外研版（2019）选择性必修 第四册Unit5 Into the unknown Developing ideas 课件(共43张PPT)

(共43张PPT)
Unit 5 Developing ideas
Diving Deep
Learning aims
To understand the pasages about the topic of ocean exploration, and express about the topic.
To master the the key words, expressions and sentence patterns in the passage.
To think about ocean exploration in a multi-angle and logical way and develop the pioneering attitude towards the unknown.
Leading-in
Watch the video and answer the questions.
Have you ever dived into the sea
Leading-in
A shared bike
What do you know about the sea world
Look and answer:
What different zones are there in the ocean
Which parts of the ocean do you think have been explored
What do you know about the deepest part of the ocean
Pre-reading
The different zones in the
ocean are Sunlight Zone,
Twilight Zone, Midnight
Zone and Abyssal Zone.
Students’own answers.
Students’own answers.
Read the passage and find out what has
been discovered in the ocean depths.
Shipwrecks such as that of the Esmeralda, ruins of ancient cities like Neapolis, extraordinary deep-sea creatures such as bone-white coral and the barreleye, and the substance known as “fire ice” have been discovered in the ocean depths.
While reading
A. We are entering a new age of oceanic discovery.
B. We have little knowledge of Earth’s sea bed.
C. Many archaeological finds are made in shallow waters.
D. There are extraordinary creatures in the deep sea.
E. The oceans are a valuable source of natural resources.
Task 1
Read and match:
Para.1 Para.2 Para.3 Para.4 Para.5
Understand the structure of the passage.
Task 2
Diving Deep
Para. 1: Introduce the topic.
Para. 2-4:
Ocean
__________
Para. 2: the ___________
of Neapolis
Para.3: amazing _________ discoveries
Para. 5: ___________ is entering a new age of oceanic discovery.
Humankind
ruins
Para.4: __________ of natural resources
biological
discovery
exploration
Ocean Exploration
________________ exploration
Finding ancient ruins in ______________.
Working to overcome challenges and make discoveries at _________.
Example:
____________________
deep sea
MODERN AGE: exploring ________________
Archaeological
shallow waters
vast depths
the ruins of Neapolis
___________ exploration
Containing about 90 per cent of ________________.
Helping comprehend __________________________________.
Example: ____________________ _________________
___________________________________________________
Biological
the capacity for life on our planet
the planet’s fish
bone-white coral
the barreleye
life to be found even around the deep-sea volcanic openings
OVER THE CENTURIES: sailing across oceans to explore Earth’s furthest corners
Ocean Exploration
Discovery of natural resources
Discovering new natural resources.
Studying ___________ .
Identifying areas for ______________ .
Example:
_____________ ____________________________
the sea bed
deep-sea drilling
“fire ice”
China’s underwater vessels
Task 3
Read and choose:
1. What’s the main idea of the passage
A. There are millions of shipwrecks lying under waters.
B. Human’s exploration deep into the sea.
C. The tough environment of the sea bed.
D. Some new discoveries made by the scientists in the
deep sea.
2. What can we know about according to the
passage
A. We have known more about the earth than the moon.
B. Even a whole city may be buried under the waters.
C. Most of the fishes live in shallow waters.
D. Humans have reached the deepest area of the ocean
in a submarine (潜艇).
1 Why do you think the author uses statistics in the passage
2 What other examples of ocean exploration do you know of
3 What do you think drives the exploration of the oceans
4 What common message do the two reading passages in this unit convey How do they each build upon this idea
Think & Share
Students’own answers.
Students’own answers.
The use of statistics makes the passage more covincing.
Both passages convey the message that humans have the
desire and means to explore the unknown.
The first passage does this by looking at our fascination
with history’s greatest mysteries, while the second
passage looks at pioneering exploration of Earth’s oceans.
1 . retreat v .后退；离开；退避
(教材原句) Instead of retreating to their caves , some of our ancestors chose to subdue their fears and pursue the unknown—and this curiosity led them to , for instance , discover the use of fire .我们的一些祖先没有撤退到他们的洞穴，而是选择压抑他们的恐惧，追求未知——这种好奇心引导他们(发现了很多未知事物)，例如，发现了火的使用。
No retreat is owed , only advanced .
只许前进，不许后退。
After a week ' s work I like to retreat to / into the country to relax .
工作一周之后，我喜欢躲到乡下放松一下。
I will not retreat from my commitments .
我不会躲避我承诺的任务。
【知识拓展】
1. retreat to/into退到……；躲到……
retreat from从……撤退
2. beat a ( hasty ) retreat快速撤退；打退堂鼓
sound the retreat发出撤退信号
【即学即练】单句语法填空
1.It is high time that we ______________( retreat ) fromthe occupied city .
2.The soldiers were forced to retreat _____________the ship and return to the beach .
