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(共73张PPT)
UNIT 5　A delicate world
(单元主题语境：人与自然——自然环境与动植物保护)
Section Ⅰ　Starting out & Understanding ideas
Ⅰ.重点词汇
1．_________ n．胃口，食欲
2．______ n．大混乱；紊乱
3．_____________ n．保护
4．______ n．病毒
5．_____ n．夹子，陷阱
6．_________ v．倒坍；塌下
7．____ v．应该做；对……负有……的义务
8．________ n．生态
appetite
chaos
conservation
virus
trap
collapse
owe
ecology
Ⅱ.拓展词汇
1．drama n．戏剧→dramatic adj.戏剧性的→____________ adv.显著地
2．________ n．(动物或植物的)生活环境；栖息地→inhabit v．居住在→__________ n．栖居的动物
3．subsequent adj.后来的；随后的→____________ adv.后来，随后
4．multiple adj.数量多的；多种多样的→________ v．(使)大大增加，(使)倍增
dramatically
habitat
inhabitant
subsequently
multiply
5．__________ n．蔬菜→__________ n．植物，草木(总称)→vegetarian n．素食主义者
6．_________ v．(使)变小，(使)减少→increase v．增加
7．depart v．离开，启程→_________ n．离开
8．________ v．突然增加→explosion n．激增；爆炸
9．substance n．物质→___________ adj.大量的，多的
10．intervene v．干预，介入→____________ n．干预，干涉
vegetable
vegetation
decrease
departure
explode
substantial
intervention
动词加后缀-ion构成名词。名词后缀-ion表示某一动作的过程、结果与状态，以及与该行为有关的事物。
conserve→conservation　correct→correction
invent→invention　direct→direction
Ⅲ.短语互译
1．与……和谐相处 _______________
2．占领；接管 _________
3．依次；反过来 _______
4．灭绝 _______
5．失去控制 ______________
6．come up with _______________
7．once and for all ___________________________
8．participate in _______________
in harmony with
take over
in turn
die out
out of control
想出，提出
彻底地，一劳永逸地
参与，参加
Ⅳ.重点句式
1．句型：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.
翻译：___________________________________________________ ______________________________________
绿草和光秃秃的岩石形成的景观反差巨大，使海岛呈
现出一种野性和自然的美。
2．句型：否定副词置于句首的部分倒装
教材原句：Nor would they fail to imagine how its native inhabitants ...existed in perfect harmony with their natural habitat for thousands of years.
翻译：____________________________________________________ _____________________________________________
他们也不会想象不出，数千年来……当地动物是如何与
其自然栖息地完美地和谐共存的。
3．句型：as引导非限制性定语从句，意为“正如”
教材原句：But as the saying goes，“While the cat's away，the mice will play.”
翻译：__________________________________________________
但正如俗语所说：“山中无老虎，猴子称大王。”
熟读精思·研读文本精华
Ⅰ.原文释译
MACQUARIE ISLAND：from Chaos① to Conservation②
I am standing on Macquarie Island，in the South-west Pacific Ocean，halfway③ between Australia and Antarctica.Strong winds and stormy seas have helped sculpt④ its long，thin shape.The green grass and bare rock of its landscape contrast dramatically⑤， giving it a wild and natural beauty． No visitor would think it surprising that the island is a UNESCO World Heritage⑥ Site. Nor would they fail to imagine⑦ how its native inhabitants⑧ ，including royal penguins⑨，king penguins，and elephant seals，existed in perfect harmony with⑩ their natural habitat for thousands of years.
But the island's more recent history tells a different story.It's a tragic story that began in 1810 when humans arrived on the island．In their ships they unknowingly brought rats and mice .These small animals quickly took over the island，eating the birds' eggs and attacking baby birds.Cats were brought to the island to control the rats and mice.Unfortunately ，the cats subsequently developed an appetite for the birds，too.
◆难词注解
①chaos n．大混乱；紊乱
②conservation n．保护
③halfway adj.中间的，半途的
④sculpt v．雕刻，雕塑
⑤dramatically adv.显著地
⑥heritage n．遗产；传统
⑦fail to do sth.未能做成某事
⑧inhabitant n．栖居的动物
⑨penguin n．企鹅
⑩in harmony with与……和谐相处；与……协调一致
habitat n．栖息地
rat n．大老鼠
mouse n．老鼠(复数形式是mice)
take over占领；接管
unfortunately adv.不幸的是
subsequently adv.后来，随后
appetite n．胃口，食欲
develop an appetite for对……产生食欲
Ⅱ.文本理解
主旨匹配
答案：Part Ⅰ～Ⅲ　BAC
文章架构
细节探究
1．Which animals are not the native inhabitants on Macquarie Island？(　　)
A．Royal penguins. B．King penguins.
