Unit 5 Into the wild Understanding ideas课件（共29张）—2024-2025学年高中《英语》（外研版）必修1

(共29张PPT)
Understanding ideas P50-52
新外研版Book 1
Unit 5 Into the wild
Pre-reading
What does the video mainly talk about
It talks about monarch butterflies' amazing migration to Mexico.
Read and think:
Do you know the names of these animals
monarch butterfly
Siberian crane
red panda
Atlantic salmon
Killer whale
African lion
Look and choose the animals that migrate.
monarch butterfly
Siberian crane
red panda
Atlantic salmon
Killer whale
African lion
√
√
√
√
What do you know about animal migration
Animals that migrate
Time of animal migration
Reasons for animal migration
Influences of human activities
on animal migration
animal migration
While-reading
What is the main idea of the passage
A. The monarch’s migration.
B. The reasons for monarch’s
migration.
C. Mexico’s monarch.
The main idea of a passage can be found from its title, the topic sentence, or even the pictures.
Read the passage and find out what mystery the scientists have solved.
The scientists have solved the mystery of how monarch butterflies manage to travel a long distance and find their way to their destination.
Choose where you are most likely to find the passage.
1 In a scientific research paper about the
monarch butterfly's migration.
2 In a popular nature magazine introducing the monarch butterfly.
3 In a travel leaflet encouraging people to visit North America.
d
Read the passage carefully and do Activity 4.
a. The monarch butterfly is able to tell___________ ________.
b. Using these two pieces of information, the monarch butterfly determines _____________.
c. The monarch butterfly measures _____________ _______with its eyes.
d. The monarch butterfly reaches _______________ ____________________.
the time of
the way to go
the position of
the places where
a
day
the sun
it will spend the winter
c
b
Read the passage carefully and do Activity 4.
e. Humans _________ trees.
f. The ________________________________ where monarchs can be found is destroyed.
g. Humans use chemicals that ____________ that monarch caterpillars eat.
h. The monarch butterfly’s population __________ _________________________ in the last few years.
cut down
natural environment of many places
kill the plants
has crashed
(by as much as 90 per cent)
h
e
g
f
After-reading
Think and share:
What impresses you most about the monarch butterfly
It said,”Its population has crashed by as much as 90 per cent in the last few years”in the text. This gave me a huge shock. It' s high time that we should think over about the cause and take measures.
What can people do to help protect the monarch butterfly
Plant native milkweed species to feed on
Do not use chemicals that kill the plants as much as possible
Protect the natural environment
Language points P50-51
新外研版Book 1
Unit 5 Into the wild
课文回顾：
1. migrate:(of an animal, typically a bird or fish) move from one region or habitat to another according to the seasons. v. 迁徙
migration n. 迁移
migrant n. 候鸟；移居者
例：秋天来了，鸟儿往南飞了。
As autumn arrives, the birds
_______ south.
They migrate to find food, seek a partner, or in search of warmer weather.
1
句意：动物为了觅食、寻找配偶或温暖的环境而迁徙。
migrate
2. in search of : 搜寻，寻找
例：他们去澳大利亚淘金。
They went out to Australia __________ gold．
They migrate to find food, seek a partner, or in search of warmer weather.
1
句意：动物为了觅食、寻找配偶或温暖的环境而迁徙。
We are in search of a typist．
我们在招聘一名打字员。
The prospecting team traversed far and wide in search of mineral deposits．
地质勘探队为寻找矿藏走遍四面八方。
in search of
该句中that指代the migration, that用来指代前面提到的内容，可以指代名词单数或者不可数名词。
例：我电脑的显示器比我爸电脑的显示器好。
The monitor of my computer is better than ____ of my dad's.
One of the most wonderful migrations in nature is that of the North American monarch butterfly.
2
句意：自然界最为壮观的迁徙之一就是北美洲黑脉金斑蝶的迁徙。
The population of China is larger than that of the UK.中国的人口数量比英国多。
that
1. manage: If you manage to do something, especially something difficult, you succeed in doing it. v. 设法做到
例: 我无法知道他是如何找到我们的。
How he _________________ us is beyond us.
Somehow they managed to travel around 4,000 kilometers south and find their way to California or Mexico.
