外研版（2019）选择性必修 第二册Unit5 A delicate world Starting out & Understanding ideas课件(共34张PPT)

(共34张PPT)
Unit 5 A delicate world
Period 1 Starting out&Understanding ideas
Learning aims
To know something about Macquarie Island.
To practice our reading skills.
To spur our sense of environmental protection.
Leading-in
Watch a video and answer questions:
1. What can you see in this video
2. What do you think of them
1. What can you see in this video
A beautiful island, rocks, birds, elephant seals, penguins...
2. What do you think of them
They are beautiful, gorgeous, wonderful, harmonious, amazing...
Watch a video and answer questions:
Macquarie Island:
from Chaos to Conservation
Read the passage quickly and answer the following questions.
1.Match the paragraph(s) with correct main ideas.
Para.1
Paras.2-3
Paras.4-5
Para.6
Chaos caused by humans
The process of preservation
The introduction of the island
The author’s mission
2. Choose the author's purpose in writing this passage and give your reasons.
A. To analyze how Macquarie Island was saved from destruction.
B. To inform readers of the chaos caused on Macquarie Island by humans.
C. To entertain readers with a funny story about what happened on Macquarie island.
D. To suggest ways in which an ecosystem can be protected.
Fast reading
Read Para. 1 and find out the sentences to decribe the four aspects.
Location
1486km
1294km
Shape
Inhabitants
royal penguins ; king penguins; elephant seals
long and thin
Why
Strong winds and stormy seas
In the ________________ ocean , ________ between Australia and Antarctic.
South-west Pacific
halfway
landscape
Green grass; bare rock; a wild and natural beauty
Careful reading
Read part 2(Paras.2-3)and finish the following tasks.
the chaos of the island
1. What was brought to the island
rats&mice
cats
rabbits
2. What happened after they reached the island
took over…
ate …
attacked …
ate birds
multiplied
ate vegetation
dig holes
soil erosion
more cats
have a ______effect on ecology
bad
！
humans
Humans’ __________ actions
careless




the conservation of the island
Time
Measure(s)
Purpose(s)
Result(s)
Read part 3(paras.4-6) & postscript, and fill in the blanks.
after the 1970s
in the 1980s
after 2006
release_______
use__________
drop poison,
use_______
to remove
rabbits
to_______
to remove invading species
fewer_________
but_____ birds
pest
fewer
cats
no ____
but ______rats
______rabbits
land collapse
more
more
_____free in 2014
virus
traps &dogs
dogs
catch cats
rabbits
in time
proper
to solve it once and for all
Humans’____________measures may do greater harm to ecology.
improper
Deeper thinking:
What do you think is to blame for the chaos in Macquarie Island
rats&mice
cats
rabbits
human’s careless behaviors
human's improper measures
“We humans owe it to the island to give it a happy ending.”
Macquarie Island takes on a long, thin shape,1. is because of strong
winds and 2. (storm) seas. It is a UNESCO World Heritage Site. Its native
inhabitants existed in perfect harmony with their natural habitat for thousands of
years. In 1810, humans arrived on the island with rats and mice unknowingly.
These animals quickly took over the island, 3. (bring) disasters to birds. Unfortunately cats 4. (intend) to control rats and mice developed an appetite
for birds, too. Later, rabbits 5. (introduce) but they led to greater
damage to the island. Experts came up with a plan to release a virus 6. (kill)
the rabbits, but afterwards, they developed an immunity 7. the virus, and their
8. (number) exploded once again. This incident made 9. clear that the
rat, mouse and rabbit problem needed solving once and for all. I am here to tackle
this problem. I brought trained dogs to remove the last 10. (remain)
invading species. I hope we humans owe it to the island to give it a happy ending.
which
stormy
bringing
intended
were introduced
to kill
to
numbers
it
remaining
What should we do to protect our environment
Post reading
With our joint efforts, our country is sure to become a more hospitable place. We should live harmoniously with nature.
1.appetite　n.胃口，食欲；渴望
(教材原句)Unfortunately, the cats subsequently developed an appetite for the birds, too.
不幸的是，这些猫随后也对鸟类产生了兴趣。
He had an enormous appetite for arithmetic when he was at school.
上学时他极其爱好算术。
She has a huge appetite for adventure.
她对冒险有强烈的欲望。
【知识拓展】
have/develop an appetite for 对……有/产生兴趣/欲望
lose one's appetite 某人没了食欲/欲望 spoil one's appetite 影响某人的食欲
【即学即练】单句语法填空
(1)Varieties of magazines and research papers are put out with the aim of feeding readers' appetite specific knowledge.
完成句子
(2)不要在两餐之间吃东西，以免影响胃口。
Don't by eating between meals.
