高中英语人教版（2019）选择性必修第四册Unit 3 Sea Exploration 课件（共55张ppt）

(共55张PPT)
Unit 3 Sea Exploration
Express your opinions on sea exploration
At the end of this lesson, I will be able to:
analyzes the arguments and evidence in the texts;
express my opinions on sea exploration;
learn to write an argumentative essay.
CONTENTS
1
2
3
Lead-in
Read for information
writing task
01
Lead-in
Discuss with you partner:
Do you think we should leave oceans as they are or we should explore them
Seas and oceans have always been an attraction to human beings.
02
Read for information
1) What's the main idea of the passage
A. The risks about sea exploration.
B. The benefits about sea exploration.
C. The risks and necessities about sea exploration.
D. The balance between sea exploration and protection.
1. Read the passage quickly and choose the best answer.
2) Which of the following has sea exploration not caused according to the text
A. Overfishing. B. Air pollution.
C. More pollution. D. Damaging mineral resources.
4) What is the main idea of the third paragraph
A. The speed of the melting ice in Arctic.
B. The discovery of fossil fuels in Arctic.
C. The damaging resources in the Arctic.
D. The influence of climate on the Arctic.
3) Why does the writer mention the Deepwater Horizon
A. To show it has more gallons of oil.
B. To explain its influence on animals.
C. To stress the bad effect of plastic.
D. To prove it has caused serious pollution.
5) What should we do to protect environment according to the passage
A. To exploit the sea more.
B. To look for more fossil fuels in the Arctic.
C. To hunt whales and dolphins to earn more money.
D. To balance the environmental risks with our economic
needs.
2. Look at the two charts below and decide which one supports which text.
Text 1
Text 2
3. Answer the questions.
1) What is the text type of the passages
2) What are the three parts in argumentative essay
Argumentative essay
argument;
evidence;
restatement/recommendation/ a call to action
4. Read the texts again and find the arguments(论点)and evidence(论据)in them.
arguments evidence
Exploration causes pollution. Deepwater Horizon oil spill
Plastic pollution
Mining for resources is damaging. It hurts the Arctic.
Burning fossil fuels adds to climate change.
Overfishing is an issue. Whales and dolphins are hunted.
Banned, but some countries still doing it.
arguments evidence
Sea exploration is important for our future. Scientific research ships can help address important issues like climate change.
Understanding more about the sea will also help us manage its resources better. New medicines, food resources and energy.
Predict events such as eartquakes.
We need new resources for future development. Vast amounts of resources may be under the sea and ice.
03
Writing task
How to write an argumentative essay
Argument
Evidence
Restatement
Take Text1 as an example
Sea exploration caused problems
Pollution
Mining
Overfishing
More protection and less exploration
引言段：简单阐释要讨论的主题。
主体段：一般可提出两、三个论据，并分别进行阐述。
结论段：往往用几句话提出自己的看法、意见或建议，从而结
束文章。要注意与引言段呼应，但不能照搬前面的原话。
议论文的结构一般分为三部分：
实战演练：
假设你是李华，最近你班就“人类是否应该进行海洋探索”进行了讨论。请根据讨论结果，写一封80词左右的信给某英文报社的编辑来报道此事。
赞成的理由 反对的理由 你的看法
1. 获取更多的海底资源； 2. 提高对地球上生命的理解。 1. 造成海洋污染，导致海洋生物死亡； 2. 破坏生态系统。 ……
注意：开头和结尾已给出，不计入总词数。
审题
第一段：说明讨论的话题——人类是否应该进行海洋探索；
第二段：说明正方和反方的观点及理由；
第三段：表明自己的观点。
1. 确定文体：议论文
2. 主体时态：文章应以一般现在时为主。
3. 主体人称：由于是关于“人类是否应该进行海洋探索”的话
题，所以人称应该以第三人称为主。
谋篇
Dear Editor，
　　Recently our class has had a discussion about whether sea exploration should be carried out.
Some of the students are in favour of sea exploration. They say sea exploration has made it possible for people to discover new medicines as well as new sources of food and energy. Others are against it. Although sea exploration might help improve our understanding of the life on the earth, it might bring about marine pollution, which finally leads the ocean creatures to death. It also might cause ecosystem destruction.
Personally, sea exploration should be balanced with economic needs. Hopefully, as technology improves, we may have more options for managing this balance.
