人教新目标版英语九年级全Unit 13 We're trying to save the earth!Section A 3a-3b复习课件（28张PPT）

(共28张PPT)
3a-3b
Section
A
Unit
13
We’re
trying
to
save
the
earth.
Learning
aims
1.
复习but,
so,
if,
although...
等引导的状语从句
2.
学习词汇
:
cruel
harmful
industry
law
scientific
3.
学习短语：be
harmful
to
at
the
top
of
the
food
chain
cut
off
…
1.减少空气污染
2.
代替做某事
3.木质的筷子
4.
塑料叉子
5.产生影响或作用
6.
通向一个更好的未来
cut
down
air
pollution
instead
of
doing
sth
wooden
chopsticks
plastic
forks
make
a
difference
lead
to
a
better
future
课前检测
7.骑自行车的优点
8.在…..的底部
9.参与做某事
10.扔垃圾
11.一张丑陋的图片
12.太多的垃圾
13.被严重污染
advantages
of
bike
riding
at
the
bottom
of
play
a
part
in
doing
sth
an
ugly
picture
too
much
rubbish
be
badly
polluted
throw
rubbish
be
considered
as
被看作……
consider
doing
…
考虑做某事
take
part
in…
参加….
take
an
active
part
in
积极参加活动
after-school
activity
课外活动
help
out
帮助摆脱困境
help
sb.
(to)
do
/
help
do
help
sb.
with
sth.
/help
with
with
the
help
of…
在…….的帮助下
with
one’s
help
在某人的帮助下
help
oneself
to
sth.
随便吃点什么
improve
the
invironment
改善环境
afford
to
do
承担的起，买得起……
take
action
采取行动
Take
action
and
study
hard!
take
action
to
do
采取行动做某事
save
electricity
节约电
plastic
bags
塑料袋
udd
up
合计，累计
udd
up
to
累计到……
use
public
transportation
用公共交通
paper
napkins
纸巾
recycle
paper
回收再利用纸
shark
fin
cruel
harmful
be
harmful
to
at
the
top
of
chain
the
food
chain
ecosystem
industry
law
scientific
n.
鲨鱼
n.
（鱼）鳍
adj.
残酷的；残忍的
adj.
有害的
对......有害的
在......顶部或顶端
n.
链子；链条
食物链
n.
生态系统
n.
工业；行业
n.
法律；法规
adj.
科学上的；科学的
Words
Review
What
do
you
know
about
sharks?
1.Where
do
sharks
live?
2.Are
they
very
dangerous?
3.What
do
they
eat?
4.Is
the
number
of
sharks
increasing?
5.What’s
the
most
expensive
part
of
a
shark?
Lead
in
shark
fin
shark
fin
soup
What
do
you
think
of
the
process
of
getting
shark
fin？
It’s
cruel.
finning
Also,
it
is
bad
to
the
environment
harmful
It’s
not
only
cruel,
but
also
harmful
to
the
environment.
Read
the
title,
the
first
and
last
sentences
in
each
paragraph
and
match
the
main
ideas.
While
reading
Skimming
A
Something
happens
when
people
cut
off
shark’s
fins.
B
Environmental
protection
groups
have
done
something
to
protect
sharks.
C
You’re
killing
a
whole
shark
when
you
enjoy
a
bowl
of
shark
fin
soup.
Para.
1
Para.
2
Para.
3
1.Where
is
shark
fin
soup
popular?
Para
1
It
is
especially
popular
in
southern
China.
Scanning
Q1:
What
do
people
do
to
sharks?
People______
sharks,
_______their
fins
and_____
the
shark
_________the
ocean.
as
a
result
It’s
not
only
______,
but
also_______
to
the
environment.
Without
a
fin,
a
shark
can
no
longer
_____
and
slowly______.
Q2:What
does
the
writer
think
of
people’s
behavior?
catch
throw
back
into
cut
off
swim
dies
cruel
harmful
Para
2
Sharks
are
at
the
top
of
food
chain
in
the
ocean’s
ecosystem.
If
their
numbers
drop
too
low,
it
will
bring
danger
to
all
ocean
life.
Q3:Why
does
the
writer
say
it
is
harmful
to
the
environment?
Q4:
What’s
the
situation
of
sharks
now?
why?
They’re
endangered
/
in
danger.
