间的被动关系动词不定式可跟特殊疑问句
疑问词 + to do something
(why)除外 why not + 动词原形I don’t know when I will start.
= I don’t know when to start.
I don’t know which coat I should choose.
= I don’t know which coat to choose.Why don’t you go there with me?
= why not go there with me?动词不定式的否定形式 动词不定式的否定式是在to前加not；不
带to的不定式则在动词前加not. 如：
Zhang Ming asked me not to stay at home all day.
张明要我不要整天呆在家里。
My mother let me not do it by myself.
妈妈让我不要独自做这件事Activity 2 onP34 on the textbook.
to travel during a sandstorm.
to learn more…
3. to leave…
To be completed…
To have been …ExerciseActivity 3 onP34 on the textbook.
1. to walk
2. to learn
3. to be told
4. to be completed
5. to have missed
6. to be finished
7. to seeexercise课件9张PPT。Sandstorms in AsiaModule 4Grammar 2Activity1.Look at these sentences, answer the
questions.
a.And yet we do nothing but talk about
it.
b.I can’t help but feel very concerned.
c.I can’t but wonder what will happen. but+infinitiveWhich word or phrase means except?
Which word or phrase means I have to?
What part of the verb follows the words
in bold?ab,cdo【例句1】And yet we do nothing but talk about it.
but后面跟不定式，要不要带不定式符号
“to” , 取决于它前面有没有实义动词“do”(does, did)。 讲解要点 如果有实义动词“do”的某种形式，but后要用不带“to”的不定式,否则要用带“to”的不定式。如：
She wanted nothing but to cry. (but相当于except, 表示除了……以外)
There was nothing to do but send for a doctor. 【例句2】I can’t help but feel very concerned.
can’t help but do = can’t help doing 意为“忍不住，(无法抑制)做某事”。如：
When I heard the news, I could not help but cry = When I heard the news, I couldn’t help crying.讲解要点【例句3】I can’t but wonder what will happen.
can’t but do 意为“只好，不得不”，相当于have to。如：
I can’t but admit that I made a mistake.Activity2 Underline the correct answer
1.I can’t help/but hope that they’ll succeed.
2. I can’t help but think/to think that
it was a mistake.3. I can’t chose/choose but do it.
4. He does nothing but complaining/complain.
5. I can’t help but to love/love her.
6.The workers do nothing/not but drink
tea and talk to each other.课件10张PPT。Sandstorms in AsiaModule 4Speakingcycling in a sandstormStep1.
Work in pairs. Suppose there has
been a bad sandstorm in your city.
Make a dialogue.
Student A.
You are a reporter. You interview
a man who has cycled to work in
the sandstorm.Student B.
You felt frightened but you put on
A mask and cycled to work in the
sandstorm. Tell the reporter how you feel about the sandstorm. Describe how things looked in the sandstorm. Step 2.
Make sure you know the meaning
of the following words:plastic refrigerator damage
give out pollute dioxide
carbon chemicals environment
poisonousSay how these things are bad
for the environment.
coal
plastic refrigerators (fridges)
cars
cutting down trees cutting down treesusing plastic bagspouring waste water
into rivers &oceanscars,coal
giving out poisonous
/ waste gassandstormbad soillack of waterunsafe drinking
waterillnessdesertificationrefrigerators
(fridges)Let out 氟利昂which
Destroys the ozonosphere
(臭氧层)that can absorb
ultraviolet ray(紫外线) Step 3
Think of ten things
We need to do to improve
the environment and say why. Use these
structures:
We need to(plant more trees).
We must (plant more trees).
We should(plant more trees).课件9张PPT。Sandstorms in AsiaModule 4Everyday EnglishThese words and expressions are
taken from listening and vocabulary
activity2.Choose the right answers
1. In a nutshell means _________.
(a) In my opinion
(b) to explain something very simply2. It’s scary means___________.
(a) It’s frightening
(b) It’s interesting3. I’ll do my best means _______.
(a) This is the best (explanation)
(b) I’ll try as hard as I can4. From what I understand means
______.
(a) This is what I understand
(b) I think I understand5. You’re absolutely right means_________
You’re completely right
(a) You’re almost right.Make a dialogue with the everyday
English we have just studied.Homework 课件14张PPT。Sandstorms in AsiaModule 4Writinglack of waterbad soilair pollutiondesertificationWater pollutionair pollution from carsWith the help of the pictures,
describe one environmental
problem and say what we should
do about it. Activity1.
Briefly describe this environmental
problem.
Here are some sentence patterns to help
you.
One major environmental problem is …
There is a problem with…Activity2.
Suggest a solution. Below are some
suggestions for language you can
use.
We should…..
We need to….
We must….The structure of the writing
Part1. Describing the problem
Part 2. Suggesting a solution
Part3. Write the summarization.Activity3.
Write down the solution as a
separate paragraph.One major environmental problem
is cars, because they pollute the air
with carbon dioxide.
We need to find a clear way to travel.
People should cycle and walk more.
In general, we should…..An exampleChoose any environmental
problem and finish your writing.Homework课件7张PPT。Sandstorms in AsiaModule 4TaskTask:
Designing a poster
that encourages
people to look after
the environmentA posterA posterPart 1: HeadingPart 2: A picturePart 3: More informationStructure of a poster:Task:
Design a poster that encourages people to protect the environment HELP THE PLANETFinish your poster and
write it in homework
exercise books.Homework
