(共22张PPT)
Unit
2
Saving
the
Earth
Topic
2
All
these
problems
are
very
serious
Section
A
Watch
the
video,
and
answer:
Which
disaster
can
you
see
in
the
video?
Sandstorm.
（沙尘暴）
Do
you
know
how
sandstorms
come
into
being?
Lead
in
many
trees
cut
down
Pre-listening
Human
beings
have
cut
down
many
trees.
forests
gone
wash
the
earth
away
冲走
The
forests
have
gone
and
the
rain
washes
the
earth
away.
change
into
desert
转换成，变成
沙漠
e.g.
A
lot
of
rich
land
has
changed
into
desert
because
people
have
cut
down
too
many
trees.
sandstorms
As
a
result,
sandstorms
come
into
being.
3
Do
you
know
how
sandstorms
come
into
being?
Number
the
pictures
and
talk
about
the
sandstorm
in
groups.
(
)
(
)
(
)
(
)
(
)
(
)
4
1
5
3
6
2
wash
the
earth
away
many
trees
change
into
desert
forests
gone
sandstorms
come
into
being
cut
down
trees
Do
you
know
what
things
can
stop
the
sandstorm?
Trees.
The
boy
and
girls
are
talking
about
.
different
types
of
sandstorms
the
reasons
for
sandstorms
sandstorms
in
different
cities
1b
Listen
to
1a
and
choose
the
best
answer.
Focus
on
the
main
idea
of
the
conversation
when
you
listen
for
the
first
time.
√
While-listening
Task
1
Listen
and
answer
the
questions
1.What’s
the
weather
like
today
?
It’s
bad.
The
wind
is
so
strong
.
And
the
sand
really
hurts
face.
2.What
causes
these
sandstorms
?
People
have
cut
down
too
many
trees.
As
a
result,
a
lot
of
rich
land
has
changed
into
desert.
n.沙
Task
2
1c
Read
1a
and
complete
trees’
functions.
A.
Trees
can
stop
the
wind
from
blowing
the
earth
away.
B.
A
lot
of
water
can
be
saved
by
forests.
C.
They
can
also
stop
the
water
from
washing
the
earth
away.
Tree’s
functions
Task
3
K:
wind;
sand;
anything
M:
sandstorms
J:
cut
down;
as
a
result;
change
into
M:
affect
J:
stop…from…;
blow…
away
K:
can
be
saved
J:
wash
…
away
K:
is
harmful
to;
although;
do
something
Act
out
the
dialog
in
pairs
Post-listening
Key
sentences
and
phrases
1.
What
bad
weather!
多么糟糕的天气啊！
2.
What
causes
these
sandstorms?
是什么引起这些沙尘暴的呢？
3.
As
a
result,
a
lot
of
rich
land
changed
into
desert.
结果，大量肥沃的土地变成了荒漠。
4.
How
can
that
affect
the
weather?
那是如何影响天气的呢？
5.
stop…from
doing
sth.
阻止……做某事
6.
although：尽管，引导让步状语从句
7.
do
something
to…
做一些事情去……
something
somebody,
someone,
something,
somewhere
anybody,
anyone,
anything,
anywhere
none,
nobody,
nothing,
nowhere
everybody,
everyone,
everything,
everywhere
一般情况下用于肯定句
一般情况下用于否定句和疑问句
表否定含义
可用于各种句式
the
indefinite
pronoun
and
adverb
1.I
have
____
to
tell
you.
A.
important
something
B.
something
important
B
形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后
Do
you
know?
2.Everybody
___
ready
for
the
match.
A.
is
B.
are
A
不定代词作主语时，谓语动词要用单数。
Lily,
would
you
like
___________
to
drink?
Cindy
is
very
busy
now.
She
needs
_______
to
help
her.
Is
there
_________
wrong
with
your
computer?
Jim
looked
for
his
pencil-box
____________
,
but
he
didn’t
find
it.
I
stayed
at
home
last
week.
I
didn’t
go
__________.
Use
someone,
something,
anything,
anywhere,
everywhere
to
fill
in
the
blanks.
something
someone
anything
everywhere
anywhere
Exercises
2
Complete
the
sentences
with
the
correct
forms
of
the
given
phrases
in
the
box.
as
a
result,
change
into,
do
something,
stop…from,
blow…away
1.People
have
cut
down
such
a
large
number
of
trees
that
the
land
_____________________desert.
2.There
are
fewer
trees
left,
so
the
wind
always
_______
the
earth
________.
3.Air
pollution
has
become
a
serious
problem,
so
we
must
______________
to
reduce
it.
4.we
should
try
our
best
to
_________
people
________
cutting
down
the
trees.
5.In
the
future,
human
beings
can
protect
the
trees
well.
_____________,
animals
will
live
a
happy
life
in
the
forest.
has
changed
into
blows
away
do
something
stop
from
As
a
result
become
weaker
destroy
the
environment
disappear
rapidly
on
the
earth
enough
bamboo
to
eat
Because
of
destroying
the
environment,
the
animals
are
dying
out.
Now
let's
listen
to
the
passage
and
circle
the
phrases
you
hear.
Finish
4A.
4
B.
Listen
again
and
fill
in
the
blanks.
1.
Now
some
kinds
of
animals
are
becoming
______
______
_______.
2.
Some
animals
are_____
______
____dying
out
completely.
3.
In
the
past,
pandas
lived
a
quiet
life
and
had
________
______food.
4.
Humans
have
_____
_____
____________
the
importance
of
protecting
animals.
5.
We
should
______
______
____to
protect
them.
do
our
best
in
danger
of
plenty
of
come
to
understand
fewer
and
fewer
We
learn:
1.Some
words:
sand,
although,
sandstorm,
desert,
reduce,
completely
2.Some
phrases:
change
into,
human
being
3.Some
sentences:
(1)As
a
result,
a
lot
of
rich
land
has
changed
into
desert.
(2)Trees
can
stop
the
wind
from
blowing
the
earth
away.
We
can:
1.
Use
the
indefinite
pronoun
and
adverb.
2.Talk
about
the
sandstorm
and
its
harm.
Summary
Homework
2.
复习重点句子和词组以及语法：不定代词和不定副词。。
1.
复习Section
A。
3.
完成练习册Section
A。
4.
预习Section
B。
Section
A
复习重点
1.
What
bad
weather!
多么糟糕的天气啊！
2.
What
causes
these
sandstorms?
是什么引起这些沙尘暴的呢？
3.
As
a
result,
a
lot
of
rich
land
changed
into
desert.
结果，大量肥沃的土地变成了荒漠。
4.
How
can
that
affect
the
weather?
那是如何影响天气的呢？
5.
stop…from
doing
sth.
阻止……做某事
6.
although：尽管，引导让步状语从句
7.
do
something
to…
做一些事情去……
