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Unit
3
Computers
导学案
【学习目标】
1.学习形容词比较级的构成方式
2.能运用形容词比较级简单描述事物
【重难点预测】
重点:学习形容词比较级的构成方式
难点:运用形容词比较级简单描述事物
【学习流程】
1.填空,完成下面的短文。
The
first
computers
were_______
(big)
than
cars,
but
now
they
are
becoming
_________
(small)
and
________
(good).21世纪教育网版权所有
Computers
can
calculate
at
a
________
(fast)
speed
than
we
can.
Computers
are
not
________
(clever)
than
human
beings,
but
they
may
be
able
to
do
a
_________
(good)
job
than
us.21教育网
In
the
past,
computers
were________
(much)
expensive,
but
now
they
are
much
______
(cheap).21cnjy.com
Ⅱ、自主探究
完成教材P39Work
out
the
rule部分的内容,并总结形容词比较级的构成方式
比较级形式
例词
单音节形容词
大多数单音节形容词
+-er
high—highersmall—smaller
以-e结尾
+-r
large—largerwide—wider
一个元音+一个辅音
双写辅音字母,再加-er
big—biggerhot—hotter
双音节形容词
以-y或-ly结尾
把y改为i再加er
happy—happiersilly—sillier
以非重读元音/l/或// (r)/结尾
+-er(-r)
clever—cleverersimple—simpler
以-ful,-less,-ed,-ing结尾
more+形容词原级
careful—more
carefulboring—more
boring
多音节形容词
含三个或三个以上
more+形容词原级
difficult—
more
difficultbeautiful—more
beautiful
Ⅲ、合作交流
模仿所给例子,运用比较级进行对话
Canada,China(country/big)
e.g.S1:
Which
country
is
bigger,
Canada
or
China
S2:
Canada
is
bigger
than
China.
Ⅳ、总结反思收获
策略与反思
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