资源简介

(共42张PPT)
Unit 4 Natural disasters
More practice
Culture corner
Project
An ice storm is a storm characterized by freezing
rain which usually happens
in winter.
What is an ice storm
Part I Lead-in
How does an ice storm form
ice storm 冰暴
当两股冷空气相遇(一股接近地球表面，一股高高在上)，且中间还夹有一层暖空气，就会形成冰暴。从上层冷空气会形成雪花，但当雪花降落至中间暖层时，会融化成雨水，当雨水再降落并穿过最下层的冷空气层时，会发生知之甚少的所谓“过冷”现象，使雨水快速变冷至冰点以下，却依然保持液态——当这些非正常冷却水到达地面时，会马上冻结成半透明的冰凌，并包裹在所附着物的表层，形成复杂的美丽花纹。
What may an ice storm cause
Brainstorm ideas with your classmates.
There may be no electricity in people’s homes.
The roads may be covered with ice.
Crops may freeze to death and farmers may lose their businesses.
…
The North American Ice Storm of 1998 (also known as Great Ice Storm of 1998) was a massive combination of five smaller successive ice storms which combined to strike a relatively narrow swath of land from eastern Ontario to southern Quebec to Nova Scotia in Canada, and bordering areas from northern New York to central Maine in the United States, in January 1998. It caused massive damage to trees and electrical infrastructure all over the area, leading to widespread long-term power outages.
Millions were left in the dark for periods varying from days to weeks. The ice storm led to the largest deployment of Canadian military personnel since the Korean War, with over 16,000 Canadian Forces personnel deployed, 12,000 in Quebec and 4,000 in Ontario at the height of the crisis.
Part II More practice
A Read the article about a natural disaster in Canada. Then answer the questions below.
1 Why was the storm in 1998 unusual in Canada
Because it was not ordinary rain—it turned to ice as it fell through the cold air. It rained for six days and as much as ten centimetres of ice collected on roads, trees and power lines.
2 What problems did the ice storm cause
It caused many power lines to fall down and many people had no electricity. It also made the roads dangerous to walk or drive on. In addition, many homes were damaged and many people lost their businesses.
3 Did the trouble end when the ice storm stopped
Why or why not
No. Because the huge amount of ice made the whole area very dangerous. As the ice started to melt, it fell from the roofs of buildings and trees like knives. Most of the power lines were so badly damaged that they could not be repaired.
What did the people of Montreal find when they woke up on the morning of 5th January 1998
What damage did the disaster cause Give some examples.
Read the article again and answer the questions below.
They found they had no electricity in their homes.
Some families had no electricity for a whole month. Many homes were damaged and many people, especially farmers, lost their businesses.
The effect of the ice storm in 1998
Some families …
Many homes were …
And many people …
Everyone hopes that there will never be
another ice storm like the one in 1998.
B Have you ever experienced or heard about a natural disaster In groups, discuss the following questions.
What was the natural disaster like
What did people experience during the disaster
变成
醒来
期待……做……
随时
倒塌；倒下
太……以至于……
turn to
wake up
expect … to do …
at any time
fall down
so … that …
短语收藏夹
They expected the power to come back on at any time.
他们期待电力能随时恢复。
解析：expect 意为“期待；期望；期盼；预料”，
1. 后面可以接名词，表示“期盼某事”。例如：
我期盼暑假。
I expect the summer holidays.
孩子们期望儿童节快点到来。
The children expect Children’s Day to come soon.
Language points
2. 后面接不定式短语构成句型：expect (sb / sth) to do sth，意为“期望（某人/某物）做某事”；
3. 接宾语从句构成句型expect + (that) 从句。例如：
我的老师期望我考试能取得好成绩。
My teacher expects me to get good marks in the exam.
= My teacher expects that I can get good marks in the
exam.
However, the ice kept falling.
然而，冰一直在下落。
解析：keep doing sth 意为“保持/一直/继续做某事”，强调动作的持续性，相当于词组go on doing sth。例如：
那个小孩一直哭到见到他妈妈为止。
The child kept crying until he saw his mother.
= The child went on crying until he saw his mother.
【拓展】keep on doing sth 意为“继续做某事；反复做某事”，强调动作的反复性。例如：
不要反复犯同样的错误。
Don’t keep on making the same mistake.
