高中英语人教版 (2019)选择性必修 第四册Unit 3 Sea Exploration教案配套课件ppt

这是一份高中英语人教版 (2019)选择性必修 第四册Unit 3 Sea Exploration教案配套课件ppt，共34页。PPT课件主要包含了目录页等内容，欢迎下载使用。
Pre-reading
Language pints
While-reading
Pst-reading
discver new species
detect energy resurces
predict ptential disasters
Pre-reading: Warming up
What d yu knw abut sea explratin?
Pre-reading: Discussin
What are the advantages and disadvantages f sea explratin?
Read quickly fr general understanding and answer the questins.
1. What’s the genre (体裁) f the tw texts? Argumentative essay2. What are the authrs’ attitudes t sea explratin in these tw texts? Text 1: ppsed Text 2: supprtive
Detailed-Reading：Grup wrk
Try t draw a mind map shwing 1. the structures f the texts 2. the main pints given by the authrs
Detailed-Reading：Presentatin
Argumentative Essay (Text 1)
Cnclusin (Para. 5)
Main Pint (Para. 1)
Bdy (Para. 2 ~ 4)(sub-pints & supprting ideas)
Detailed-Reading：Main structure
Opinins abut sea explratin
Main pint (Text 1):Sea explratin has caused many prblems.
Main pint (Text 2):Sea explratin is necessary.
Mre pllutin.il pllutin, water pllutin, plastic pllutin, kill birds and fish
Mining fr resurces is damaging.ice melting, climate change
Overfishing is an issue. sea creatures being hunted r murdered
Understanding mre abut the sea helps us manage its resurces better. better understand life, discver new medicines and new resurces, predict events
We need new resurces fr future develpment.Vast amunts f resurces may be under the sea and ice.
Ptential risks shuld be balanced with ecnmic needs.
The sea is mre sensitive.
Detailed-Reading
Text 1, Para. 4: Overfishing is anther prblem. Whales and dlphins are als hunted fr their meat r fr s-called research. Althugh this was banned in 1982, sme cuntries are still “murdering” these intelligent creatures withut mercy. Text 2, Para. 2: Understanding mre abut the sea will als help us manage its resurces better. Lgging new species will imprve ur understanding f life n the earth. It may help us discver new medicines, as well as new surces f fd and energy. Accessing the deep cean may als help us t predict events such as earthquakes.
Pst-reading: Appreciatin and imitatin
Lk at the tw paragraphs given by the authr, and think abut hw they develp.
Specific examples t supprt the pint
Example 1: (Main pint: Advantage)Sub-pint: Sea explratin can mitigate (减轻) deep-sea disasters.Supprting examples: New findings regarding the deep sea are very significant, thrugh which experts can knw what the situatin is dwn there and learn what t d when there are deep sea disasters, since we haven’t knwn much yet due t the lack f infrmatin. Fr example, it may give us sme valuable infrmatin abut predicting the earthquakes and tsunamis.
Try t cmplete a paragraph expressing pinins n sea explratin.
Example 2: (Main pint: Disadvantage)Sub-pint: Sea explratin will explit cean creatures.Supprting examples: Ocean explratin may lead t explitatin n sme cean creatures r marine life frms. Fr example, the verexpsing (过度曝光) f the great barrier reef (礁) may cause damage t the reef because peple wh visit it dn’t really understand hw t deal with it.
Pst-reading: Appreciatin and Imitatin
Try t cmplete a paragraph expressing pinins n sea explratin.
Writing: Sme useful expressins yu can use in yur writing
1. There is a heated debate ver the explratin f sea, and frm my pint f view When it cmes t sea explratin, peple’s pinins differ a lt It is thrugh sea explratin that many valuable resurces are What calls fr yur special attentin is that There is n dubt that ... There is n denying that ... It ges withut saying that ... It ges beynd argument that Necessary as sea explratin is, it des lead t a handful f prblems, including With all abve mentined taken int cnsideratin, it is wrthwhile t In cnclusin, the benefits f sea explratin greatly utweigh the risks in that ...
Discuss the fllwing questins with yur partners.1. What is the purpse f sea explratin?2. Hw des sea explratin help us t prtect the sea？3. Hw des sea explratin cause damage t the sea?4. Is there a gd balance between prtectin and explitatin?
Pst-reading: Writing (Discussin)
Write an argumentative essay n sea explratin, expressing yur pinins with supprting facts.
Pst-reading: Writing
Use the PEEL methd t help structure yur argument.
Writing: Present and share
Explratin and mapping f the deep sea wuld be fr the betterment f all citizens — nt just in ecnmic terms but in pprtunities fr unexpected discveries. But what we shuld take int accunt is hw t strike a balance between the prtectin and explitatin f it.
Language pints: Imprtant phrases (P32)
Language pints: Imprtant sentences (P32)
1. Plastic pllutin is als bad, killing many birds and fish, and has even been fund in ur tap water. (Para.2)2. Hpefully, as technlgy imprves, we may have mre ptins fr managing this balance. (Para.4)
1. Plastic pllutin is als bad, killing many birds and fish and has even been fund in ur tap water. (Para.2)塑料污染也十分严重，导致许多鸟类和鱼类死亡，甚至在我们的自来水中也发现了塑料污染。
分析：killing为 v-ing，作状语。
The hspital has recently btained new medical equipment, _____________ (allw) mre patients t be treated. (2017 天津)
1. Hearing the nise, I turned rund.2. Being t yung, he culdn’t jin the army.3. Wrking hard, yu’ll succeed.4. Admitting what she said, I still think that she hasn’t tried her best.5. He walked dwn the river, singing sftly t himself.6. His parents died in the war, leaving him an rphan.
v-ing 形式作状语
1. ______ (give) mre attentin, the tree culd have grwn better.2. The research is s designed that nce ______ (begin) nthing can be dne t change it. 3. _______________ (suffer) such heavy pllutin already, the river culdn’t be cleaned up.
Having suffered
2. Hpefully, as technlgy imprves, we may have mre ptins fr managing this balance. (Para.4)随着技术的进步，我们有望会有更多的选择来驾驭这一平衡。
用as, when, while填空。1. _______ I admit his gd pints, I can see his bad nes.  2. I had just started back fr the huse t change my clthes _______ I heard the vices.3. I had nt been reading fr half an hur ________ I heard steps utside.4. She stpped _________ she might have succeeded next time.5. _____ it grew darker, it became clder.
as 引导的状语从句1. He became less active as he grew lder. 2. As his family was unable t pay tuitin, he was frced t give up his studies. 3. When in Rme, d as Rmans d.4. It’s nt s / as difficult as I expected.5. Yung as he is, he knws a lt abut gegraphy.6. Try as he might, he didn’t pass the exam.7. Child as he is, he knws a lt.
【结论】as 引导让步状语从句时，常将句中的表语（包括形容词、名词或分词）、状语或动词原形提至句首，再将as置于主语之前，名词前不带冠词。
1. 空气的缺失，也解释了为什么星星在太空中似乎不像在地球上看的那样闪烁。2. 尽管雨下得很大，他们还是继续在地里干活。3. 虽然我们被敌人包围了，但是我们设法前进。
Surrunded as we were by the enemy, we managed t march frward.
Hard as it was raining, they went n wrking in the field.
The absence f air als explains why the stars d nt seem t twinkle in space as they d frm the earth.