外研版(2019)选择性必修第二册Unit 5A delicate world Starting out & Understanding ideas课件(共44张PPT)

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名称 外研版(2019)选择性必修第二册Unit 5A delicate world Starting out & Understanding ideas课件(共44张PPT)
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版本资源 外研版(2019)
科目 英语
更新时间 2023-11-05 17:08:52

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(共44张PPT)
Unit 5
Section A Starting out & Understanding ideas
Part 1 Reading comprehension
Part 2 Language points
目录索引
素养导航·明目标
语言 能力 必背 单词 dramatically  habitat   subsequently  appetite   multiply
chaos conservation virus decrease trap
explode collapse substantial incident owe
ecology dissolve nutrient comparison visual
session status rare apparently altitude
endangered elsewhere secure
语言 能力 重点短语 turn out    owe...to...     out of control
remove from in consequence on behalf of
重点句式 1.nor 位于句首时,句子要使用部分倒装
2.without引导隐性的虚拟语气
3.强调句式
核心语法 it作形式宾语
主题写作 英文报告
文化 意识 学生应认识到人类生存必须依赖于良好的自然生态系统,保护生态就是保护人类,加深对人与自然和谐共处这一理念的认识。
思维 品质 能够运用单元所学知识描述当地生态系统的现状并思考采取何种保护措施,实现知识和思维能力的拓展和迁移;通过运用各种学习策略,在自主、合作与探究式学习的过程中,结合单元所提供的反思性和评价性问题不断监控、评价、反思和调整自己的学习内容和进程,提高自己的理解和表达能力。
学习 能力 学生能够围绕本单元的主题语境内容,基于单元提供的现象说明、流程图等多模态语篇,综合运用各种语言技能,读懂不同类型的语篇内容;能够恰当使用it作形式宾语描述不同生态系统面临的问题和发生的变化,听懂并把握听力教材的核心思想和细节信息,使用所学语言描述某单一生物的消失可能给人类带来的灾难性影响。
Part 1 Reading comprehension
第一步 速读课文 理清脉络
Activity 1 What does the text mainly tell us
A.The history of Macquarie Island.
B.The chaos of Macquarie Island.
C.How to protect Macquarie Island.
D.How Macquarie Island was saved from destruction.
D
Activity 2 Read the passage and choose the main idea of each part.
1.Part 1 (Para.1)   A.The island’s more recent history is a tragic story.
2.Part 2 (Paras.2-5) B.Macquarie Island enjoys a wild and natural beauty.
3.Part 3 (Para.6) C.There are lots of measures to deal with the problem.
第二步 精读课文 领悟细节
Activity 3 Read the text carefully and choose the best answer.
1.According to the passage,which of the following is TRUE
A.Macquarie Island lies in the Antarctic Ocean.
B.The green grass is in harmony with the bare rock.
C.Macquarie Island is a UNESCO World Heritage Site.
D.Visitors fail to understand how its native inhabitants live with the habitat harmoniously.
C
2.Which animal came to Macquarie Island first
A.Cats.       B.Rabbits.
C.Mice and rats. D.Dogs.
3.When did Macquarie Island become an official nature reserve
A.In 1891. B.In the 1970s.
C.In the 1980s. D.In 2000.
C
B
4.Why were the dogs introduced to the island
A.To decrease the number of cats.
B.To kill the mice.
C.To catch the rabbits.
D.To diversify the species.
5.Which of the following is not Macquarie Island’s problem
A.Mice. B.Rabbits.
C.Rats. D.Birds.
A
D
Activity 4 思考分享 提升思维
1.At the very beginning,what will you do to control the rats and mice
2.Which country or region has the similar problem to Macquarie Island Say something about it.


Activity 5 诵读佳句 学练写作
Read the passage carefully and find the sentence(s) describing the steps of solving the rat,mouse and rabbit problem.
①The first step involved poison being dropped from helicopters.
②The next step is to remove the last remaining invading species,and that’s where I come in—with my dogs.
第三步 深读课文 融会提能
Activity 6 课文语篇填空
Macquarie Island is a UNESCO World Heritage Site.The green grass and bare rock contrast 1._____________(dramatic),2. _____________ (give) it a wild and natural beauty.The island’s recent history 3._____________(tell) a tragic story.In 1810 4._____________ humans arrived on the island,they brought rats and 5._____________(mouse),6. _____________ ate the birds’ eggs and attacked baby birds.Later,cats and rabbits 7._____________(introduce) to the island,making parakeets die out.Experts felt it necessary 8._____________(remove) the rabbits,but with less food cats had to eat birds.
dramatically
giving
tells
when
mice
which
were introduced
to remove
In the 1980s,traps and dogs were used to catch the cats.9._____________the disappearance of cats,the mice,rats and rabbits started to increase,which led to a serious result.It was clear that the problem needed 10._________(solve).
