人教新课标高中英语必修四Unit 2 Working the land Warming Up 课件 （23张ppt）

(共23张PPT)
一、学习目标：
1）能正确朗读、拼写本单元所有单词、短语
2）熟悉本单元单词的词形变化
二、学习重点：
制作本单元话题词汇的思维导图(mind-map)
学习难点：
利用本单元话题词汇用英语说说农民如何耕作
【预学案】
Work
in
groups
to
find
out
as
much
vocabulary
about“Working
the
land”as
possible
Steps
of
farming（耕作过程）：
犁地
播种
灌溉
农产品
Ways
of
farming（耕作方式）：
化学耕作
有机耕作
ploughing
(犁田)
seeding
irrigating
灌溉
fertilizing
(施肥)
Natural
waste
harvesting
Do
you
know
these
products?
wheat
rice
sorghum
高粱
corn
cotton
peanut
soybean
大豆
【课堂检测】
Work
in
groups
and
fill
in
the
mind-map
with
proper
words
Working
the
land
Steps
of
farming
Ways
of
farming
product
soil
Working
the
land
Steps
of
farming
Ways
of
farming
product
soil
circulate
ploughing
seeding
irrigation
rice
wheat
bean
soybean
sorghum
peanut
corn
chemical
organic
weed
pest
bacterium
mineral
nutrition
fertilizer
natural
waste
【当堂训练】
Work
in
groups
and
find
out
as
many
derivatives
（派生词）of
some
words
in
the
mind-map
as
possible.
ploughing
n.
耕作，耕翻
plough
n.
犁
vi.用犁耕地
Working
the
land
Steps
of
farming
Ways
of
farming
product
soil
circulate
ploughing
seeding
irrigation
rice
wheat
bean
soybean
sorghum
peanut
corn
chemical
organic
weed
pest
bacterium
mineral
nutrition
fertilizer
natural
waste
Working
the
land
Steps
of
farming
Ways
of
farming
product
soil
circulate
ploughing
seeding
irrigation
rice
wheat
bean
soybean
sorghum
peanut
corn
chemical
organic
weed
pest
bacterium
mineral
nutrition
fertilizer
natural
waste
plough
n.
犁
vi.用犁耕地
seed
n.
种子vt.
播种
irrigate
vt.
灌溉
produce
n.农产品vt.生产
production
n.
生产
circulation
n.循环、传播
chemistry
n.
化学
chemist
n.
化学家
organ
n.器官
fertilize
vt.使肥沃
fertile
a.肥沃的
mine
n.矿
vi.开矿
miner
n.矿工
nutrient
n.营养物a.营养的
【课堂研讨】
Work
in
groups
and
tell
in
class:
how
farmers
work
the
land.
You
can
use
the
mind-map
to
help
you.
How
farmers
work
the
land
Farmers
will
take
the
following
steps
to
work
the
land.
First,
plough.
Second,
seed.
Third,
irrigate.
Finally,
harvest.
They
will
harvest
a
lot
of
products,
such
as
rice,
wheat,
sorghum,
soybean,
peanut,
corn
and
so
on.
There
are
two
ways
of
farming.
One
is
chemical
farming
and
the
other
is
organic
farming.
By
chemical
farming,
farmers
use
fertilizers
to
get
rid
of
pests,
weeds
and
bacterium.
By
organic
farming,
farmers
use
natural
waste.
In
this
way,
minerals
and
nutrition
are
brought
back
to
soil.
As
a
result,
soil
can
be
circulated
and
farmers
can
work
the
land
again
and
again.
【课后拓展】课后作业1