高中外研版 (2019)Unit 5 A delicate world示范课课件ppt

这是一份高中外研版 (2019)Unit 5 A delicate world示范课课件ppt，共47页。PPT课件主要包含了目录页，III，Homework等内容，欢迎下载使用。
Pre-reading
Language pints
Fast reading
Intensive reading
Pst-reading
Pre-reading
Lk at the picture and answer the questins.
1. What animals can yu see in the picture?
Students’ wn answers.
2. What kind f changes wuld take place if cats, rats and rabbits were intrduced t an envirnment like this ?
They wuld hunt the birds and eat the native vegetatin, thus upsetting the lcal eclgical balance.
Backgrund Infrmatin
Pre-reading
Macquarie Island – UNESCO Wrld Heritage CentreMacquarie Island (34 km lng x 5 km wide) is an ceanic island in the Suthern Ocean, lying 1,500 km suth-east f Tasmania and apprximately halfway between Australia and the Antarctic cntinent. The island is the expsed crest f the undersea Macquarie Ridge, raised t its present psitin where the Ind-Australian tectnic plate meets the Pacific plate. It is a majr
gecnservatin significance, being the nly place n earth where rcks frm the earth’s mantle (6 km belw the cean flr) are being actively expsed abve sea-level. These unique expsures include excellent examples f pillw basalts and ther extrusive rcks.
Fast reading
Read the passage and find ut what happened t Macquarie Island.
Nn-native species intrduced t Macquarie Island attacked native birds, and led t a substantial reductin f bird ppulatin and even the extinctin f parakeets. In additin, nn-native species ate and devastated the native
vegetatin. All f this played a part in upsetting the natural harmny f the island. But nw the island’s eclgy is n the rad t recvery with human effrts.
Chse the authr’s purpse in writing the passage and give yur reasns.
1. T analyse hw Macquarie Island was saved frm destructin. 2. T infrm readers f the chas caused n Macquarie Island by humans. 3. T entertain readers with a funny stry abut what happened n Macquarie Island.4. T suggest ways in which an ecsystem can be prtected.
Para 2: ... It’s a tragic stry that began in 1810 when humans arrived n the island ... Para 6: S, I am here n Macquarie Island t participate in the prgramme t track this prblem. The first step examples als give clues t the authr’s purpse in writing the passage.
Intensive reading: Find detailed infrmatin
Organize infrmatin frm the passage and cmplete the flw chart.
T live there.
Rats and mice were brught there by accident, and
they tk ver the island, eating the birds’ eggs and attacking baby birds.
Humans arrived n Macquarie Island.
Organize infrmatin frm the passage and cmplete the chart.
Cats were brught t the island.
T cntrl the rats and mice.
The cats develped an appetite fr the birds.
Rabbits were intrduced t the island.
T prvide fd fr humans.
the explding rabbit ppulatin prvided plentiful fd fr the cats. This led t mre cats hunting the birds. As a result, parakeets died ut in 1891.
Rabbits multiplied and caused sil ersin, and
A virus was released nt the island.
T remve all the rabbits frm the island.
Substantial reductin f rabbit ppulatin led t cats killing mre native birds.
Traps and dgs were used.
T catch the cats.
The departure f the cats resulted in an increasing ppulatin f rats and mice. And the rabbit ppulatin explded nce again.
Pisn and dgs were used.
T remve all the remaining invading species.
The island was pest-free and its eclgy is n the rad t recvery.
Nw talk abut hw human interference led t such severe cnsequence fr Macquarie Island.
Pst-reading: Think and share
What is yur understanding f “... we humans we it t the island t give it a happy ending” ?
Share yur wn answers.
2. D yu think it was right t eradicate the “pests” frm Macquarie Island? Give yur reasns.
3. Hw culd similar situatins be avided in the future?
T avid similar situatins in the future, we shuld prtect the natural ecsystem and be aware f the ptential impact that human activities can have n ecsystems.
4. What language can yu use t talk abut cause and effect? Hw wuld yu apply it t yur reading and writing?
1）设陷阱捕捉；夹住；卡住 Eg: It’s cruel t trap birds. 捕鸟是残忍的。2）把……困住；使陷入困境 Eg: Having been trapped in traffic, he was late fr wrk. 因为交通堵塞，他上班迟到了。
Language pints: Imprtant wrds
1. trap v. （trapped, trapped）
trap n. 1) 陷阱；夹子；罗网 set a trap fr mice 设夹子捉老鼠 2) （陷害人的）圈套；诡计 fall int a trap 落入圈套 3) 牢笼；困境 Sme peple feel that marriage is a trap. 有人认为婚姻是牢笼。
adj. dramatic
[C]（一出）戏；戏剧性事件[U] 戏剧；戏剧艺术；戏剧文学
1. 戏剧的；戏剧性的the dramatic arts 戏剧艺术2. 突然的a dramatic increase 剧增3. 给人印象深刻的a dramatic victry 激动人心的胜利
adv. 显著地；戏剧地；引人注目地
dramatically
3. harmny n. 和谐；和睦；融洽
Language pints: Imprtant wrds and expressins
In this heavenly wrld, peple live in perfect harmny with nature.在这天堂般的世界里，人与自然和谐相处。
harmnius adj. 和谐的；和睦的； harmnius sciety 和谐社会
The “Chinese Dream” is a dream t imprve peple’s well-being and a dream f harmny, peace and develpment.中国梦是提高人民幸福感的梦，是和谐、和平与发展的梦。
4. explde v.
