人教版（2019）选择性必修四： Unit 3 Sea Explorations 课件（41张ppt）

(共41张PPT)
选修性必修四
Unit
3
Sea
Explorations
Ⅰ.
重点词汇
1.
withdraw
vt.
&vi.
撤回;
撤离
【教材原句】
Although
China
withdrew
from
further
expeditions
after
1433.
(P26)
尽管中国在1433年之后就不再进行更深的探险。
【词块必记】
(1)withdraw—withdrew—withdrawn
(2)withdraw
from　　　
撤回;
退出
withdraw
from
school
退学
withdraw
money
取钱
【知识微练】
写出黑体部分的词义
①I’d
like
to
withdraw
from
my
account(银行账户).
(
)
②The
troops(军队)
would
withdraw
as
soon
as
the
economic
crisis
ended.
(
)
完成句子
③_______________________,
he
served
as
a
shop
assistant
to
support
his
family.

辍学后,
为了养家糊口,
他当了售货员。
取钱
撤军
Withdrawing
from
school
2.
mercy
n.
仁慈;
宽恕;
恩惠
【教材原句】
Some
countries
are
still
“murdering”
these
intelligent
creatures
without
mercy.
(P32)
有些国家仍在残忍地杀戮这些机灵的生物。
【词块必记】
(1)show
mercy
to
sb.
　　　　
同情某人
have
mercy
on
sb.
怜悯某人
(2)merciful
adj.
有怜悯之心的
【知识微练】
单句语法填空
①Luckily,
we
were
treated
____
mercy.
②They
have
mercy
___
the
homeless.
③The
________
(mercy)
king
saved
the
young
officers
from
death.
④Out
of
kindness,
the
merciful
manager
showed
mercy
__
the
poor
people.
with
on
merciful
to
3.
possession
[usually
pl.
]
n.
个人财产;
拥有;
控制
【教材原句】
The
sea
is
home
to
life,
not
human
beings’
possessions.
(P32)
海洋是生命的源泉,
而非人类的私有财产。
【词块必记】
(1)possess
　　　　　　　　
vt.
拥有
(2)possessions
n.
财产
in
possession
of
拥有
in
the
possession
of
被……所拥有
take
possession
of
拥有
【知识微练】
单句语法填空
①People
had
lost
their
homes
and
all
their
__________(possess).
②We
should
take
possession
__the
land.
③_________
(possess)
by
the
scientist,
the
device
can
bring
its
potential
into
full
play.
possessions
of
Possessed
完成句子
④I’m
afraid
he
_____________________________.

恐怕他没有什么幽默感。
⑤The
gang
was
caught
______________stolen
goods.

这伙人被逮住,
人赃俱获。
doesn’t
possess
a
sense
of
humour
in
possession
of
Ⅱ.
核心短语
4.
in
return
for
作为回报;
换取
【教材原句】
African
royal
families
sent
gifts
such
as
giraffes
as
gestures
of
friendship
in
return
for
gold,
silk,
and
spices.
(P26)作为友谊的象征,
非洲皇室会赠送长颈鹿等礼物,
以换取黄金、丝绸和香料。
【词块必记】
(1)return
to
someplace　　　　
重返某地
return
sth.
to
sb.
归还
return=go
back
/come
back
(2)in
turn
轮流,
依次
take
one’s
turn
to
do
sth.
轮到某人做某事
【知识微练】
完成句子
①He
leaves
the
house
to
his
sister
_______________________(作为她好心的
回报).

②I
persuaded
him
to
______________(返回中国).

③She
is
still
upset
and
__________________________(焦急地等他回来).

④He
bought
a
___________(双程票)and
boarded
the
next
train
for
home.

in
return
for
her
kindness
return
to
China
waits
for
his
return
anxiously
return
ticket
【典句赏析】
The
passenger
wants
to
give
his
money
back
in
return
for
a
return
ticket.
那位乘客想把钱退回来换取一张返程票。
5.
set
sail
起航;
开航
【典型例句】
Merchants
and
explorers
from
the
East
set
sail
from
east
to
west
many
years
before
Columbus
first
did.
来自东方的商人和探险家比哥伦布第一艘船早许多年就从东向西航行了。
【词块必记】
set
off
for　　　　　
出发动身去某地
set
out
to
do
着手做某事
set
about
doing
着手做某事
set
aside
拨出,
留出
be
set
in
以……为背景
【知识微练】
用set短语填空
①The
hotel
manager
________two
pleasant
rooms
for
us.

②The
cleaner
________cleaning
the
room.

③The
novel
_______the
Second
World
War.

④He
suggested
that
we
should
_________Beijing
immediately.

