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

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，共7页。

Teaching aims：
By the end f this perid, students will be able t:
1. identify the functins f infinitives.
2. practise using infinitives in different cntexts.
3. express yur wn ideas using infinitives.
Teaching key and difficult pints：
1.Help students t analyse the functins f infinitives in a real cntext and use infinitives prperly.
2.Instruct students t learn hw t use infinitives.
Teaching prcedures:
StepⅠLead-in
Ask students t answer sme questins based n the text in the part f Reading and Thinking.
1.Why have humans always been lnging t explre the sea?
2.What is the aim f the Belt and Rad Initiative?
Suggested answers:
1.T prmte trade and satisfy their curisity, humans have always been lnging t explre the sea.
2.The aim f the Belt and Rad Initiative is t encurage cperatin and trade acrss the histric Silk Rad areas, and strengthen the bnds between China and the rest f the wrld.
StepⅡObserve and analyse
Find all the sentences cntaining infinitives in the reading passage. Then mark their functins.
Suggested answers:
1.T cmplete the great map f the wrld(As the subject) was a strng passin fr the peple f early civilisatins.
2.Marc Pl’s tales inspired Eurpean explrers t search fr sea rutes (As the bject cmplement) frm west t east.
3.Here, merchants frm China and many ther places met t negtiate trade deals (As the adverbial), which als led t mre awareness f each ther’s cultures.
4.T reach ut acrss the sea (As the subject) remains a strng desire tday.
5.The aim f this initiative is t encurage cperatin and trade (As the predicative) acrss the histric Silk Rad areas, and strengthen the bnds between China and the rest f the wrld.
6.Trading has grwn greatly in recent years, and will cntinue t d s (As the bject) in years t cme.
7.In recent years,China has jined ther natins n several expeditins t explre the Arctic(As the attributive).
8.Frm a scientific pint f view, there is an urgent need t study the Arctic(As the attributive) in rder t understand climate change and its effects.
the need t trade(As the attributive) and the desire t enhance relatinships(As the attributive) will drive China t reach ut (As the bject cmplement) acrss the sea far int the future.
StepⅢ Practise using the infinitive
Activity 1 Jin the wrds t make sentences using infinitives. Then decide the functin f each infinitive.
1.He/encuraged me/participate in the surfing cmpetitin.
2.The strm/seems/be getting clser.
3.Magellan/was the first persn/sail arund the wrld.
4.The UN peacekeeping frce/aims/maintain peace and prevent armed cnflicts.
5.The crwd/std/applaud/scientists/fr their imprtant cean research wrk.
6.It is a gd idea/tax/plastic bttles/s that peple use them less.
7.The Jialng manned submersible/is said/be able/reach 7 km underwater.
8.It remains/be seen/whether r nt his capsule can wrk.
Suggested answers:
1.He encuraged me t participate in the surfing cmpetitin. (OC)
2.The strm seems t be getting clser. (P)
3.Magellan was the first persn t sail arund the wrld. (Attr)
4.The UN peacekeeping frce aims t maintain peace and prevent armed cnflicts. (O)
5.The crwd std t applaud scientists fr their imprtant cean research wrk. (Ad)
6.It is a gd idea t tax plastic bttles s that peple use them less. (S)
7.The Jialng manned submersible is said t be able t reach 7 km underwater. (O;O)
8.It remains t be seen whether r nt his capsule can wrk. (P)
Activity 2
Read the beginning f The Little Mermaid and use the prper frms f the verbs in brackets t fill in the blanks.