3.The enemy retreated_____________ the town , so our army had to wait for a good chance .
4.At the end of the dance,Jessica thanked him and beat __________hasty retreat.
retreated
from
to/into
a
3.shrink v .避免做,不愿做
(教材原句) While there is no need for us to shrink from new situations , we should always look into things first and consider our options .
虽然我们没有必要在新的情况下退缩，但我们应该总是先调查事情，并且考虑我们的选择。
The jeans will shrink in the wash .
那些牛仔裤洗过以后会缩水。
A shy man shrinks from meeting strangers .
羞怯的人回避见生人。
【知识拓展】
shrink from避免做，回避
shrink away退出
shrink back退缩；畏缩
shrink with因……收缩
【即学即练】单句语法填空
1. If I hadn ' t washed the sweater in the hot water , it wouldn ' t have____________ ( shrink ) .
2.They didn ' t shrink ______________the hard task .
3. Because there was something wrong with the heating , the boy shrank____________ cold .
shrunk
from
with
1.beyond the reach of　无法达到；超出……的能力之外
(教材原句)Being a tough environment of complete darkness, enormous pressure and intense cold, the ocean depths have long been beyond the reach of human exploration.
因为是一个完全黑暗、压强极大和极度寒冷的恶劣环境，海洋深处长期以来一直是人类探索无法企及的。
The shot was well beyond the reach of the goalkeeper.
这次射门使守门员鞭长莫及。
This is a mystery that lies beyond the reach of science.
这是一个科学无法解释的谜。
【知识拓展】
(1)out of reach of sb.＝out of sb.'s reach 在某人手够不到的地方
within sb.'s reach 在某人伸手可及的地方；在某人力所能及的范围内
(2)reach out 伸出(手) reach out to sb. 向某人寻求帮助
(3)reach a conclusion/decision 得出结论/做出决定
reach one's goal 实现某人的目标 reach an agreement 达成协议
【即学即练】单句语法填空
(1)Always remember to put such dangerous things like knives out reach of children.
(2) (2023 浙江1月高考) Yet as the months of reducing waste continued, I did what I could that was my own reach.
(3)When you need help, reach out the people who care about you.
within
of
to
2.check out调查，检查；付账后离开；下班；(使)离开；离职
(2024 新高考Ⅱ卷)Why not try a regional alternative or check out a popular destination’s lesser-known sights
为什么不尝试区域性的替代选择，或者游览热门目的地鲜为人知的景点呢？
【读句探究】
The accountant checked out the bills carefully .
这名会计仔细核对账单。
Bob checked out from the hotel early in the morning .
鲍勃一大早就从旅馆退房了。
We checked up and found that everything was all right .
我们检查了一下，发现一切正常。
【知识拓展】
check in登记签到；归还经登记借出的东西
check off在……上打钩
check on上班；查对；核实；检查
check over核对；仔细检查
check through检查；核对；校订
check up调查；检查探究
【即学即练】单句语法填空
1. ( 2023 新高考I卷) I checked _________________a half-dozen books on Paul Revere from the library .
2.The man checked ________________last night , and left no forwarding address （信件应转递的）新地址.
3.If you want to stay at a hotel , you have to check __________.
4.One by one she checked them ______________on her register .
out/up/through
out
in
off
1.完全倒装
(教材原句) Lying under waters across the globe are an estimated three million shipwrecks.
全球水域下沉睡着约三百万艘沉船残骸。
(教材原句) Among these is the Esmeralda, the earliest wreck from the age of the European exploration of Asia.
其中包括“埃斯梅拉达”号，它是欧洲国家探索亚洲时代留下的最早的残骸。
两句均为完全倒装句。其正常语序分别是：An estimated three million shipwrecks are lying under waters across the globe.; The Esmeralda is among these, the earliest wreck from the age of the European exploration of Asia.
【知识拓展】完全倒装的条件：
(1)表示地点、方位或时间的副词，如here、there、in、out、up、down、away、now、then等以及表示方位的介词短语置于句首时用完全倒装结构；
(2)谓语动词一般为be动词或lie、come、go、stand等动词；
(3)句子的主语是名词。注意：如果句子的主语为代词，只将副词或介词短语提前，而句子的主语和谓语要用陈述语序，如Here you are...
Near the playground is the newly built stadium in our school.
操场旁边就是我校新建的体育馆。
Hanging on the wall are two paintings by Qi Baishi.
墙上挂的是两张齐白石的画。
【即学即练】单句语法填空
(1) I was the queen of the playground. Then (come) my tweens and teens, and mean girls and cool kids.
(2) Present at the conference (be) experts from all over the world.
(3) In front of our house (stand) a tall tree with a history of over 1，000 years, which is protected by the government now.
