牛津译林版（2020）必修第三册Unit 1 Welcome to the unit & Reading 课件(共44张PPT，内嵌音频)

(共44张PPT)
Welcome to the unit & Reading
—Reading comprehension
Unit 1 Nature in the balance
By the end of this class, students will be able to:
1. summarize the basic information about the Amazon rainforest;
2. understand the significance of the Amazon rainforest;
3. master the technique of “making comparisons” which helps readers understand a large figure;
4. develop the awareness of protecting the Earth’s ecosystem.
CONTENTS
Pre-reading
I
While-reading
II
Post-reading
III
Sentences analysis
IV
V
Welcome to the unit
Listen to the song The Earth is our only home and discuss the following questions in pairs.
How to understand “harm” and “alarm” in this song
What is the message of the song
Welcome to the unit
Lead in
The Earth is our only home
The human race has done much harm.
We have polluted our soils and seas,
And cut down too many trees.
Now is the time to sound the alarm.
We want to live in a world that’s clean;
We want to live in a world of green.
The human race has done much harm;
Now is the time to sound the alarm.
Let’s be thankful for the skies above;
Let’s plant new trees and stop pollution;
Let’s work together to find the solution;
The Earth’s our home to protect and love.
We want to live in a world that’s clean;
We want to live in a world of green.
Let’s be thankful for the skies above;
The Earth’s our home to protect and love.
pollute soils
pollute seas
cut down too many trees
1. (1) Can you list “harm” that the song has expressed
(2) How to understand “harm” in this song
“Harm” means something bad we have done to the Earth, including polluting soils and seas, cutting down too many trees, etc.
2. (1) Can you list “alarm” that the song has expressed
(2) How to understand “alarm” in this song
Be thankful for the skies;
Plant new trees;
Stop pollution;
Find the solution.
“Alarm” means the signal that warns us of the dangers of environmental damage, which urges us to find a solution to this problem.
3. What is the message of the song
Humans have done much harm to the Earth, and we have to take action to change this situation.
Let us not, however, flatter ourselves overmuch
on account of our human victories over nature. For each such victory nature takes its revenge on us.
Let’s protect our earth together！
think too highly of ourselves
because of
punish someone who has made it suffer
What do you think the script will talk about according to the title and pictures
I think it’s about the ___________________and the ______and —_______ found there. They are all natural treasures because they are valuable to the Amazon. The pictures show that the plants and animals living in the Amazon rainforest are unusual and beautiful. There are different kinds of animals that depend on the rainforest for shelter and food.
Predicting
Amazon rainforest
plants
animals
Pre-reading
Read the documentary to check if your predictions are correct.
1. What’s the main idea of the text
A. The Amazon rainforest is the largest rainforest in the world.
B. The Amazon rainforest gives the richest biodiversity on the Earth.
C. The Amazon rainforest is a natural treasure house on the Earth.
D. The Amazon rainforest is known as the “lungs of the planet”．
√
Activity 1　Fast-reading for basic information.
While-reading
2. Read the text quickly to match the main idea with each paragraph.
Para.1　　 A．Plant biodiversity and levels of the rainforest.
Para.2 B．Animal biodiversity and food chain.
Para.3 C．Introduction to the Amazon rainforest.
Para.4 D．The rainforest’s value to the human race and
threats to the rainforest.
Para.5 E．Basic information about the rainforest.
Introduction
Basic information
Plant biodiversity
Different levels
Animal biodiversity
Food chain
Value
Threats
3. What’s the structure of the passage
Part 1: Para. 1　Part 2: Paras. 2－5
1. What’s the function of Paragraph 1
A. To emphasize the importance of the Amazon rainforest.
B. To explain why the Amazon rainforest is a natural treasure.
C. To state the status of the Amazon rainforest：the largest rainforest.
D. To lead into the following paragraphs.
Para. 1 Introduction
√
Activity 2　Careful-reading for details
How do you understand the underlined part
a sea of : ________________
alive with: ____________________________
(2) Paraphrase this sentence.
be full of living or moving things
a lot of; plenty of
Welcome to the jungle, in which there are plenty of green plants and you can hear various sounds of animals.