3
句意：无论怎样，它们总是能够完成约4000公里的南行旅程，成功到达加利福尼亚州或墨西哥。
managed to find
2. find one's way: (因自然或环境的力量)来到某处；流入、进入；找到解决办法；
推开人群挤过去（=push one's way）；
找到路（反义词为：lose one's way）。
例: 那条河流入大海。
The river ___________ to the sea.
Somehow they managed to travel around 4,000 kilometers south and find their way to California or Mexico.
3
句意：无论怎样，它们总是能够完成约4000公里的南行旅程，成功到达加利福尼亚州或墨西哥。
finds its way
1. determine: firmly decide. v.决定
determination n. 决心、果断
例: 他并不比她有更大的权力来决定他们的钱该怎么花。
He has no greater right than her to __________ how their money should be spent.
These two pieces of information--- the time of day and the point where the sun is in the sky ---allows the butterfly to determine the way to go.
4
句意：这两条信息——一天中的时刻和太阳在天空中的位置——让黑脉金斑蝶能够判定前进方向，最终成功抵达过冬的地点。
determine
2. allow sb to do sth 允许某人做某事
allow for sth 斟酌[情形等] ,考虑,体谅
After some hesitation, he agreed to allow me to take the course.
稍稍犹豫之后，他同意让我修这门课。
We must allow for delays caused by bad weather.
我们必须考虑到因坏天气所造成的延误。
These two pieces of information--- the time of day and the point where the sun is in the sky ---allows the butterfly to determine the way to go.
4
crash: a population crash is a decline in the number of individual members in a population, species or group of organisms. v. 锐减 crash into 闯入；撞到……上
a plane crash 飞机失事（n. 坠毁）
例：如果整个欧洲人口锐减，那么出生的婴儿就很少。
If the population _____ across Europe, we will have fewer babies.
Its population has crashed by as much as 90% in the last few years.
5
句意：其数量在近年内减少了百分之九十之多。
crash
【句法分析】这四个句子都含有定语从句。在第一句中，when 是关系副词，代替先行词a time； 第二句中，why 是关系副词，代替先行词the main reason； 第三句中，where 是关系副词，代替the places； 第四句中，that 是关系代词，第一个指代chemicals, 第二个指代the plants。
The solution to the mystery of the monarch's amazing ability comes at a time when it is in serious trouble.
Sadly, human activity is the main reason why the number of monarch butterflies is falling.
In many of the places where the butterfly can be found, people are destroying the natural environment.
They cut down trees and use chemicals that kill the plants that monarch caterpillars eat.
6
【应用示例】
1. I still remember the time when I first became a college student.
我还仍然能记得我第一次成为大学生的时候。
2. This is the place where we met ten years ago.
这是我们十年前见面的地方。
3. This is the reason why he suddenly
disappeared.
这就是他突然消失的原因。
4. Where is the book that I bought yesterday
我昨天买的书哪里去了？
【小试牛刀】
I’d like to live in a town ______ there are not too many cars.
Winter is the season __________ many animals sleep.
I can’t think ________ anyone would do that.
It was so quiet in the mountains _________ the bus stopped.
She told me about a place ________ there are thousands of butterflies.
I wish I knew _______ I failed my exams.
where
when
why
when
where
why
awareness: knowing sth exists and is important; being interested in sth.n. 意识，认识
aware adj. 知道的,注意到的,觉察的
be aware of 知道；了解
例：重要的是学生懂得如何使用互联网。
It is important that students develop an
__________ of how the Internet can be used.
The research on the monarch's behaviour has however led to a greater awareness of this creature.
7
句意：不过，对黑脉金斑蝶行为的研究也使得人们对这种生物有了更多的了解。
awareness
例：如果你先上船，给我留个位置。
__________ for me if you reach the boat first.
The more we know about this lovely creature, the greater the chance it will survive and keep its place in the natural world for a long time to come.
8
句意：我们对这种迷人的生物了解越多，它们在自然界中得以长久生存并保持其位置的可能性就越大。
Keep a place
1. keep one's place 占据位置
例：知道得越多，越会体会到自己知道得越少。
________ learned a man is, _______ you will
realize how little you know.
The more we know about this lovely creature, the greater the chance it will survive and keep its place in the natural world for a long time to come.
8
句意：我们对这种迷人的生物了解越多，它们在自然界中得以长久生存并保持其位置的可能性就越大。
2. the more..., the more...是固定搭配，“越……，就越……”。
The more
the more
Thank you!