Because
around
70
million
sharks
are
caught
and
traded
in
this
industry
every
year
and
the
numbers
of
some
kinds
of
sharks
have
fallen
by
over
90
percent
in
the
last
20
to
30
years.
Q1:
Are
shark
fins
good
for
health?
Q2:
What
have
environmental
protection
groups
done
against
finning?
No
scientific
studies
have
shown
that
shark
fins
are
good
for
health.
They
teach
the
public
about
finning
and
have
asked
governments
to
develop
laws
to
stop
the
sales
of
shark
fins
Para
3
自主学习-再读文章，画出重点词组
Reading
up
Points
in
Para
1
Points
in
Para
2
Points
in
Para
3
1.hear
of
\
abour…
听说…
3.
cut
off
切掉4.
not
only…but
also
5.
be
harmful
to
…
对……有害
6.
no
longer
不再
7.
at
the
top
of
在…的顶部
8.
danger
n.危险---dangerous
adj.危险的
bring
danger
to
…
带给……危险
9.
in
the
last
20
to
30
years
在过去的20到30年里
（用现在完成时）
11.
develop
laws
完善法律
12.
so
far
到目前为止
（用现在完成时）
13.be
good
for对…有好处
14
科学研究
Reading
up
in
danger/out
of
danger
翻译
But
do
you
realize
that
you’re
killing
a
whole
shark
each
time
you
enjoy
a
bowl
of
shark
fin
soup？
但是当你每次享用一碗鱼翅汤的时候，你意识到你正在杀死一只整个的鲨鱼吗？
each
time
引导时间状语从句
If
their
numbers
drop
too
low,
it
will
bring
danger
to
all
ocean
life.
The
numbers
of
some
kinds
of
sharks
have
fallen
by
over
90
percent
in
the
last
20
to
30
years.
如果它们的数目降至过低，会给所有海洋生物
带来危险。
此句复数形式的numbers表达全海洋中鲨鱼的总量。当表示数值的高或低时，number要用high或low修饰。
过去20到30年间一些种类的鲨鱼的数量已经减少了90%
观察与思考：
1.When
people
catch
sharks,
they
cut
off
their
fins
and
throw
the
shark
back
into
ocean
.
2.If
their
numbers
drop
too
low,It
will
bring
danger
to
all
ocean
life.
3.
So
far,no
scientific
studies
have
shown
that
shark
fins
are
good
for
health,so
why
eat
them?
这些句子里都是有并列连词或从属连词引导的
状语从句。
3b
so
although
if
but
when
Many
people
do
not
realize
they
are
killing
a
whole
shark
______
they
enjoy
a
bowl
of
shark
fin
soup.
2.
Sharks
are
at
the
top
of
the
food
chain,
____
if
their
numbers
drop,
the
ocean’s
ecosystem
will
be
in
danger.
when
so
处于危险中
3.
Many
think
that
sharks
are
too
strong
to
be
endangered,
_____
they
are
wrong.
4.
_________
there
are
no
scientific
studies
to
support
this,
a
lot
of
people
believe
that
shark
fins
are
good
for
health.
5.
Sharks
may
disappear
one
day
___
we
do
not
do
something
to
stop
the
sale
of
shark
fins.
but
Although
if
so
although
if
but
when
Yao
Ming,
the
Chinese
basketball
star,
are
calling
on
us
to
protect
sharks.
号召
No
sale
no
killing.
Protecting
wild
animals
is
just
protecting
ourselves.
Don’t
let
our
children
can
only
see
today’s
animals
in
the
museums.
So,
let’s
remember:
完成句子
1.
----你认识皮特吗？
----不。我从来没有听说过他。
------
Do
you
know
Peter?
----No,
I
have
never
______
______
him.
2.
你吸烟会危害到你孩子的健康。
Your
smoking
can
_____
_____
_____
your
children’s
health.
3.
到目前为止，我已经交了二十个朋友。_______
_______,
I
____
______twenty
friends.
heard
of
be
harmful
to
So
far
have
made
Exercises:
4.
—Look!
_____
boys
are
playing
on
the
playground.
—Yes.
_____
them
is
about
200.
A.
The
number
of;
A
number
of
B.
The
number
of;
The
number
of
C.
A
number
of;
the
number
of
D.
A
number
of;
A
number
of
C
单词三英一汉
整理笔记
完成100页4a,4b