高中英语人教版 (2019)选择性必修 第四册Unit 3 Sea Exploration优秀课件ppt

教学过程

导入新课

Lead-in

1.Look at the pictures and recall something about ZhengHe and Zac. 

ZhengHe

Between 1405 and 1433, Zheng He with seven fleets sailed west not only to explore and trade, but to show off the glory of the Yongle emperor.

Zac：At age 16 Zac Sunderland set off into the Pacific Ocean on a quest, not only to see the world and have the adventure of a lifetime, but to become the youngest person to sail around the world alone. 

2.pay attention to the infinitives

Students recall something about .

ZhangHe and Zac.

Students read the sentences and pay attention to the infinitives.

To review what was talked about in previous class.

To recall the function  of infinitives.

新课

Activity 1

1.Review the functions infinitive .

Find all the sentences containing infinitives in the reading passage. Then mark their functions.

1  As the subject (S)                             

2  As the predicative (P)                   

3  As the object (O)                               

4  As the object complement (OC)  

5  As the attributive (Attr)                     

6         As the adverbial (Ad) 

2.Work in groups and read the text again to find as many examples of past participles as possible. Then discuss whether each past participle functions as an attribute, adverbial, predicative, or object complement.

       To complete the great map of the world was a strong passion for ...

       Marco Polo’s tales inspired European explorers to search for sea routes from west to east.

       Here, merchants from China and many other places met to negotiate trade deals ...                                                  

       These fleets were a sight to behold and were in a league of their own at that time.

       To reach out across the sea remains a strong desire today.                                                  

       The aim of this initiative is to encourage cooperation and ...                                                                                            

       Trading has grown greatly ..., and will continue to do so in years to come.

       ... which will help to greatly develop the whole area for the benefit of future trade and cultural exchange. 

       ... there are still many other places left to explore.

       .. China has joined other nations on several expeditions to explore the Arctic.

       ... there is an urgent need to study the Arctic in order to understand climate change and its effects.

       ... the need to trade and the desire to enhance relationships will drive China to reach out across the sea far into the future.

Summary

 不定式的构成与形式

不定式作主语

To do that sort of thing is foolish。

       当主语较长、谓语较短时，常用it作形式主语，而将不定式放到谓语的后面。

e.g. It was wise of you to refuse his invitation.

It is necessary for yong man to master two foreign languages.

不定式作宾语

I want to see you this evening.

       常跟不定式作宾语的动词：

agree, aim, arrange, choose, decide, demand, desire, determine,expect, fail, intend, learn, plan, manage, prepare, pretend,promise, refuse, threaten, wish, offer,

e.g. They intend to close the school at the earliest opportunity. 

不定式作定语

We found a house to live in.

       被only, last, next以及序数词或形容词最高级修饰的名词常用不定式   作定语。

 e.g. Mike was often the first student to arrive at school

He was the only man to pass the examination.

       有些名词后面常接不定式作定语，如ability, chance, desire, decision, effort, intention, need, opportunity, plan, promise, pressure, right, time, way等。

e.g. After months of unemployment, all he asked for was a chance to earn his bread.

不定式作状语

She came here to study English.

       不定式作状语，常表示目的、原因、结果等。

 e.g. They were glad to see their son taken good care of in the kindergarten.

To catch the bus, I got up at six this morning．

I jumped with joy to hear it.

       不定式作结果状语时，常用于“only +不定式”结构，表示未曾预料到的或令人不快的结果。

e.g. A friend of mine came to see me tonight.

Alan lifted a rock only to drop it on his own feet.

不定式作补语

I warned the patient not to eat cold water after the operation.

       跟不定式作补语的动词及动词词组：

advise, allow, ask, beg, cause, encourage, expect, forbid, force, get, intend, invite, like, love, order, persuade, prefer, remind,require,teach, tell, want, warn, wish, wait for, call on, depend on

e.g. I was interested in astronomy and he asked me to give a presentation to the class.

  We’re trying to persuade manufacturers to sell them here.

不定式作表语

All you have to do is to finish it quickly.

       不定式作表语，可以表示目的、事态发展的结果、预期的结果或不幸的结局，如

e.g.The purpose of the project was to improve the traffic condition in this city.

They are to come before noon.