It caused branches and whole trees to fall down.
这导致树枝折断，整棵大树倒下。
解析：cause sb / sth to do sth意为“导致/引起/造
成某人/某物做某事”。例如：
昨天的那场火灾导致五人死亡。
The fire yesterday caused five people to die.
他的幽默引得我们笑了起来。
His humour caused us to laugh.
... and the roads became even more dangerous.
……马路变得甚至更加危险。
解析：even 意为“甚至”，是程度副词，后面常跟形容词或副词的比较级，表示“甚至更……”。例如：
那个男孩甚至跑得更快。
The boy ran even faster.
具备类似用法的程度副词还有：a little，much，still，far，a lot，分别表示“更……一点”，“较……得多”，“更/非常……”等。例如：
本长得比我高一点。
Ben grows a little taller than me.
这条裙子比那条漂亮得多。
This dress is much more beautiful than that one.
这个游戏更加刺激。
This game is far more exciting.
The huge amount of ice made the whole area very dangerous.
大量的冰使整个地区都很危险。
解析：
1. make sth +adj. 意为“使/要/让某物……”。
2. make sb / sth do sth，表示“使/要/让某人/某物做某事”。
例如：
这个小男孩每天都让妈妈开心。
The little boy makes his mother happy every day.
我父母今天早上要我早起。
My parents made me get up early this morning.
Everyone hopes that there will never be another
ice storm like the one in 1998.
每个人都希望永远不要再有像1998 年那样的冰暴发生。
解析：one 在这个句子中是一个代词，代替前面的单数名词ice storm。如果代替的是复数名词，则要使用复数形式ones。
例如：
我没有笔，你能给我一支吗？
I don’t have a pen. Could you give me one
我有一本新的和几本旧的故事书。
I have a new storybook and several old ones.
一、选择最佳答案填空。
( )1. These apples are too small. I want to buy
some big ____.
A. one B. ones
C. apple D. 不填
( )2. The price of houses in Guangzhou is high
now, but it is even ____ in Beijing.
A. higher B. much high
C. high D. very high
B
A
( )3. Learning English can make us ____ more
about the world in the future.
A. to know B. known
C. know D. knowing
( )4. The football game last night made me ____.
A. to excite B. excites
C. exciting D. excited
D
C
二、根据汉语意思完成句子。
1. 为了健康，他坚持每天跑步。
He _____ _______every day to stay healthy.
2. 我期望我们将来的生活会更美好。
I _____ our life ___ ______ _____ in the future.
3. 那个女人已经疯了，老在说“儿子，回家吧”。
The woman has been mad. She _____ _____
_______, “Get home, my son.”
keeps on
keeps running
expect to become better
saying
三、用括号中所给词的适当形式填空。
Careless drivers will cause traffic accidents ________(happen) more often.
They went on ________ (look) for the lost child though it was dark.
If you get a cold, you’d better drink a little ________ (much) water.
more
to happen
looking
Culture corner
How a typhoon gets its name
Typhoon Wipha
Typhoon Matsa
Typhoon Damrey
How do typhoons get their names
Part III Culture corner
How did countries name typhoons in the old days
When did people agree on one system for naming typhoons
How many countries and regions offered the typhoons’ names
Answer the questions below according to the passage in Culture corner.
Different countries gave the same typhoon different names.
In 2000.
14.
Where do the names always come from
How many names for typhoons are there
When the names are used up, what will happen
The names of men, women, flowers, animals, trees or food items.
140.
The same names will be used over again.
What should we do if there is a typhoon
Brainstorm ideas with your classmates.
stay inside
prepare a survival kit
keep the doors and windows shut
…
Project
Natural disaster survival tips
Read the introduction and learn about the task of this project.
Part IV Project
A In groups of four, decide which natural disaster to talk about. You can use one from the box below, or a natural disaster of your choice.
Discuss what dangers may happen when a natural disaster in A happens.
What dangers may happen
B Each group should do research on how to survive the kind of natural disaster that they have chosen. Here is an example.
C Based on your research, think of at least five tips and write them on a piece of paper. Find some photos to go with your work. Follow the example.
D After each group is done, put all the pages together and make a booklet of tips on surviving a natural disaster.
Thank you!

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