2. Welcome to the jungle, a huge sea of green alive with the sounds of animals.
3.Which word can be used to replace the word “significant” in Para.1
A. Light. B. Small.
C. Important. D. Middle.
√
The author writes about the ________ , the ______,the ____
and the ____________ of the Amazon rainforest.
location
size
name
biodiversity
Para. 2 Basic information
1. Fill in the blanks.
By making comparisons with familiar places or objects.
2. How does the documentary script make clear the size of the Amazon rainforest and the length of the Amazon River
The documentary script compares the size of the Amazon rainforest with that of China; The documentary script compares the length of the Amazon River with that of the Yangtze River.
Function: While the reader may find a large figure too abstract to understand, making comparisons with familiar places or objects will help them gain a better understanding.
4. What does “They” refer to in Line 10
Different ecosystems supported by the Amazon River.
3. Who may be the target audience of this documentary How can you tell
It may target Chinese people. Because the author makes comparisons with China and the Yangtze River to make the audience understand the Amazon rainforest better.
brazil nut
water lily
1. How does the author develop this paragraph
A. By listing numbers. B. By giving examples.
C. By making comparisons. D. Both A & B.
√
Para. 3 Plant biodiversity; different levels
Level 1: a system of roots(根系) beneath the ground
Level 5: (4)
Level 2:(1)
Level 3:(2)
Level 4:(3)
2. Complete the mind map about different levels of the rainforest.
Vertical
纵向的
the mass of leaf litter(落叶层)
shorter plants with large leaves
(低矮阔叶植物)
towering ancient hardwoods
the tops(树冠) of the tallest trees
1. How does the author develop this paragraph
By giving examples.
Para. 4 Animal biodiversity; Food chain
2. Complete the following chart about the food chain in the rainforest.
Jaguars
At least 87 species, including frogs
Leaves and fruit
Microorganisms
feed on
break down
feed on
feed on
get nutrients
Insects
The forest’s
food chain
①
②
③
⑤
④
Circular循环的
lungs of the planet
1. What is the value of the rainforest to us
fix
carbon
produce oxygen
a treasure house of species
Para.5 Value；Threats
2. What rhetorical device is used in this paragraph
A. Metaphor(隐喻)．
B. Personification(拟人)．
C. Parallelism(排比)．
D. Simile(明喻).
√
3. In the sentence “Yet there is one major danger to these irreplaceable plants and animals：us.”(lines 33－34)，why “us” is used instead of “human beings” here
By using “us” instead of “human beings”, the author wants to emphasize that every one of us is __________ for the damage to the ____________. Therefore, all of us have a _____ to play in protecting it.
responsible
rainforest
part
4．What is the function of the question at the end of the passage
A. To introduce the topic.
B. To introduce ways to protect the Amazon rainforest.
C. To seek for answers to protect the Amazon rainforest.
D. To arouse people’s concern about the Amazon rainforest.
√
Let’s watch a short video to feel the value of the Amazon rainforest.
1. Fill in the blanks with the figures.
8
6 million
6,400
40,000
1,300
400
20%
17%
Further reading
Why are so many figures used here
1. to provide specific and accurate information.
2. to make people realize the importance of the
rainforest in a direct way.
2. What type of writing is the passage
A. Narrative writing.
B. Exposition.
C. Argumentation.
D. Practical writing.
Features of an expository text：
Use of literary resources
Organization of information
Accuracy of language
√
3. What is the purpose of this documentary script
A. To advertise the Amazon rainforest.
B. To popularize(科普) the Amazon rainforest.
C. To persuade readers to protect wildlife.
D. To call for our joint efforts to protect the Amazon rainforest.
√
4. What is the author’s attitude towards the Amazon rainforest
A．Positive. B. Negative.