People are taking some steps to give the island a happy ending.
With
solving
Activity 7 长难句分析
1.        形式宾语   真正的宾语
Experts felt it necessary to come up with a plan to remove all the rabbits from the island.          后置定语
[尝试翻译]
专家认为,必须制订一个计划来清除岛上所有的兔子。
2.It turned out that they developed an immunity to the virus,and their numbers exploded once again.
[尝试翻译]
形式主语       主语从句
结果是它们对病毒产生了免疫,数量又一次激增。
Part 2 Language points
基础落实 必备知识全过关
必记写作词汇
Ⅰ.重点单词
1.       n. 栖息地
2.       n. 胃口,食欲
3.       v.(使)大大增加,(使)倍增
4.       n. 大混乱;紊乱
5.       n. 病毒
habitat 
appetite 
multiply 
chaos 
virus 
6.       v. (使)变小,(使)减少
7.       n. 夹子,陷阱
8.       v. 倒坍;塌下
9.       n. 事件
10.       v. 应该做;对……负有……的义务
decrease 
trap 
collapse 
incident 
owe
识记阅读词汇
11.halfway adj.        
12.heritage n.         
13.inhabitant n.        
14.penguin n.         
15.rat n.         
16.vegetation n.        
17.erosion n.         
18.parakeet n.         
中间的,半途的 
遗产;传统 
栖居的动物
企鹅 
大老鼠 
植物,草木(总称) 
侵蚀 
长尾(小)鹦鹉 
19.immunity n.         
20.substantial adj.         
21.postscript n.         
22.pest n.         
免疫力 
大量的,多的 
附言 
有害小动物;害虫
串记拓展词汇
23.dramatically adv.显著地→      adj.显著的,剧烈的
24.subsequently adv.后来,随后→      adj.随后的
25.conservation n.保护→       vt.保护,保存
26.departure n.离开→       vi.离开,出发
27.explode v.突然增加;爆炸→     n.爆炸,爆发→      adj.易爆炸的,可能引起爆炸的;突增的,猛增的,激增的
28.intervention n.干预,介入→      v.干涉,介入
29.ecology n.生态→      adj.生态的
dramatic
subsequent
conserve
depart
explosion
explosive
intervene 
ecological
【掌握构词规律 快速记牢单词】
副词词缀-ally:
academic→academically学术上,理论上
basic→basically 基本上,根本上
scientific→scientifically合乎科学地
energetic→energetically精力充沛地
economic→economically节约地
Ⅱ.重点短语
1.         接管;接收
2.         参加
3.         欠……;把……归因于;把……归功于……
4.be native to          
5.remove from...          
6.in consequence          
take over 
participate in 
owe...to... 
原产于;源于…… 
从……移除 
因此;结果
要点探究 能力素养全提升
基础词汇——语境记忆
1.dramatically adv.显著地
【佳句背诵】The equipment can dramatically increase the output of your company.[观点看法]
该设备可以显著提高你们公司的产量。
2.conservation n.保护
【佳句背诵】If we humans want to live in harmony with nature,we should value the wildlife conservation.[环境保护]
我们人类要想和大自然和谐相处,我们就应该重视对野生动植物的保护。
高频词汇——讲练互动
1.decrease v.减少 n.减少,缩减
decrease by... 减少了……(指减少的差值)
decrease to...减少到……(指减少后的最终结果)
decrease from...to...从……减少到……
on the decrease在减少
【佳句背诵】These measures will help decrease the cost of production.[观点看法]
这些措施有助于降低生产成本。
【即学即练】单句语法填空/单句写作
①The traffic accidents in the city decreased       30% last year.
②Is your production        the decrease
③纵使如今排放量开始减少,我们依旧面临适应气候改变的挑战。
Even if emissions were to begin ___________ ___________today,we would still face the challenge of adapting to climate change.
④小麦价格已经降低了15%。
The price of wheat ___________ ___________ ___________15%.
by
on
to decrease
has decreased by
2.trap n.陷阱;圈套;计谋;夹子 v.诱捕;设陷阱;困住
set a trap 设陷阱
be caught in a trap落入圈套;落入陷阱
be trapped in...困在……里;陷入……
【佳句背诵】The fox could not be easily trapped by the farmer.[动物描写]
那只狐狸不会轻易落入农夫的陷阱。
【即学即练】单句语法填空/单句写作
①Set      trap over that mouse hole.