完成句子
(4) 这是关于这次音乐节的一些相关细节。
about this music concert.
came
were
stands
Here are some relevant details
2.if型省略结构
(教材原句) Today, some 500 years after the Esmeralda set sail, there is little—if any—land on our planet left unexplored.
如今，距离“埃斯梅拉达”号起航已有差不多500年，我们的星球上尚未被人类探索的土地——如果有的话——已经少之又少了。
Correct the errors, if any (＝if there are any errors)．
如有错误就请改正。
Experts warn that medical waste from hospitals, if (it is) not handled properly, may lead to the spread of diseases.
专家警告说，医院的医疗垃圾如果处理不当，可能会导致疾病的传播。
【知识拓展】
(1)在if引导的条件状语从句中，有时可省略从句中的there be 或省略从句中与主句相同的部分，在这类省略结构中有的已构成固定结构，这类结构常见的有：
if so　如果这样 if not 不然
if necessary 如果有必要 if possible 如果有可能
if any 如果有的话，即使有……也不(主句为否定意义)
if ever 如果曾经，即使……也不(与表示否定意义的词语连用)
(2)在if引导的时间、条件或让步状语从句中，如果从句的主语和主句的主语一致，同时句中谓语含有be动词，则可省略该从句的主语和be动词，这时从句有以下两种常见结构：
①if＋现在分词(主语和从句中的谓语动词是逻辑上的主谓关系)
②if＋过去分词(主语和从句中的谓语动词是逻辑上的动宾关系)
【即学即练】单句语法填空
(1) You must attend the lecture on time if (inform) of it.
(2) You will find yourself upset by traffic jams if (live) in the centre of the city, especially during the rush hour.
完成句子
(3) Has it been a while since your last visit to a public library (如果这样), you may be surprised to learn that libraries have changed for the better.
(4) If the steps you take are working, keep it up. (不然), take another look at other methods you could try.
(5) (如果有必要), you can turn to me for help at any time.
informed
living
If so
If not
If necessary
3 . There be no need for sb . to do sth .对某人来说没必要做某事
(教材原句) While there is no need for us to shrink from new situations , we should always look into things first and consider our options .虽然我们没有必要在新的情况下退缩，但我们应该总是先调查事情，并且考虑我们的选择。
【句式分析】
本句采用了“There be no need for sb . to do sth .”句型结构，意为“对某人来说没必要做某事”。
There is no need for you to worry about your son .
你没必要为你儿子担心。
There is no need for rapid development .
没必要快速发展。
There is no doubt that the flu will be defeated .
毫无疑问流感会被打败。
【知识拓展】
( 1 ) There be no need for sth .某事物没必要
There be no need for sb to do某人没必要做某事
( 2 )其他类似句型；There be no doubt that………是毫无疑问
There be no possibility that ...….是不可能的
It is no wonder that 难怪，不足为奇
【即学即练】
1.单句语法填空
(1)The robot will put seeds into the earth , and there will be no need __________tractors .
(2)If you choose to stay at home , it is comfortable and there is no need for you_________ ( spend ) money .
(3)With your help , there is no doubt ___________we can finish the task on time.
(4)There would be a growing need ____________different methods of higher education .
for
to spend
that
for
2.完成句子
(1)__________________________________the project was completed within ten days .
这个项目在十天之内完成是不可能的。
(2)__________________________________Dr Zhong is respected by the public .
难怪钟院士被公众所尊敬。
There is no possibility that
It is no wonder that
介绍大自然神秘现象，属于说明文的范畴。写未解之谜类的文章，不能凭空杜撰，对未解之谜的现象描述要有确切来源。有些现象是真实存在的，比如纳斯卡线条，描述时要符合事实情况；有些则是来自传说和报道，描述时要介绍传说和报道的内容。对未解之谜的推测和解释也必须要有科学依据。写作时可按如下步骤进行：
1．简单介绍奇异现象或事物及其发生的地点；
2．详细叙述该奇异现象或事物的特征和神秘之处；
3．描述对此所做的科学探索，介绍科学推测。(根据情况，也可以换成自己的感受、心得、评价等。)
写作时，时态多用一般现在时，但在介绍相关的探索时应注意时态的变换。灵活运用情态动词来准确地描述和推测，如could be、may be、might have been等。
Writing
◇ 增分佳句 ◇
1．Legend has it that...
2．It's said that...
3．There have been dozens of reports that...
4．Some witnesses claimed that...
5．Why/How the ancient people built...remains a mystery.
6．Scientists, however, doubt its existence. They say...
7．Scientists have been exploring the mystery.
8．Scientists are trying to find more evidence to prove its existence.
9．So far there has been no scientific explanation for it.
10．Scientists have been exploring the area to work out the mystery.