C．Objective. D. Indifferent.
√
1. What makes the Amazon rainforest a natural treasure？ (Creative thinking)
(1) The Amazon rainforest is unique, beautiful and valuable.
(2) It contains 10% of all known species on the Earth.
(3) It produces over 20% of the planet’s oxygen.
(4) Its wonderful plant and animal species have enabled
humans to make amazing discoveries.
Activity 1　Discussion
Post-reading
No. The Amazon rainforest is far too important for us to allow it to be destroyed. It helps maintain the balance of the ecosystem and provides our society with food and medicine.
2. What is your answer to the question at the end of the script (Critical thinking)
主题升华
Let’s protect the rainforest,
the ecosystem, and the earth!
Live in harmony with the nature!
The Amazon rainforest, 1._______ is the largest rainforest in the world, plays a significant role in maintaining the fine balance of the Earth’s ecosystem. The Amazon rainforest crosses into eight countries, 2._________(include) Brazil and Peru, and one overseas region of France. The Amazon River is close to 6,400 kilometres in 3._______(long). Of the 390,000 plant species 4.______(know) to humans, more than 40,000 can be found in the Amazon. The forest’s different levels support 5.____ unbelievable variety of wildlife. Each level of the forest forms its own little
which
including
length
known
an
Activity 2　Summary
world, home to different kinds of 6._______(live) things. More than 1,300 species of birds and over 400 species of mammals hide among the jungle’s plant life. The Amazon rainforest breathes life into the planet by fixing carbon and 7.__________(produce) over 20 per cent of all the Earth’s oxygen. Thus, 8.____ is often known as the “lungs of the planet”. However, over the past 50 years, about 17 per cent of the rainforest 9.______________ (disappear) due to human activities. As a result, we have to think about the question whether we can afford 10.___________(damage) the “lungs of the planet”.
producing
it
has disappeared
to damage
living
1. The Amazon rainforest crosses into eight countries, including Brazil and Peru, and one overseas region of France, all on the South American continent.
[句式分析]　此句是________句，其中including是介词，意指“_____________”；若将此句改为Brazil and Peru，and one overseas region of France (include)，空处应填_________, all on the South American continent 是_____________作状语。
[自主翻译]　
简单
包含，包括
included
亚马孙雨林穿过包括巴西、秘鲁在内的八个国家，以及一块法国的海外领地，都位于南美洲大陆。
Sentences Analysis:
独立主格结构
2．The Amazon River, from which the rainforest gets its name, is close to 6,400 kilometres in length—roughly 100 kilometres longer than the Yangtze River.
[句式分析]　此句是_________句，其中from which the rainforest gets its name是“介词＋which”引导的______________从句，修饰先行词____________________。
[自主翻译]　
复合
非限制性定语
The Amazon River
　 亚马孙雨林得名于亚马孙河，亚马孙河长约6 400千米，比长江还长大约100千米。
3．While a significant number of jaguars survive here, they are only one element of this forest’s food chain.
[句式分析]　此句是________句，While引导__________ 从句，意为_______________。
[自主翻译]
　
复合
让步状语
虽然，尽管
尽管这里生存着数量可观的美洲豹，但它们仅仅是雨林食物链的一环。
4．As the impact of human activities continues to grow and the list of species in danger of extinction becomes longer，we are left with a question：can we afford to damage the “lungs of the planet”
[句式分析]　本句为______句。as引导__________从句；we are left with a question是_______；can we afford to damage the “lungs of the planet？”作a question的_________。
[自主翻译]　
复合
时间状语
主句
同位语
随着人类活动影响的不断增加，濒危物种的名单越来越长，这就留给我们一个问题：我们能承担得起损害“地球之肺”的后果吗？
Homework
Review what we have learnt and preview language points.
THANKS