The firewrk explded in his hand.那个爆竹在他手里响了。
2) （感情、暴力事件）爆发；激增 explde with anger 勃然大怒
Flrida’s ppulatin explded after Wrld War Ⅱ.二战后，佛罗里达州的人口迅速增加。
1) 使爆炸 explde a bmb 引爆炸弹
1. fail t d sth2. in harmny with3. develp an appetite fr4. be intrduced t 5. sil ersin6. ut f cntrl
7. remve ... frm8. decrease frm ... t9. in cnsequence10. turn ut11. a substantial number f12. nce and fr all13. every last14. we it t sb t d sth
Language pints: Imprtant phrases
原来是；结果是，证明是
(认为)应该为某人做某事
1. Nr wuld they fail t imagine hw its native inhabitants, including ryal penguins, king penguins, and elephant seals, existed in perfect harmny with their natural habitat fr thusands f years.
Language pints: Imprtant sentences
Paraphrase: They culdn’t help but imagine hw its native inhabitants, including ryal penguins, king penguins, and elephant seals, existed in cmplete unity with their natural habitat fr thusands f years.
例：1) He didn’t quit his jb, nr was he fired. 他没有辞职，也没有被解雇。 2) They culdn’t understand it at the time, and nr culd we. 他们那时无法理解这件事，我们也理解不了。
具有否定意义的副词放在句首时，句子要用部分倒装结构。
本句中nr 为否定词，它所引导的句子要用倒装语序，常见结构为：Nr + 助动词 / be 动词 / 情态动词 + 主语 + 谓语 + 其它成分
1) Never befre have I seen such a mving film.2) By n means will we give up.3) Hardly had I entered the classrm when the bell rang.
类似副词和短语还有：never, seldm, little, few, rarely, nwhere, nt until, hardly…when, n sner… than, nt nly … but als, in n way, by n means, under n circumstances etc.
fail 的其它固定搭配：fail in ding sth例：He failed in persuading Mary t g there with him. 他没能说服玛丽和他一起去。
fail t d sth 未能做成某事
例: The great bridge cannt fail t stp yu in yur tracks. 这座宏伟的大桥一定会让你止步观赏。
2. Unfrtunately, the cats subsequently develped an appetite fr the birds, t.
Paraphrase: Unfrtunately, the cats subsequently began t eat the birds, t.
develp an appetite fr ... develp a taste fr ... 对……产生兴趣develp an interest in ... develp a clse friendship with ... 与……产生亲密的友谊develp the habit f ... 养成……的习惯develp (an) immunity t ... 对……产生免疫力
例: 1）Suzy develped an interest in vilin when she was just a child. Suzy 还是小孩子的时候，就对小提琴产生了兴趣。 2） He has develped the habit f reading befre ging t bed. 他已经养成了睡前阅读的习惯。 3）They have develped (an) immunity t the virus. 他们已经对病毒产生了免疫力。
3. Lse n the island, they did what rabbits d best – they multiplied rapidly and began eating the native vegetatin and digging hles, which caused sil ersin.
Paraphrase: Rabbits were free n the island and they did what rabbits d best – they increased their numbers rapidly and began eating the lcal plants, flwers, etc and digging hles, which caused sil ersin.
1）We reached the tp f the muntain. We were tired and hungry.
形容词（短语）作状语的用法：其逻辑主语为句子的主语，是由主语相同的两个句子改写而成的。
= We reached the tp f the muntain, tired and hungry. 我们到达山顶。感觉又累又饿。
= Satisfied with it, Jane bught the bk immediately. Jane对这本书很满意，立刻就买了下来。
2）Jane was satisfied with it. She bught the bk immediately.
4. This in turn led t mre cats hunting the birds.
Paraphrase: As a result, this led t mre cats hunting the birds.
in turn 依次；轮流。还可以表示结果，相当于as a result，和下文中的 in cnsequence 同义。
例：1）The grape prductin declined greatly this year which in turn brught a rise in its price. 今年的葡萄产量大幅度下降，因此价格上涨了。 2）He was ver the age limit and in cnsequence, his applicatin was rejected. 他已超过了年龄限制，因此他的申请被拒绝了。
5. They have been trained t find every last ne, withut harming the native animals.
Paraphrase: They have been trained t find all the remaining invading species, and at the same time, they are required nt t harm the native animals.
every last 与 every single 同义，比 every 语气更强，相当于all。ne 在此代替前一句话中所说的 the last remaining invading species。
例：1) My sister ate every last biscuit. 我妹妹吃掉了所有的饼干。 2) He captured every last detail. 他抓住了每一个细节。
6.This interventin is a lng, much-delayed ending t a sad stry, but we humans we it t the island t give it a happy ending.
Paraphrase: This interventin is an ending t a sad stry which takes a lng time and is delayed much, but it’s ur respnsibility t give the island a happy ending.
we it t sb t d sth 应该为某人做某事
例：1）We we it t the heres t build a memrial. 我们应该为这些英雄建一座纪念碑。 2）We we it t ur children t clean up the envirnment. 我们应该为孩子们治理环境。