       如果主语部分含有实义动词do，那么作表语的不定式可以带to，也可以不带to。这时，表语是对主语的一种说明。

e.g.All I can do is (to) leave him alone.

The least I can do is (to) write to you to say thanks.

Activity 2

Join the words to make sentences using infinitives. Then decide the function of each infinitive. 1.He/encouraged me/participate in the surfing competition

2. The storm/seems/be getting closer

3. Magellan/was the first person/sail around the world

4. The UN peacekeeping force/aims/maintain peace and prevent armed conflicts

5. The crowd/stood/applaud/scientists/for their important ocean research work

6. It is a good idea/tax/plastic bottles/so that people use them less

7. The Jiaolong manned submersible/is said/be able/reach 7 km  underwater

8. It remains/be seen/whether or not his capsule can work

Answers：

1.He encouraged me to participate in the surfing competition.    (OC)

2.The storm seems to be getting closer.        (P)

3.Magellan was the first person to sail around the world. (Attr)

4.The UN peacekeeping force aims to maintain peace and prevent armed conflicts.  (O)                                                       5.The crowd stood to applaud scientists for their important ocean research work.  (Ad)                                                         6.It is a good idea to tax plastic bottles so that people use them less.  (S)                                                                                              

7.The Jiaolong manned submersible is said to be able to reach 7 km underwater.(O; O)                                                               8.It remains to be seen whether or not his capsule can work. (O)

Activity 3

Read the beginning of The Little Mermaid and use the proper forms of the verbs in brackets to fill in the blanks.

Far out in the ocean, where the water is as clear as glass, lives the Sea King. The ocean is too deep _____________ (measure). We may imagine there is nothing except yellow sand under the sea, but actually it is not rare _________ (see) the most unique flowers and plants __________ (dance) in the fast-moving water. In the deepest spot of all stands the Sea King’s castle, which has walls of coral and a roof _________ (form) of beautiful shells. The mother of the king, a wise woman who is proud _____________ (be) born into the royal family, takes care of his six daughters.Among the six sea-princesses, the youngest is the prettiest. Although she has delicate skin like a rose-leaf and eyes as blue as the deepest sea, she has no feet but a fish tail just like her sisters. The most common way for the princesses ________ (play) all day long is ___________________ (swim) in the halls of the castle or among the flowers growing out of the walls, feeding and touching the fish ___________ (swim) up to their hands through the windows. They seem_____________(not worry) about anything, except for the youngest, who …

Answers: to measure，to see, dancing, formed, to have been, to play, to swim, swimming, not to worry.

What do you think happens next?

Suggested answer:

... who wants to see what life is like on land. She swims all the way to the surface and sees a large ship. It travels toward her at great speed and terrifies her. She swims below the surface of the water and just manages to swim away from the big ship. She now realizes that it is a scary world outside of the ocean, and she decides to stay with her family and friends under the sea.

Exercises:

根据汉语补全下面句子。

1.___________________________, that is a question.

生存还是毁灭？这是个问题。

2.It is better _________than ______________.

施比受有福。

3.You are never _________________________.

活到老学到老。

4.___________________is to know nothing.

什么都知道等于什么都不知道。

5.___________________is to lengthen life.

节约时间就是延长生命。

Answers: 1.to be or not to be 2. to give ;to take 3. too old to learn 4.To know everything 5.To save time

翻译句子

1.我能听到你的声音真高兴。

2.我忘记关灯了

3.Lucy告诉他不要哭。

4.我的梦想就是成为一名科学家。

5.我没什么可担心的。

Answers :

1.It is so nice for me to hear your voice.

2.I forgot to turn off the light.

3.Lucy told him not to cry.

4.My dream is to be a scientist.

5.I have nothing to worry about.

Students read the text again to find  examples of infinitives . Then discuss the functions of infinitives .

Students sum up the functions of infinitives .

Students join the words to make sentences using infinitives.

Students read the beginning of The Little Mermaid and use the proper forms of the verbs in brackets to fill in the blanks.

Students complete the sentences and

translate the sentences.

To practise infinitives in context and learn inductively the purpose of their use.

To  grasp the functions of infinitives.

To  practise using infinitives in the content of sentences and understand the purpose of their use.

To practise infinitives and other verbs in a paragraph.

To  consolidate the use of infinitives.

作业

Homework

Do the exercises on

Page 76 of Workbook.