One possible version
假定你是某校的宣传委员李华，应邀为学校网站英文版写一篇有关海洋生物保护的文章，请根据以下要点写一篇短文。
1. 海洋受污染的现状;
2. 保护海洋的重要性。
注意:1.词数100左右;
2.可适当增加细节，以使文章连贯。
________________________________________________________________________________________________
【写作任务】
一、审题定调
1.确定体裁:本次写作是一篇议论文，内容涉及海洋生物保护。
2.确定人称:本文要用第三人称。
3.确定时态:时态以一般现在时为主。
二、谋篇布局
1.描述海洋受到污染的现状；
2.保护海洋的重要性；
3.自己的想法观点；
三、好词积累
1. varieties of 各种各样的
2. die out 灭绝
3. on the one hand...on the other hand 一方面…,另一方面……
4. as a matter of fact/ in fact/ actually 事实上
5. take measures 采取措施
6. keep the balance of 保持……的平衡
7. make great efforts 努力
四、高级句式
1. 众所周知，海底有各种各样的资源。(as引导的非限制性
定语从句)
As we all know, there are varieties of resources under the sea.
2.只有提高人们保护环境的意识,努力防止污染,才能解决这个
问题。(倒装句)
Only by raising people’s awareness of protecting the
environment and making great efforts to prevent pollution
can the problem be solved.
五、连句成篇
The Importance of Protecting Our Oceans
As we all know, there are varieties of resources under the sea. However, the past ten years has witnessed that some creatures have died out. Therefore, marine pollution has been greatly concerned by the whole world.
On the one hand, we must make people realize the importance of protecting the ocean. As a matter of fact, to protect the ocean is to protect human beings. On the other hand, the government should take immediate measures to keep the balance of nature. In no way should we abandon protecting the environment. Only by raising people’s awareness of protecting the environment and making great efforts to prevent pollution can the problem be solved.
¤重点词块
1．对……负责 ________________
2．盯着看；研究 ________________
3．与……有关/有联系 ________________
4．匆忙赶到 ________________
5．突然 ________________
6．发生；举行 ________________
be responsible for…　
look into
be connected to…　
hurry to　
all of a sudden
take place　
7．各种各样的 ________________
8．想出；制订出 ________________
9．以……为基础 ________________
10．大范围的；许多各种不同的 ________________
11．领先 ________________
a variety of　
come up with
be based on…　
a wide range of　
take the lead
1．opponent n．反对者；对手；竞争者
(P34)In the final match, his opponent will be stronger and more experienced.
【翻译】在最后一场比赛中，他的对手会更强，更有经验。
◇词汇拓讲
opponent adj.对立的；敌对的
opponency n．对立；敌对状态；反对行为
opponent and foe 冤家对头
【用法详解】
We must watch out for the opponent forces.
我们要提防敌对势力。
Tom outweighed his opponent by about 60 pounds.
汤姆比他的对手重约60磅。
It took her a mere 20 minutes to defeat her opponent.
她仅用了20分钟就击败了对手。
The worst thing you can do is underestimate an opponent.
最糟的事情就是低估对手。
[针对练习]
完成句子
(1)________ ________ called her a liar to her face.
她的对手当着她的面叫她骗子。
(2)He was simply too powerful ________ ________ ________.
他对于他的对手来说简直太强大了。
(3)He never gave any chance to his ________.
他从来就没有给对手任何机会。
(4)He considers all the suggestions as ________ ________.
他把所有的建议都看成是敌对的观点。
Her opponent
for his opponent
opponent
opponent ideas
2．log vt.把……载入正式记录；记录
n．正式记录；日志；原木
(P34) After finishing his workout, he updated his fitness to log.
【翻译】完成锻炼后，他更新了自己的健身日志。
log vt.把(情况)载入正式记录；记录
n．正式记录；日志；原木
log作及物动词时，还可以表示“采伐(森林的)树木；伐木”等意思
log out注销；退出系统
log in/on登录；注册；进入(计算机系统)
【用法详解】
The captain keeps a log.
船长记航海日志。
This house is made of logs.
这座房子是原木搭成的。
They burn logs for fuel.
他们烧木材获得热量。
The police log all phone calls.
警方对所有电话都做记录。
完成句子
(1)The captain ________ ________ ________ during the whole course of his voyage.
船长在整个航行中都记了日志。
(2)There are piles and ________ ________ ________ on the square.
在这个广场上堆放着一堆堆的原木。(3)I don’t know why I can’t ________ ________.
我不知道是什么原因我登录不了。
(4)She ________ what she had learned in class.