C．Elephant seals. D．Rabbits.
2．What is the purpose of the island's introduction of cats？(　　)
A．To kill rats and mice.
B．To take over the island.
C．To be food for the birds.
D．To bring the island colorful.
3．What was the cause of the parakeets' dying out？(　　)
A．Their number was too large.
B．The rabbits liked to eat them.
C．Too many cats hunted the parakeets.
D．The parakeets were eaten up by the rabbits.
4．What can be inferred from the text？(　　)
A．The chaos caused on Macquarie Island by humans won't be back to normal.
B．People have to work hard together to protect the ecosystem.
C．The time spent in saving Macquarie Island won't be long.
D．Firstly dogs were introduced to Macquarie Island to catch cats.
答案：1～4　DACB
课文语法填空
Macquarie Island is a UNESCO World Heritage Site.The green grass and bare rock of its landscape 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 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，
dramatically
giving
tells
mice
which
were introduced
to remove
when
but cats had to eat birds.In the 1980s，traps and dogs were used to catch the cats.9.____ the disappearance of cats，the population of 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
Ⅲ.教材熟词生义/一词多义
1．dig
①Loose 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.______
②You'll need to dig deep into the records to find the figures you want._______________
挖掘
探究；细查
2．develop
①It turned out that they developed an immunity to the virus，and their numbers exploded once again.______
②Their bodies were well developed and super fit.______
③We need more time to see how things develop before we take action. ______
④It is important to develop good study skills.__________________
⑤Can you develop the film for me，please？__________________
产生
发育
发展
养成(习惯)；培养
冲洗(胶片)
Ⅳ.教材续写积累
自然环境描写
①Strong winds and stormy seas have helped sculpt its long，thin shape.
②The green grass and bare rock of its landscape contrast dramatically，giving it a wild and natural beauty.
[仿写]完成句子
①去年一个暴风雨的下午，我正撑着伞从学校跑回家，这时我听到一只鸟开始鸣叫。
____________________ last year，I was running home from school with my umbrella when I heard a bird start to sing.
②多么美丽啊！绿草，蓝天，到处都是盛开的鲜花，小树也很可爱。
How beautiful！_____________，__________，__________________ are everywhere，and the little trees are also very lovely.
On one stormy afternoon
The green grass
the blue sky
the blooming flowers
互动探究·精研核心知识
[要点突破]
①multiply sth.by/and sth.用某数乘以某数
A multiplied by B is C　A乘B等于C
②multiple adj.多种多样的；数量多的
③multiplication n．乘法；倍增
[写作佳句]
I arranged the bills and change from my purse to see what I had.I wished it would multiply before my eyes，but of course it didn't.
我整理了一下钱包里的钞票和零钱，看看我有什么。我希望它能在我眼前成倍增长，但它当然没有。
[学以致用]
单句填空/完成句子
①Multiply this number ________ 6 to get your heart rate per minute.
②Our problems _______________(multiply) since last year.
③Five __________(multiply) by six is thirty.
④据报道，吸烟会增加心脏病发作和其他健康问题的风险。
It is reported that smoking ______________________ heart attacks and other health problems.
by/and
have multiplied
multiplied
multiplies the risk of
[要点突破]
decrease from ...to ...从……减少到……
decrease in ...在……方面减少
decrease by ...减少了……
decrease to ...减少到……
on the decrease在下降
[写作佳句]
Additionally，the number of private cars on the street decreased a lot as public transport was a wiser choice in that horrible weather.
此外，街道上私家车的数量减少了很多，因为在那种糟糕的天气里，公共交通是一个更明智的选择。
[学以致用]
单句填空/一句多译
①The demand for tea is __ the decrease each year.
②Through the 20th century，forested area in the Philippines decreased ____ 70 percent __ 20 percent.
③The kinds of wild animals ______________(decrease) sharply in the past three decades.
④The official population is 5，300，but it decreases __ a hundred every year.
on
from
to
have decreased
by
⑤在过去的几十年里，由于全球变暖，北极的冰一直在减少。
→Over the past decades，the ice in the Arctic _____________________ as a result of global warming.(decrease vi.)