②He was      (trap) in a no-win situation.
③我的手指被车门夹住了。
I ___________ ___________ ___________in the car door.
④我觉得我被工作缠住了。
I feel I___________ ___________ ___________ my job.
⑤我想会不会是一只兔子掉到了陷阱里。
I wondered if it was a rabbit ___________ ___________the trap.
a 
trapped
trapped my fingers 
am trapped in
caught in
3.explode v.爆发;激增;(使)爆炸;突然(发出巨响,活跃起来,迸发感情)
explosion n. 爆炸;爆发;激增
explode with anger勃然大怒
【佳句背诵】Bombs were exploding all around the city.[情景描写]
城里到处都响起炸弹的爆炸声。
【即学即练】单句语法填空/单句写作
①One hundred people were injured in the       (explode).
②Every time they met,Mr.Black exploded       anger.
③These fields are about         (explode)with innovation.
④这座火山已经喷发过几次了。
The volcano ___________ ___________several times.
⑤世界人口正在迅速增长。
The world population___________ ___________.
explosion
with 
to explode
has erupted
is exploding
【易混辨析】explode/burst/erupt
explode 指物体爆炸而释放大量热能的一刹那
burst 强调爆炸能量的突然释放和力量的突然迸发
erupt 主要指火山的爆发
4.owe v.欠(钱、账、人情等);归功于;应感谢
owe sb.sth.=owe sth.to sb. 欠某人某物
owe sb.an apology该向某人道歉
owe sb.a favour欠某人一个人情
owe...to...把……归功于……;应感激……
owing adj.欠着的;未付的
owing to=because of=on account of=due to 因为;由于
【佳句背诵】You must pay me what you owe.[观点看法]
你必须把你欠我的还给我。
【即学即练】单句语法填空/单句写作
①She still owes £3,000       her father.
②I think maybe we owe you       apology.
③Mary will take care of the baby—she owes me       favour.
④在被问到孩子改变的原因时,大多数家长把它归功于学校。
Most parents      it     the school when asked the reason for their children’s change.
⑤由于你的帮忙,我的学习取得了很大的进步。
___________ _________your help,I have made great progress in my study.
⑥你欠我的钱什么时候还
When can you give back the money that you __________ __________
to
an
a
owed to
Owing to
owe me
多义词汇——自主练透
Ⅰ.一词多义
multiply
A.v.迅速增加 B.v.乘,使相乘 C.v.繁殖
①If you multiply 7 by 15,you will get 105.  
②In warm weather these germs multiply rapidly.  
③Cigarette smoking multiplies the risk of cancer.  
B
C
A
Ⅱ.教材熟词生义
1.trap
项目 意义 例句
熟义 n.         I wondered if it was an animal caught in a trap.
n.         When we feel our world full of greed,tricks and traps,we are breathless.
生义 v.        A family of 10 is believed to be trapped in their collapsed home near the epicenter.
陷阱
诡计
陷入困境
2.very
项目 意义 例句
熟义 adv.        It’s very difficult to find work at the moment.
生义 adj.        That’s the very thing I need.
很,非常 
恰好的,正是的
重点句式——多维剖析
nor 位于句首时,句子要使用部分倒装
【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.
他们也能想到岛上的原居动物,包括皇家企鹅、帝企鹅、象海豹,几千年来一直与它们的自然栖息地和谐共处。
(1)部分倒装是把be动词/助动词/情态动词提到主语的前面,即助动词/情态动词/be动词+主语+谓语动词。
(2)否定词位于句首时句子要用部分倒装,高考常考的这类词汇有:never,not,nor,neither,seldom,hardly,nowhere,little,not until,by no means,in no sense,at no time等。
【佳句背诵】Tina wouldn’t agree with me.Nor would she discuss with me.[人物描写]
蒂娜不会同意我的观点,她也不会和我讨论。
【即学即练】单句语法填空/单句写作
①Never before       (have) he earned so much money in his life.
②Seldom       (do) it occur to them to wander a bit,to take a moment to see what’s around them.
③大雨下了一整夜,直到今天早上才停。
It rained heavily overnight and not until this morning _____ ______ ______.
had
did
did it stop
④我绝不会再犯同样的错误。
In no sense _____ ______ ______the same mistake.
⑤她不是医生,她的弟弟也不是。
She isn’t a doctor and _________ _________ _________ _________.
will I make
nor/neither is her brother
本 课 结 束