她记录了在课堂上所学的内容。
kept a log
piles of logs
log on/in
logged
3．arrest n．逮捕；拘留；中止　vt.逮捕；拘留；阻止
(P34)A $5 million reward has been announced for information leading to the arrest of those responsible for the murder.
【翻译】已宣布悬赏500万美元以获取逮捕谋杀案主犯的情报。
cardiac arrest心搏停止；心动停止；心跳停止；心跳骤停；心脏停搏
cardiopulmonary arrest心跳呼吸骤停
house arrest软禁
arrest one’s attention吸引某人的注意力
arrest sb.吸引某人
【用法详解】
The police arrested the thief.
警察逮捕了小偷。
The sight arrested my attention.
这景象吸引了我的注意力。
How’d you determine cardiac arrest
你是怎么判断心跳停止的？
You shouldn’t arrest him without warrant.
你不能毫无根据地逮捕他。
[针对练习]
完成句子
(1)Policemen have authority ________ ________ those who break the law.
警察有权逮捕犯法者。
(2)You shouldn’t ________ ________ without any reason.
你不能毫无理由地逮捕他。
(3)________ ________ caused great panic among the rioters.
他的被捕在暴徒中引起了极大的恐慌。
(4)This cartoon film ________ ________ ________ a lot.
这个卡通片吸引了这个孩子。
(5)His accent ________ ________ ________.
他的口音吸引了我们的注意。
to arrest
arrest him
His arrest
arrested the child
arrested our attention
4．look into调查；观察；窥视；浏览；看
(P34)When you look into its eyes, you may feel closely connected to it.
【翻译】当你看着它的眼睛时，你可能会觉得和它紧密相连。
look back on回顾；回忆
look after照料；关心
look down on/upon轻视；看不起
look for寻找；招来
look forward to doing sth.盼望；期待(to为介词)
look on旁观
【用法详解】
look out小心；留神
look over把……看一遍；检查
look through浏览；核查
look up向上看；好转；查字典；拜访
look up to尊重某人
The police will look into the accident.
警察将会调查这次事故。
Look into the box.What do you see
朝箱子里面看，你看到了些什么？
When I look into his eyes, it seems all the problems in the world go away.
当我看向他的眼睛，似乎世界上一切问题都消失不见了。
补全下面句子
(1)When Father was ________ the evening newspaper, he let out a cry of surprise.
(2)I’m ________ my mobile phone, but I can’t find it anywhere.
(3)These children are still too young to ________ themselves.
(4)Whenever you come across any new words in your study, you can ________ the word in the dictionary.
(5)You ought to ________ while you are crossing the street.
(6)No matter who you are, you shouldn’t ________ others.
(7)The police will ________ the accident and find out the truth.
looking through
looking for
look after　
look up
look out
look down upon
look into
5. Although this was banned in 1982,some countries are
still “murdering” these intelligent creatures without
mercy.
尽管早在1982年就已禁止,但有的国家仍地无情地
“谋杀”这些聪明的动物。
mercy n. 仁慈；宽恕；恩惠
【归纳】
mercy
短语
at the mercy of 任……处置;
对……无能为力; 任由……摆布
beg for mercy 恳请宽恕
have mercy on/upon sb.
对某人表示怜悯
show mercy to sb. 对某人表示怜悯
without mercy 无情地
merciful adj. 仁慈的；宽大的
be merciful to/ towards sb 对某人仁慈
【语境应用】用适当的介词填空。
1) They showed mercy ________ their
enemies.
2) The ship was ________ the mercy of the
storm.
3) She got on her knees and begged ________
mercy.
on
at
for
6.The sea is home to life, not human beings’ possessions.
海洋是生命的家园，而不是人类的私产。
possession n.个人财产；拥有；控制
eg The house has been in the family’s possession since
the 1500s.
Their family home and possessions were destroyed
in the fire.
be in possession of 拥有……（主语为人）
be in the possession of (sb)= be in one’s possession（某物）被 （某人）拥有
come into one’s possession 为某人所拥有
take / come into possession of 占有；拥有
possess v. 占有，拥有；控制，支配。
【语境应用】根据汉语意思补全下面句子（每空一词）。
1) 这伙人被逮住了，人赃俱获。
The gang was caught ________ ________ ________
stolen goods.
2) 离开宾馆时请记得随身携带好你的私人物品。
Please remember to take all your ________ ___________
with you when you leave the hotel.
3) Jack是个好孩子，他有很多好品质。
Jack is a good boy and _______ _______ _______ ________.
in possession of
personal possessions
possesses many good qualities