→Over the past decades，the ice in the Arctic ______________________ as a result of global warming.(decrease n．)
has been decreasing
has been on the decrease
[要点突破]
①set a trap (for sb./sth.) (给某人/某物)设下圈套
fall/walk into a trap落入圈套/陷阱
②be/get trapped in困于……；陷于……
trap sb.into (doing) sth.诱骗某人(做)某事
[写作佳句]
①When I read English，I am often trapped in the unknown words，which prevents me from understanding the main idea.
读英语时，我经常被困在不认识的单词中，这使我无法理解大意。
②(2023·新课标Ⅰ卷)Why can certain plants trap harmful bacteria
为什么某些植物能捕获有害细菌？
[学以致用]
单句填空/完成句子
①Sometimes we find ourselves _______(trap) in occasions when mobile phones fail to work，running out of battery or out of service.
②These incidents led some scientists to develop ways to keep the costly robots from _____________(trap) in the sand.
trapped
being trapped
③He felt he had been trapped ____ accepting the terms of the contract.
④它一定会照亮我们前进的道路，防止我们陷入陷阱和麻烦。
It will surely lighten the way ahead for us and prevent us from __________________ and troubles.
into
falling into traps
[要点突破]
①explode into爆发出……
explode with因……而发作
explode with laughter/anger哄堂大笑/勃然大怒
②explosion n．爆炸；爆发；激增
③explosive adj.易爆炸的；爆炸性的
[写作佳句]
①With all the anger and disappointment exploding in my heart，I finally cried，“It's not fair.I worked so hard for my bike，and it's not even new.”
所有的愤怒和失望在我心中爆发，我终于哭了起来：“这不公平。我为我的自行车花了那么多功夫，它甚至都不是新的。”
②French strawberries do not taste like cardboard.Instead，they explode in your mouth like little flavor bombs.
法国草莓尝起来并非味同嚼蜡。相反，它们就像小小的风味炸弹在你的嘴里爆裂开来。
[学以致用]
单句填空
①Fires are breaking out，and __________(explode) are happening everywhere.
②A powerful device ________(explode) outside the station.
③He owes his success to the _________(explode) growth of the export market.
④On hearing it，I exploded ____ laughter and gave the pen to her as a gift.
explosions
exploded
explosive
with
[学以致用]
选词填空(affair/incident/accident/event)
①I witnessed a traffic ________ on my way home yesterday afternoon.
②His bad behavior was just an isolated ________．
③Our manager is always dealing with daily _______．
④Reading can deepen their understanding of the ______ happening at home and abroad.
accident
incident
affairs
events
[要点突破]
①owe 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……
②owing adj.欠着的；未付的
owing to＝because of＝on account of＝due to因为；由于
[写作佳句]
With the gold medal in hand，she said loudly，“I owe my success to Shanda.She taught me better dance movements and techniques.”
手里拿着金牌，她大声说：“我的成功归功于单达。她教会了我更好的舞蹈动作和技巧。”
[学以致用]
单句填空/完成句子
①Stephen ate the noodles，feeling that he owed something ___ the shop owner.
②I owe it ___ you that I made such great progress in my spoken English.
③我该怎么感谢你呢？我欠你一个大人情。
How can I ever thank you？I ____________________．
④由于这些优秀的品质，我在学习和生活中都取得了很大的成就。
_____________________________，I have made great achievements in my study and life.
to
to
owe you a big favour
Owing to these good qualities
[情境探究]
①Not only can you describe your life in the poems，but you can also express your opinions on these topics.
你不仅可以在诗中描述你的生活，还可以表达你对这些话题的看法。
②Hardly had my dad arrived home the next day when I couldn't wait to ask.
第二天爸爸刚到家，我就迫不及待地问他。
[要点突破]
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否定词位于句首时要部分倒装，常见的这类单词和短语有never、not、seldom、rarely、hardly、nowhere、little、not until、by no means、in no sense、in no way、at no time等。
[学以致用]
句式升级
①I rarely consume sweet foods or sweet drinks.
→___________________ sweet foods or sweet drinks.(倒装句)
②“I will never give up the role！”Elizabeth told her mother.
→“_____________________________！”Elizabeth told her mother.(倒装句)
Rarely do I consume
Never will I give up the role
③I didn't realize it was time to quit the unhealthy lifestyle until I looked at my pale face in the mirror.
→______________________________________________ realize it was time to quit the unhealthy lifestyle.(倒装句)
Not until I looked at my pale face in the mirror did I

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