Far ut in the cean,where the water is as clear as glass,lives the Sea King. The cean is t deep (measure).We may imagine there is nthing except yellw sand under the sea,but actually it is nt rare (see) the mst unique flwers and plants (dance) in the fast-mving water.In the deepest spt f all stands the Sea King’s castle,which has walls f cral and a rf (frm) f beautiful shells.The mther f the king,a wise wman wh is prud (be) brn int the ryal family,takes care f his six daughters.Amng the six sea-princesses,the yungest is the prettiest.Althugh she has delicate skin like a rse-leaf and eyes as blue as the deepest sea,she has n feet but a fish tail just like her sisters.The mst cmmn way fr the princesses (play) all day lng is (swim) in the halls f the castle r amng the flwers grwing ut f the walls,feeding and tuching the fish (swim) up t their hands thrugh the windws.They seem (nt wrry) abut anything,except fr the yungest,wh...
Suggested answers:
t measure; t see; dancing; frmed; t have been;t play; swimming/t swim; swimming; nt t wrry
Activity 3 Read the beginning f The Little Mermaid nce again and cntinue t write what will happen next.
They seem nt t wrry abut anything except fr the yungest, wh___________________
Suggested answers:
They seem nt t wrry abut anything except fr the yungest, wh wants t see what life is like n land. She swims all the way t the surface and sees a large ship. It travels twards her at great speed and terrifies her. She swims belw the surface f the water and just manages t swim away frm the big ship. She nw realises that it is a scary wrld utside f the cean, and she decides t stay with her family and friends under the sea.
Activity 4 Cmplete the news reprt belw with the apprpriate frms f the verbs in brackets.
Acrss nrthern Africa, the desert is steadily grwing. Dry lands are spreading. But a bld prject knwn as the Great Green Wall aims 1. (stp) the grwth f the desert. The ambitius prgram includes plans 2. (help) prtect and maintain resurces and fight pverty.
Farmers are learning 3. (care) fr their land and use water wisely. They are als planting millins f trees and crps. The Great Green Wall wuld cver 4. area mre than 4,000 miles wide. The prgram receives supprt frm the United Natins, the Wrld Bank and ther grups.
The Great Green Wall’s trees prvide a barrier 5. desert winds and help hld misture in the air and sil, allwing crps 6. (grw).Mre resurces will bring mre jbs. “The gal is t create sustainable land management,” said Nra Berrahmuni, a frestry fficer 7. wrks with the Fd and Agriculture Organisatin f the United Natins.
Trees and crps have been planted in Senegal and Niger. An 8. (add) benefit f the Great Green Wall is 9. cuntries in the regin are sharing infrmatin abut which prgrams wrk and which dn’t. Nw, alng with trees, 10. (idea) are taking rt.
Suggested answers:
1.t stp 2.t help 3.t care 4.an 5.against 6.t grw 7.wh/that 8.added 9.that 10.ideas
StepⅣ Language use
Ask students t write a paragraph with any tpic using infinitives and v.-ing frm.
Suggested answers:
Recently, I have managed t becme a mre active learner. When I am reading a bk r listening t my teacher, I try t frget what I have learnt befre r what I think abut the bk r the persn giving me the infrmatin and practise cncentrating n the infrmatin itself. At the beginning, it was difficult t d s and I culdn’t help questining the ideas I was reading r hearing. But nw I have learnt t avid listening t my inner vice all the time and smetimes I even argue with it. On the ther hand, I als attempt t ask as many questins as I can. I have nticed that the answers t the questins have really helped me understand the tpic a lt better.
StepⅤ Practice
Ⅰ.Rewrite the underlined parts using infinitives.
Suggested answers:
1.t help yu keep track f
2.t recrd yur steps, speed and distance
3.t enable yu t stay hands-free
4.t make it cmfrtable t wear
Ⅱ.单句语法填空
1.Fascinated by the structural beauty f the Frbidden City as a painter, she is equally interested (learn) mre abut Chinese philsphy.
2.Vn Wng hpes that his wrk will als help pressure big cmpanies (reduce) their plastic ftprint.
3.Millins f acres f wetlands were dried (feed) and huse the ever-increasing ppulatins, greatly reducing waterfwl habitat.
4.Our aim was (see) if we culd live, in sme way, like real Parisians.
Suggested answers:
1.t learn 2.t reduce 3.t feed 4.t see