(共24张PPT)
Unit
3
Can
I
help
you?
Lesson
17
精通版·五年级下册
New
words
等待
拿；乘坐
年轻的
孩子（复数）
人；人们
Just
talk
Look
out!
You
mustn’t
cross
the
street
now.
You
must
wait
for
the
green
light.
You
mustn’t
spit
on
the
ground.
You
mustn’t
litter.
You
mustn’t
pick
the
flowers.
You
must
keep
off
the
grass.
You
must
take
good
care
of
young
children.
Language
points
1.
Look
out!当心！
look
out意为“当心，小心”，用于提醒别人注意某事物。其用法相当于
“Be
careful!”。
例句:
当心！你现在不能过马路。
Look
out!
You
mustn’t
cross
the
street
now.
2.You
must
wait
for
the
green
light.你必须等待绿灯。
must是情态动词，意为“必须”，语气强烈，后面跟动词原形，没有人称和数的变化，其句型结构为：主语+mustn’t+动词原形+其他.
在must后面加not变成否定式，缩略形式为mustn’t。
Just
Practise
help
old
people
keep
off
the
grass
take
good
care
of
young
children
帮助老人
不要进入草地
照看好儿童
play
on
the
street
pick
flowers
litter
在街道上玩耍
摘花
乱丢杂物
You
must
wait
for
the
green
light.
You
mustn’t
cross
the
street
when
the
light
is
red.
You
must
help
old
people.
You
mustn’t
pick
flowers.
Let’s
make
and
talk
Talk
about
your
sign.
We
must
wait.
Don’t
cross
the
street.
What
must
we
do?
Keep
off
the
grass.
Let’s
chant
ir
The
first
girl
wears
a
new
shirt.
The
second
girl
wears
a
new
skirt.
Today
is
the
first
girl’s
birthday.
She
is
as
happy
as
a
little
bird.
字母组合ir在单词中的发音规则
字母组合ir发音/??/的音。/??/是长元音,是字母组合er,
ir,
or和ur在单词中的发音。发音时舌中部比发/?/音时略高，双唇扁平。
