Unit 4 Don't eat in class. Section A (Grammar Focus-3c) 课件共36张PPT

(共36张PPT)
Unit
Don't
eat
in
class.
Period
3
Section
A
(Grammar
Focus-3c)
人教版
七年级下
To
learn
Imperatives
Don’t…:
Don’t
run
in
the
hallways.
To
learn
to
use
can
for
permission:
Can
we
eat
in
the
classroom?
To
learn
to
use
modal
verbs
have
to
&
must:
We
have
to
be
quiet
in
the
library.
We
must
be
on
time
for
class.
1.
不要在楼道里跑。
_______________________
2.
不要打架。
_______________
3.
有什么规矩？
__________________________
4.
我们必须按时上课。
__________________________
Don’t
fight.
Don’t
run
in
the
hallways.
What
are
the
rules?
We
must
be
on
time
for
class.
Grammar
Focus
5.
我们可以在教室里吃东西吗？
_____________________________
6.
不能。但我们可以在餐厅里吃东西。
______________________________
______________________________
7.
我们可以在上课的时候带帽子吗？
___________________________
Can
we
wear
a
hat
in
class?
No,
we
can’t,
but
we
can
eat
in
the
dining
hall.
Can
we
eat
in
the
classroom?
8.
他在学校里必须穿校服吗？
_________________________________
9.
是的，必须。/
不，不必。
_______________________________
10.
你们必须做什么？
_______________________________
11.
在图书馆里我们必须保持安静。
________________________________
Yes,
he
does.
/
No,
he
doesn’t.
Does
he
have
to
wear
a
uniform
at
school?
What
do
you
have
to
do?
We
have
to
be
quiet
in
the
library.
Observe
and
learn.
Don’t
eat
in
the
classroom.
Don’t
fight.
Don’t
run
in
the
hallways.
Don’t
arrive
late
for
class.
Don’t
listen
to
music
in
class.
Have
a
think:
祈使句是怎样构成的？
一般在什么情况下会用祈使句？
Don’t
…
不要做……
祈使句一般用来表示请求、命令、劝说、号召、警告等。
在祈使句中,
通常省略第二人称主语you。肯定式以动词原形开头，否定式一般在动词原形前加don’t。
祈使句
一、祈使句的肯定式
1.
以行为动词原形开头，简称Do型。
e.g.
Come
here.
到这儿来。
2.
以动词be开头，简称Be型。
e.g.
Be
quiet,
please.
请安静。
3.
以Let开头，简称Let型。
e.g.
Let’s
go!
咱们走吧!
注意：
有时可在祈使句的句首或句尾加上please，使语气显得客气、有礼貌。如果在句尾加please，应该用逗号与前句隔开。
e.g.
Go
this
way,
please.
请这边走。
二、祈使句的否定式
1.
Do型和Be型的否定式是在句首加don’t。
e.g.
Don’t
sit
here.
不要坐在这儿。
Don’t
be
late.
别迟到。
2.
以let开头的祈使句，其否定式有两种：
一种是直接在句首加don’t，另一种是
“let
+宾语+not
+动词原形+
(其他)”。
e.g.
Don’t
let
him
go.
不要让他走。
Let’s
not
go
there.
咱们别去那儿。
注意：
“No+名词/动词?ing形式”表示禁止或规劝，常用于公共场所。
e.g.
No
photos!
禁止拍照！
No
smoking！??????
禁止吸烟！
【运用】汉译英。
1.?请看图片，Jim！
2.?不要在晚饭后吃冰激凌。
3.?在图书馆里请保持安静。
Be
good
to
friends.
Let
me
help
you.
Don’t
fight
with
your
friend(s).
4.?对朋友们要好。
5.?让我帮助你。
6.?不要和你的朋友打架。
Be
good
to
friends.
Let
me
help
you.
Don’t
fight
with
your
friend(s).
Observe
and
learn
Have
a
think:
1.
情态动词在用法上有什么共同点？
2.
can在本单元主要表示什么含义？它还可表达什么意思？
3.
have
to在用法上与其他情态动词有何区别？
情态动词can,
must,
have
to
后面都接动词原形
本单元can意为“可以”，表示请求、允许。如:
I?can?dance?and?sing.
2)
can还可表示能力,
“能，会”。如:
--
Can?the?students?run?in?the?hallways??
--
Yes,
they
can./No,
they
can’t.
We
can’t
eat
in
the
classroom.?
情态动词can
肯定句:
主语+can+动词原形+其他.
否定句：
主语+can
not/can’t+动词原形+其他.
疑问句:
Can+主语+动词原形+其他?
肯定回答：Yes,
主语+can.
否定回答：No,
主语+can’t.
情态动词can的句型结构:
情态动词must表说话人的主观看法，表示必须、必要。无人称和数的变化
，不能单独使用，必须与其后的动词原形构成谓语。
句型结构：主语+must+动词原形+其他.
如:
You
must
come
in
time.
你必须按时来。
The
children
must
be
back
before
6
o’clock.
孩子们必须6点前回来。
情态动词must
have
to
表示必须,
强调客观需要,
有不得不、被逼无奈做某事的意思。
此词既有人称、单复数的变化,
也有动词时态的变化。
其否定形式和疑问句形式均需要借助助动词do才可以进行变化。
情态动词
have
to
have
to的句型结构:
肯定句：
主语＋have/has/had?to＋V原形＋其他.
否定句：
主语+don’t/doesn’t/didn’t?have?to＋V原形＋其他.