set
aside
set
about
is
set
in
set
off
for
【典句赏析】
To
deal
with
the
pollution
issue,
the
government
has
set
out
to
take
action.
为了解决污染问题,
政府已经开始采取行动。
【补充要点】
1.
profession
n.
职业;
行业
【教材原句】
Henry
Norman
Bethune
devoted
his
life
and
profession
to
helping
people.
(P28)亨利·诺曼·白求恩将他的生命和职业都献给了帮助人们。
【词块必记】
(1)professor　　　　　
n.
教授
(2)professional
adj.
专业的
【熟词生义】
I
don’t
believe
her
profession
of
friendship
for
us.
(
)
声称,
声明,
表白
【知识微练】
单句语法填空
①He
is
a
doctor
by
_________.
(professional)
②He
is
___________
(profession)
in
literature.
③She
is
a
________
(profession)
and
she
wants
to
buy
some
relevant
___________
(profession)
books.
profession
professional
professor
professional
【典句赏析】
His
ability
carried
him
to
the
top
of
his
profession.
他的才能使他在他的行业中名列前茅。
2.
cover
v.
&n.
覆盖;
报道;
占据;
行军路程;
书面,
封皮
【教材原句】
To
truly
understand
our
planet,
we
must
explore
the
oceans
which
cover
most
of
it.
(P32)
为了更真实地了解我们的星球,
我们必须探索海洋,
海洋覆盖了星球的大部分。
【词块必记】
be
covered
with　　　
被……覆盖
cover
the
latest
news
报道了最新的消息
cover
about
2,
000
square
kilometers
占据大约2
000平方千米的土地
cover
an
area
of.
.
.
占地多少
【知识微练】
单句语法填空
①There
is
a
farm
________
(cover)
more
than
100
acres.
②What
an
amazing
sight!
The
ground
is
_______(cover)
with
the
snow.
写出黑体部分的词义
③The
law
does
not
cover
all
crimes.
(
)
④They
covered
60
miles
in
two
days.
(
)
⑤$100
should
cover
your
expenses.
(
)
covering
covered
涉及
行走
足够支付
3.
in
hand
在手头;
可供使用
【教材原句】
With
lots
of
food
and
drink
in
hand,
they
set
off
for
their
picnic.
(P28)
在手头有很多食物和饮料之后,
他们出发去野餐了。
【词块必记】
at
hand　　　　　
在手边;
即将到来
on
hand
在手头;
到场,
在场
by
hand
用手工
【知识微练】
单句语法填空
①The
exam
is
near
__
hand.

②The
letter
was
written
___
hand.
③I
still
have
some
money
_____hand.

④My
shoes
were
made
___
hand.
at
by
in/
on
by
【典句赏析】
I
am
very
pleased
to
hear
that
the
holiday
is
at
hand/around
the
corner/approaching.
我很高兴听到假期临近/即将来临。
IV.话题写作
阅读下面短文,
根据其内容写一篇60词左右的内容概要。
In
1971,
China’s
first
subway
line
in
Beijing
was
formally
put
into
operation.
By
December
2017,
there
were
171
subway
lines
stretching
over
5,
083
km
in
35
cities
on
the
Chinese
mainland.
Currently,
China
has
the
longest
urban
railway
network
in
the
world.
The
rapid
development
of
China’s
urban
railway
system
reflects
the
country’s
growing
economic
strength.
The
system
has
experienced
the
fastest
growth
over
the
past
15
years
due
to
the
investment
of
wealth
accumulated
from
the
reform
and
opening
up
in
urban
infrastructure
construction.
An
urban
railway
system
is
expensive
to
build,
with
one
kilometer
of
subway
costing
approximately
700
million
yuan($110
million).
A
city
without
economic
strength
cannot
develop
such
an
expensive
system.
The
progress
in
urban
railway
construction
technologies
has
also
contributed
to
the
fast
expansion
of
the
infrastructure.
Subway
construction
involves
building
underground
tunnels,
laying
rails,
manufacturing
trains
and
the
operation
and
management
of
subways.
It
is
a
systematic
project
which
not
only
covers
traditional
infrastructure
building
but
also
modern
electronics
and
information
technology.
China’s
railway
construction
technologies
are
the
best
in
the
world,
with
Chinese
subway
trains
now
exported
to
developed
countries
including
the
United
States.
The
expansion
of
Chinese
cities
has
made
it
necessary
to
develop
urban
railway
systems.
Since
the
start
of
the
reform
and
opening
up,
a
large
number
of
people
have
migrated
to
cities
and
the
number
of
private
cars
has
increased
dramatically,
resulting
in
serious
traffic
congestion.
Building
subways
has
become
an
important
way
to
solve
this
problem.
The
rapid
development
of
China’s
urban
railway
system
exemplifies
the
achievements
made
by
the
policy.
As
China
furthers
its
opening
up,
it
will
continue
to
maintain
steady
and
rapid
economic
growth
and
railway
systems
will
be
available
in
more
and
more
cities.
________________________________________________________________________________________________________________________________________
Step
1　写作技巧
1.
通读全文,
确定体裁,
明确主题
体裁:
说明文
主题:
中国地铁的发展
2.
定位主题句和关键词,
变换表达方式(词性转换+句式转换)
①The
rapid
development
of
China’s
urban
railway
system
reflects
the
country’s
growing
economic
strength.
(词性转换)
→The
fast
development
of
Chinese
urban
railway
system
is
____________
China’
s
prosperous
economy.

a
reflection
of
②The
progress
in
urban
railway
construction
technologies
has
also
contributed
to
the
fast
expansion
of
the
infrastructure.
The
expansion
of
Chinese
cities
has
made
it
necessary
to
develop
urban
railway
systems.
(句式转换:
将两句用not
only.
.
.
but
also连接成一句)
→______________________________________________________________
____________stimulates
the
urban
railway
construction.

Not
only
the
growing
construction
technologies
but
also
the
expansion
of
Chinese
cities
③As
China
furthers
its
opening
up,
it
will
continue
to
maintain
steady
and
rapid
economic
growth
and
railway
systems
will
be
available
in
more
and
more
cities.
(用with短语改写句子并提炼要点)
→________________________________________________,
more
urban
railways
will
come
into
use.

With
the
deepening
of
the
reform
and
opening
up
policy
Step
2　妙笔成篇(适当加入一些细节或衔接词
)
The
past
few
decades
have
witnessed
the
fast
development
of
Chinese
urban
railway
system
both
in
number
and
length,
which
is
a
reflection
of
China’s
prosperous
economy.
(要点
1)
Actually,
not
only
the
growing
construction
technologies
but
also
the
expansion
of
Chinese
cities
with
booming
population
and
heavy
traffic
stimulates
the
urban
railway
construction.
(要点2)
With
the
deepening
of
the
reform
and
opening
up
policy,
more
urban
railways
will
come
into
use.
(要点3)
Thank
you