【活学活用】
百慕大三角是20世纪最大的无法解释的现象之一。请根据以下内容用英语写一篇80词左右的作文。
1．在佛罗里达、圣胡安和百慕大之间的海上，无数飞机和船只失踪，有大量的失踪是在非常神秘的情况下发生的，这超出了人为失误、设备故障或自然灾害的可能性；
2．怀疑论者说，百慕大三角的失踪事件并不比其他海域多；
3．科学家说，尽管进行了大量的调查，许多事件至今仍然无法解释。
参考词汇：百慕大三角(the Bermuda Triangle)；佛罗里达(Florida)；圣胡安(San Juan)
【审题谋篇】
【遣词造句】
(1)遣词
① 无法解释的
② 现象
③ 对……负责
④ 失踪
⑤ 大量的
⑥ 超出了；在……之外
⑦ 可能性
unexplained
phenomenon
be responsible for
disappearance
a large number of
fall beyond
possibility
(2)造句
①百慕大三角是20世纪最大的无法解释的现象之一。
The Bermuda Triangle was of the 20th century.
②它对佛罗里达、圣胡安和百慕大之间的海洋中无数飞机和船只的失踪负有责任。
It of countless airplanes and boats in the ocean among Florida, San Juan and Bermuda.
③有大量的失踪是在非常神秘的情况下发生的。
There are that happened in very mysterious circumstances.
④这超出了人为失误、设备故障或自然灾害的可能性。
It of human error, equipment failure or natural disasters.
⑤科学家说，尽管进行了大量的调查，许多事件至今仍然无法解释。
Scientists say many incidents to this day, despite considerable investigation.
remained unexplained
one of the greatest unexplained phenomena
a large number of disappearances
was responsible for the disappearance
falls beyond the possibilities
【妙笔成篇】
The Bermuda Triangle was one of the greatest unexplained phenomena of the 20th century, which was responsible for the disappearance of countless airplanes and boats in the ocean among Florida, San Juan and Bermuda.
There are a large number of disappearances that happened in very mysterious circumstances, falling beyond the possibilities of human error, equipment failure or natural disasters. Skeptics say that the Bermuda Triangle is responsible for no more disappearances than any other area of ocean.
However, scientists say many incidents remain unexplained to this day, despite considerable investigation.
1.expolre explored unexplored
2.fascinating fascinate
3.biology biological
4.note notable
5. drill drilling
6. man manned
7. deep depth
8. value valuable
认知词汇
拓展词汇
dive
shipwreck
substance
given
fragment
transparent
stack
enormous intense notable
frontier
Summary
核心短语
1.set sail
2.continue to do sth.
3.as with
4.offer a window into...
5.at the rate of
6.be equivalent to
7.hold the record for...
8.beyond the reach of...
9.open up
10.deep sea drilling
1. 完全倒装
Lying under waters across the globe are an estimated three million shipwrecks.
2. if型省略结构
Today, some 500 years after the Esmeralda set sail, there is little—if any—land on our planet left unexplored.
重点句式
课时重点回顾
Ⅰ.单词拼写
1．The Mandarin Project is (显著的) for its scale and complexity.
2．Chemicals in the body break down our food into useful (物质)．
3．As we all know, a micrometre is one thousandth of a (毫米)．
4．The apartment is far too small for us. (另外), it is too far from our company.
5．The athletes are required to stand with their feet apart and their hands facing (向上)．
6．But the successful test (钻探，勘探) of fire ice does not mean it can be extracted for industrial use.
substances
notable
upwards
millimetre
Furthermore
drilling
Ⅱ.单句语法填空
1．Standing under the tree (be) three exchange students from Britain.
2．If more and more people join in the trend to ride bicycles to work, then the air quality will be
improved (notable)．
3．If you continue (complain) about your study, you will never make progress in it.
4．Our monitor managed (hold) the school record for 1，500 metres.
5．It is easier to say that the (equivalent) of mass and energy is an experimental fact.
6．—I'm looking for a nearby place for my holiday. Any good ideas
—How about the Moon Lake It is easy reach of the city.
7．A young girl claimed that she would hold the world record the longest hair.
notably
to hold
are
equivalence
within
for
complaining
Ⅲ. 完成句子
1．如果有必要，我们可以把聚会推迟到下周。(省略句)
,we can postpone the party until next week.
2．日本是由亚洲海岸外的四个大岛组成的。
Japan is made up of four large islands Asia.
3．They entered the classroom, and a naughty boy sat in the front of it.
→They entered the classroom, in the front of which ．(倒装句)
4．我真的很想帮助你，但我无能为力。
(1)I really want to help you, but it's ．
(2)I really want to help you, but it's ．
If necessary
off the coast of
sat a naughty boy
out of my reach
beyond my reach
A contented mind is a continual feast.
知足常乐。