人教版(新课标)高中英语必修四 Unit 2 Working the land- Warming up and reading课件(15张ppt)

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名称 人教版(新课标)高中英语必修四 Unit 2 Working the land- Warming up and reading课件(15张ppt)
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科目 英语
更新时间 2021-04-28 09:40:11

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(共15张PPT)
Chemical
or
Organic
Farming?
Unit
2
Working
the
land
Have
you
ever
gone
shopping
for
vegetables?
How
do
you
deal
with
them
before
eating
them?
Why
do
you
have
to
do
so?
What
is
the
thing
he
put
on
the
soil?
fertilizer,
fertilize
the
soil(make
the
soil
fertile).
scientists
have
found
that
Why
are
chemical
fertilizers
so
popular
in
farming
today?
Over
the
past
half
century,
farmers
welcomed
them
as
a
great
way
to
stop…
…cause
damage
to
the
land
and
,
even
more
dangerous,
to
people’s
health.
Recently,
however,
present
the
serious
situation
Tip
1:
use
several
adverbs(副词)
to
make
connection
between
parts
clear
and
reasonable.
Main
idea
of
the
passage
__________fertilizers
can
cause
many
________,
so
__________
farming
is
becoming
more________.
problems
popular
Chemical
organic
Topic
Sentences
Para.1:
Para.2:
Para.3:
Para.4:
Recently,
however,
scientists
have
been
finding
that
long-term
use
of
these
fertilizers
can
cause
damage
to
the
land
and,even
more
dangerous,to
people’s
health.
What
are
some
of
the
problems
caused
by
chemical
fertilizers?
With
these
discoveries,
some
farmers
and
many
customers
are
beginning
to
turn
to
organic
farming.
Organic
farmers
also
use
many
other
methods
to
keep
the
soil
fertile.
What
are
the
problems
caused
by
chemical
fertilizers?
Problem
3
Problem
2
Problem
1
Damage
the
land
by

Harm
crops
as
well
as
animals
and
humans
Food
grow
too
fast
to
be
full
of
nutrition
first;
also;
in
addition
etc.
Tip2:
use
connectives(过渡词)
and
transitional
phrases(过渡词)
for
development
What
are
the
advantages
brought
by
organic
farming?
Advantage
1
Advantage
2
Advantage
3

focus
on
keeping
soil
rich
and
free
of
disease,
which
helps
to
reduce
disease
and
make
crops
strong
and
healthy.
Make
the
soil
richer
in
minerals
and
so
more
fertile.
keep
the
air,
soil
and
water
as
well
as
the
food
supply
free
from
chemical.
With
these
discoveries,…are
beginning
to
turn
to
organic
farming.
Definition:…farming
without
using
chemicals
Tip3:
use
advanced
phrases
to
make
the
passage
stand
out
.
What
are
the
methods
used
in
the
organic
farming?
Method
1:
Method
2
:
Method
3:
Method4:
changing
the
kind
of
crop
in
each
field
.
planting
crops
to
use
different
levels
of
soil.
planting
grass
between
crops
to
prevent

Using
natural
waste
from
animals
as
fertilizer…
The
same
goal
:
________________________
________________________________________
to
grow
good
food
and
to
avoid
damaging
the
environment
or
people’s
health.
para1
Topic
para2
Problems
of
chemical
farming
para3
Advantages
of
organic
farming
para4
Several
methods
pro.1
pro.2
pro.3
illustration(阐述)
comparison
(对比)
met.1
met.2&eg
met.3
&eg
The
type
of
the
article
is__________________
exposition(说明文)
adv.1
adv.2
adv.3
conclusion
(总结)
met.4
Rewrite
the
topic
sentences
Para.1:
Para.2:
Para.3:
Para.4:
Recently,
however,
scientists
have
been
finding
that
long-term
use
of
these
fertilizers
can
the
land
and,even
more
dangerous,to
people’s
health.
What
are
some
of
the
problems
caused
by
chemical
fertilizers?
With
,
are
beginning
to
Organic
farmers
also
use
to
cause
damage
to
There
several
.
同义替换
问句变称述
找出关键词,重塑句意
these
discoveries
some
farmers
and
many
customers
turn
to
organic
farming.
Some
farmers
and
many
customers
prefer
organic
farming
because
of
these
discoveries
now.
many
other
methods
keep
the
soil
fertile
Many
organic
farming
methods
are
used
to
fertilize
the
land.
主动变被动
have
discovered
using
chemical
fertilizers
for
a
long
time
hurt
also
In
recent
days,
scientists
have
discovered
that
using
chemical
fertilizers
for
a
long
time
can
hurt
the
land
and
also
people’s
health.
There
are
several
problems
caused
by
chemical
fertilizers.
Some
farmers
and
many
customers
prefer
organic
farming
because
of
these
discoveries
now.
Many
organic
farming
methods
are
used
to
fertilize
the
land.
What
are
the
problems?
What
is
organic
farming?
What
do
the
methods
bring
to
people?
C:
Organic
farming
does
not
use
any
chemicals.
B:
All
of
these
methods
try
to
produce
good
food
and
to
keep
the
environment
and
people
healthy.
In
recent
days,
scientists
have
discovered
that
using
chemical
fertilizers
for
a
long
time
can
hurt
the
land
and
also
people’s
health.
There
are
several
problems
caused
by
chemical
fertilizers.____.
______
some
farmers
and
many
customers
prefer
organic
farming
because
of
these
discoveries
now.
_________.
Many
organic
farming
methods
are
used
to
fertilize
the
land._______.
A
:
They
hurt
the
health
of
the
land,
stay
in
the
water
for
a
long
time
and
get
into
people’s
bodies
through
their
food.
D:
Therefore
A
D
C
B
回视语篇,使之衔接自然,行文流畅
Summary
In
recent
days,
scientists
have
discovered
that
using
chemical
fertilizers
for
a
long
time
can
hurt
the
land
and
also
people’s
health.
There
are
several
problems
caused
by
chemical
fertilizers.
They
hurt
the
health
of
the
land,
stay
in
the
water
for
a
long
time
and
get
into
people’s
bodies
through
their
food.
Therefore
some
farmers
and
many
customers
prefer
organic
farming
because
of
these
discoveries.
Organic
farming
does
not
use
any
chemicals.
Many
organic
farming
methods
are
used
to
fertilize
the
land.
All
of
these
methods
try
to
produce
good
food
and
to
keep
the
environment
and
people
healthy.
Listen
to
paragraph
2
and
3
and
recite
one
or
both
of
them.
(optional)
Low
requirement:
para.
2
High
requirement:
para.
3