(3)自从感染了病毒以后，她完全没有了食欲。
She has completely since she was infected with the virus.
spoil your appetite
for
lost her appetite
2.multiply　v.(使)大大增加，(使)倍增；(使)繁殖；乘；乘以
(教材原句)Loose on the island, they did what rabbits do best—they multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion.
它们(兔子)在岛上逍遥自在，做了最擅长做的事——它们迅速繁殖，开始吃当地的植被并且挖洞，造成了水土流失。
When the market for nutria collapsed in the late 1980s, the cat sized animals multiplied like crazy.
上世纪80年代末，当海狸鼠市场崩溃时，这种和猫一样大小的动物疯狂繁殖。Multiple genes behaved differently, depending on whether someone had eaten or not before walking.
多个基因表现不同，这取决于一个人在走路前是否吃过东西。
【知识拓展】
(1)multiply A by B A乘以B
(2)multiple adj. 多重的；多样的；许多的
【即学即练】写出下列句中multiply的含义
(1)The children are already learning to multiply and divide at the age of six.
(2)It is possible to multiply these bacteria in the laboratory.
(3)Such disputes multiplied in the eighteenth and nineteenth centuries.
完成句子
(4)如果你把6乘以9，你会得多少？
What do you get
if you multiply six by nine
大大增加
使繁殖
乘
3. decrease　v.(使)变小，(使)减少　n．减少
(教材原句)But although the virus caused the rabbit population to decrease from 130，000 to around 10，000, it also meant less food for the cats.
虽然该病毒导致兔子的数量从13万只减少到1万只左右，但这也意味着猫的食物减少了。The number of new students decreased from 210 to 160 this year.
今年新生人数从210减少到160。
There has been some decrease in military spending this year.
今年的军费开支有所减少。
【知识拓展】
(1)decrease (from...) to...　(从……)减少到…… decrease by... 减少了/降低了……
decrease in...在……方面减少/减小/下降
(2)a decrease in... 在……方面的减少 on the decrease 在减少
【即学即练】单句语法填空
(1)The number of cyclists running traffic lights is the decrease.
(2)By the end of the study, that percentage had decreased half, to 45 percent.
(3)We have no idea when the housing prices will decrease the level we can afford.
(4)There has been decrease in our imports over the years.
by
on
to
a
4. trap　n.夹子；陷阱　v．诱捕；诱骗；使陷入困境
(教材原句) In the 1980s, traps and dogs were used to catch the cats.
20世纪80年代，陷阱和狗被用来抓猫。
We set traps in the cafeteria for the mice in order to catch them.
我们在餐厅里设下夹子来逮老鼠。
Were you just trying to trap her into making some admission
你仅仅是在试图诱骗她招供吗？
【知识拓展】
(1)set/lay/place a trap 布置陷阱 fall into a trap 落入陷阱/圈套
(2)trap sb. into doing... 诱骗某人做…… be/get trapped in... 被困在……中
【即学即练】单句语法填空
(1)I was trapped telling the police all I knew.
(2)(2024·浙江1月高考)If I ever get (trap) outside my house again, my local telephone box will, sadly, no longer be able to connect me with my keys.
(3)Once you fall a trap, it will not be easy to get out of it.
完成句子
(4)他觉得自己被诱骗去接受补偿条款。
He felt the compensation terms.
into
trapped
into
he had been trapped into accepting
5. owe　v.应该做；对……负有……的义务
(教材原句) This intervention is a long, much delayed ending to a sad story, but we humans owe it to the island to give it a happy ending.
这样的干预为这个悲剧故事画上一个长长的、迟来的句号，而这是我们人类应该为这座岛所做的事情——给它一个美好的结局。
He owes his good health to the specialist's advice.
他把自身的健康归功于这位专家的建议。
I certainly owe you an apology for not writing more often.
没有给您多写信，实在抱歉。
【知识拓展】
(1)owe sb. sth.＝owe sth.to sb. 欠某人某物；把某事归功于某人
owe it to sb.that.../to do... 把……归功于某人/认为某人应该为……做……
owe sb. an apology 该向某人道歉
(2)owing to 由于
【即学即练】单句语法填空
(1)My English teacher is such a great soul, whom I owe many thanks.
(2)I owe to him that I finished my work in time.
(3)We owe it to you (complete) this job, so we hope you make efforts to help us.
it
to
to complete
1.现在分词(短语)作结果状语
(教材原句)The green grass and bare rock of its landscape contrast dramatically, giving it a wild and natural beauty.
青草和裸露的岩石地貌形成了鲜明的对比，赋予这座岛一种野性和自然的美。
Laughter does produce short term changes in the function of the heart and its blood vessels, boosting heart rate and oxygen consumption.　