疑问句:
Do/Does/Did＋主语＋have?to＋V原形＋其他?
如:
She
has
to
look
after
her
mother
at
home.
We
don’t
have
to
clean
the
room
today.
--Does
he
have
to
go
to
bed
now?
--Yes,
he
does./
/No,
he
doesn’t
.
Library
Rules
Don’t
talk.
________________
________________
________________
Write
the
rules
for
the
school
library.
Don’t
listen
to
music.
Don’t
eat
or
drink.
Don’t
take
photos.
3a
Be
quiet?
(she/have
to
/in
the
library)
Q:
Does
she
have
to
be
quiet
in
the
library?
A:
Yes,
she
does.
Use
the
words
to
make
questions
about
the
rules.
Then
write
answers
according
to
your
school.
3b
2.
Eat?
(he/have
to/in
the
dining
hall)
Q:
________________________________?
A:
_____________
3.
Listen
to
music?
(we/can/in
the
hallways)
Q:
________________________________?
A:
_____________
4.
Wear
a
hat?
(we/can/in
the
classroom)
Q:
_____________________________?
A:
____________
Yes,
he
does.
Does
he
have
to
eat
in
the
dining
hall
Can
we
listen
to
music
in
the
hallways
No,
we
can’t.
Can
we
wear
a
hat
in
the
classroom
No,
we
can’t.
At
my
dream
school,
we
don’t
have
to
come
to
school
every
day…
We
can
eat
in
class…
Make
up
five
cool
rules
for
your
dream
school.
Share
your
rules
with
the
class.
Your
classmates
vote
for
the
Coolest
School!
3c
We
don’t
have
to
wear
school
uniforms…
We
don’t
have
to
do
homework
every
day…
Discuss
and
make
rules
for
the
computer
room
in
your
school.
Computer
Room
Rules
_______________
_______________
_______________
________________
________________
We
must
be
quiet
in
the
computer
room.
Don’t
run
in
the
computer
room.
Don’t
eat
or
drink
in
the
computer
room.
Wear
slippers
in
the
computer
room.
Computer
Room
Rules
___________________________________
___________________________________
___________________________________
___________________________________
___________________________________
We
must
be
quiet
in
the
computer
room.
Don’t
eat
or
drink
in
the
computer
room.
Don’t
run
in
the
computer
room.
Wear
slippers
in
the
computer
room.
Clean
the
computer
room
every
day.
(be)
on
time?准时,
listen
to
music?听音乐
in
the
hallways?在走廊里
in
the
dining
hall?在餐厅里
in
class?上课；听课；在课堂上
a
lot
of?许多；大量,
have
to?必须；不得不
music
players?音乐播放器
wear
the
school
uniform?穿校服
dream
school?梦想中的学校
Be
quiet.?安静。
Don’t
be
late
for
class.?上课不许迟到。
Ⅰ.?根据语境从方框中选择恰当的单词填空。
1.
I
like
Lucy.
She
is
a(n)
_________
girl.?
2.
It’s
very
_________
for
all
of
us
to
be
healthy.
3.
Tina
is
_________.
Please
ask
her
to
come
in.
4.
Jackie
_________
a
white
T-shirt.
He
looks
very
cool.
5.
—Tony,
please
_________
your
violin
to
school
this
afternoon.
—OK,
I
will.
quiet
outside,
wear,
important,
bring,
quiet
important
outside
wears
bring
Ⅱ.?根据句意及提示完成下列句子。
1.
In?Beijing,
Mr.
Green
has
____________
(许多)
friends.
2.
Where’s
my
_____________
(校服),
Mom?
3.
Don’t
______________
(迟到)
class,
Jane.
4.
In
Bob’s
room
I
see
some
new
____________
(音乐播放器).
5.
Jack
____________
(不得不)
clean
his
room
every
day.
a
lot
of/many
school
uniform
be/arrive
late
for
music
players
has
to
Ⅲ.?完成英语句子，每空一词(含缩略形式)。
1.?玛丽不得不在学校吃午饭吗？
________
Mary
________
_________
eat
lunch
at
school???
2.?我们在课堂上必须讲英语。
We
________
_________
English
in
class.
3.?他们现在可以在教室里读书吗？
________
they
________
in
the
classroom
now???
Does
have
to
must
speak
Can
read
4.?早餐不要吃鸡肉汉堡。
_________
________
the
chicken
hamburger
for
breakfast.?
5.?亨利睡前不得不做什么呢？
_________
_________
Henry
_________
_________
_________
before
sleep?
Don’t
eat/have
What
does
have
to
do
Ⅳ.?根据短文用所给词的适当形式填空。
Dear
Mary,
Now
I’m
at
Bill’s
home.
Please
(1)_______
(help)
me
do
some
things.
First,
(2)________
(get)
some
food
for
my
dog
Robot.
After
Robot
finishes
eating
his
food,
you
can
(3)________
(clean)
his
small
room.
Then,
(4)________
(take)
him
for
a
walk.
(5)________
(not
let)
him
be
with
Mom’s
dog
Frank.
They
will
fight.
Many
thanks.
????????????????????????????????????????????????????????
Your
sister
?????????????????????????????????????????????????????????
Mona
help
get
clean
take
Don’t
let
1.
Remember
the
sentences
in
the
Grammar
Focus.
2.
Write
five
rules
in
your
family.
3.
Preview
the
new
words
and
expressions.
Homework
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