笑确实会使心脏和血管的功能发生短期变化，加速心率和耗氧量。
He picked up a stone, only to have it dropped on his own foot.　他搬起石头砸了自己的脚。
【知识拓展】
(1)现在分词(短语)作结果状语常表示意料、情理之中的结果，其逻辑主语常常是整个主句。
(2)现在分词(短语)作结果状语，有时可以改为一个which引导的非限制性定语从句。
(3)不定式短语作结果状语常表示出乎意料的结果，不定式前常加only。
【即学即练】单句语法填空
(1)The snow lasted a week, (result) in serious traffic confusion in the whole area.
(2)They reached the company out of breath, only (tell) they were fired.
(3)He went out of the room with few clothes on, only (feel) rather cold.
resulting
to be told
feeling
2. 部分倒装
(教材原句)Nor would they fail to imagine how its native inhabitants, including royal penguins, king penguins, and elephant seals, existed in perfect harmony with their natural habitat for thousands of years.
他们也不难想象出那里的当地物种，包括帝企鹅、王企鹅和象海豹，数千年来是如何与它们的自然栖息地和谐共存的。
Never have I seen a situation which made him so disheartened.
我从没见过让他这么沮丧的情形。
At no time did they actually break the rules of the game, so it was unfair to punish them.
他们实际上从来都没有违反比赛的规则，处罚他们是不公平的。
【知识拓展】
当含有否定意义的词或短语如never、 hardly、 seldom、 little、 few、 not until、 not、 not only、 no sooner、 no longer、 nowhere、 by no means、 at no time、 on no account、 in no case、 under no circumstances等置于句首时，其后用部分倒装。
【即学即练】句型转换
(1)I knew little that she had already left.
→ .(倒装句)
(2)I not only knew her, but I was her best friend.
→ .(倒装句)
Little did I know that she had already left
Not only did I know her, but I was her best friend
1. storm stormy
2.drama dramatical dramatically
3. know knowing unknowing
unknowingly
4. subsequent subsequently
5. multiple multiply
6. depart departure
7.remain remaining
8.recover recovery
认知词汇
拓展词汇
chaos
halfway
habitat
loose
vegetation
erosion
reserve
immunity
collapse
substantial
Summary
应用词汇
1.appetite: develop an appetite for;lose one's appetite
2.multiply: multiple;multiply A by B
3.decrease:decrease from...to...;decrease by...;a decrease in;on the decrease
4.trap:set/lay/place a trap;fall into a trap;be trapped in
核心短语
1.in harmony with
2.take over
3.develop an appetite for
4.be introduced to
5.in turn
6.lead to
7.be native to
8.die out
9.in consequence
10.once and for all
1.现在分词(短语)作结果状语
eg: The green grass and bare rock of its landscape contrast dramatically, giving it a wild and natural beauty.
2.部分倒装
eg: Nor would they fail to imagine how its native inhabitants, including royal penguins, king penguins, and elephant seals, existed in perfect harmony with their natural habitat for thousands of years.
重点句式
课时重点回顾
Ⅰ.单词拼写
1.And contrary to existing research that says you should avoid eating with heavier people who order large portions(份), it's the beanpoles with big (食欲) you really need to avoid.
2. As many as 10 of the 17 kinds of penguins may be in danger of disappearing, the number of which has (下降) by 30% since 1987.
3.He is trying to decide whether the initative was some sort of a (圈套).
4.I can well remember the (事件) that happened on a rainy Sunday afternoon.
5.Without policemen, people could not enjoy harmony or the country would be in (混乱).
6. The report states that the gap between the rich and the poor has increased (显著地) over the past decade.
appetites
chaos
decreased
trap
incident
dramatically
Ⅱ单句语法填空
1．Teenagers climbed the stairs to deliver water and food to elderly people (trap) in powerless high rise buildings.
2．Ever since I took the leadership position, my troubles have (multiple) tenfold.
3．No one was injured in the (explode), but the ambulance was completely destroyed.
4．The hospital has recently obtained new medical equipment, (allow) more patients to be treated.
5．Owing the rain, the tablet fair was cancelled.
6． (subsequent), she persuaded her husband to allow her to work in the countryside.
trapped
multiplied
allowing
explosion
to
Subsequently
Ⅲ 完成句子 /句型转换
1．占用你那么多的时间我非常抱歉。
occupying too much of your time. 2．我希望你永远不要失去对学习的欲望。
I hope you'll never ．
3．He was trapped in a traffic jam, so he had to be patient, waiting.(分词短语作状语)
→ ,he had to be patient, waiting.
4. European football is played in 80 countries, which makes it the most popular sport in the world.(分词短语作状语)
→European football is played in 80 countries, ．
I owe you an apology for
lose your appetite for learning
Trapped in a traffic jam
making it the most popular sport in the world
Bad times make a good man.
艰难困苦出能人。