(共47张PPT)
新目标(Go for it)版七年级下册
SectionA(Grammar Focus-3c)
Unit 4 Don't eat in class.
Warming up
Watch a video and learn some school rules.
Let’s think and talk.
_____ we arrive late for class
No, we ____ . We ____ be on time.
_____ arrive late for class.
Can
Don’t
can’t
must
Can
Don’t
can’t
must
Revision
_____ we run in the hallways
No, we _____ . We _____ walk .
_____ run in the hallways.
Can
Don’t
can’t
must
Can
Don’t
can’t
must
Let’s think and talk.
Revision
_____ we listen to music in class
No, we _____ . We _____ listen to our teacher.
_____ listen to music in class.
Can
Don’t
can’t
must
Can
Don’t
can’t
must
Let’s think and talk.
Revision
_____ we fight
No, we _____ . We _____ be friendly to each other.
_____ fight .
Can
Don’t
can’t
must
Can
Don’t
can’t
must
Let’s think and talk.
Revision
_____ we sleep in class
No, we _____ . We _____ listen to the teacher carefully.
_____ sleep in class.
Can
Don’t
can’t
must
Can
Don’t
can’t
must
Let’s think and talk.
Revision
_____ _____ _____ in class
No, _____ _____ . _____ _____ _____ in the dining hall.
_____ _____ in class.
Can
Don’t
can’t
must
Can
Don’t
you
must
we
eat
can’t
You
eat
eat
Let’s think and talk.
Revision
When we walk around the school, we may find rules everywhere. Rules can help us get along and stay safe. Discuss with your partner: Where can we see rules at school
in the classroom
in the library
in the hallway
in the lab
Follow me!
Let’s look at the rules in different places at school!
Lead in
Hallway Rules
1. _____________
_____________
2. _____________
_____________
3. _____________
_____________
4. _____________
_____________
Don’t push.
No pushing.
1
2
3
4
Don’t shout.
No shouting.
Don’t run.
Don’t litter.
No littering.
No running.
Here, we’re in the hallway.
Look at the rules, can you tell what they are
Presentation
We are now in the classroom.
Tell your partner the class rules.
Class Rules
1. _________________
_________________
2. _________________
_________________
3. _________________
4. _________________
Don’t be late.
Be on time.
Don’t use cell phone.
No cell phone.
Don’t sleep in class.
Don’t throw paper.
Presentation
What do these sentences have in common
Don’t push.
Be on time.
Don’t shout.
Don’t run.
Don’t litter.
No cell phone.
Don’t sleep in class.
Don’t throw paper.
缺 少 主 语
表示命令、请求、劝告、警告和禁止等的句子。
祈使句
imperative sentence
Summary
祈使句歌诀
祈使句，祈使句，请求、命令或建议。
主语是______常省去，_________开头记。
否定形式要注意，______放到句首去。
要讲客气用______，句首、句末没关系。
No doing! 需提起，表示________不小觑。
you
动词原形
Don’t
please
“禁止”
Pre-grammar
Read the following sentences and find out the the grammar.
Don’t run in the hallways. Don’t fight.
What are the rules We must be on time for class.
Can we eat in the classroom No, we can’t, but we can eat in the dining hall.
Can we wear a hat in class Yes, we can./No, we can’t.
Does he have to wear a uniform at school Yes, he does./No, he doesn’t.
What do you have to do We have to be quiet in the library.
1：祈使句的否定句怎样构成？肯定句呢？一般在什么情况下会用祈使句？
2：情态动词在用法上有什么共同点？
3：can在本单元主要表示什么含义？它还可表达什么意思？
4：have to在句法上与其他情态动词有何区别？
Grammar Focus
Try to find out the rules.
祈使句的否定句怎样构成？肯定句呢？
祈使句的否定句在动词原形前加don’t，表示“不要做什么事”。
Don’t run in the hallways. Don’t fight.
What are the rules We must be on time for class.
Can we eat in the classroom No, we can’t, but we can eat in
the dining hall.
Can we wear a hat in class Yes, we can./No, we can’t.
Does he have to wear a uniform at school Yes, he does./No, he doesn’t.
What do you have to do We have to be quiet in the library.
祈使句的肯定句通常是以动词原形开头的。
Grammar Focus
一般在什么情况下会用祈使句？
祈使句一般用于上级对下级，长辈对晚辈之间，表示命令、劝说或警告，也可表示请求。
Don’t run in the hallways. Don’t fight.
What are the rules We must be on time for class.
Can we eat in the classroom No, we can’t, but we can eat in
the dining hall.
Can we wear a hat in class Yes, we can./No, we can’t.
Does he have to wear a uniform at school Yes, he does./No, he doesn’t.
What do you have to do We have to be quiet in the library.
Try to find out the rules.
Grammar Focus
情态动词在用法上有什么共同点？
can, must, have to后接动词原形。
Don’t run in the hallways. Don’t fight.
What are the rules We must be on time for class.
Can we eat in the classroom No, we can’t, but we can eat in
the dining hall.
Can we wear a hat in class Yes, we can./No, we can’t.
Does he have to wear a uniform at school Yes, he does./No, he doesn’t.
What do you have to do We have to be quiet in the library.
Try to find out the rules.
Grammar Focus
have to在句法上与其他情态动词有何区别？
have to有人称和数的变化。
Don’t run in the hallways. Don’t fight.
What are the rules We must be on time for class.
Can we eat in the classroom No, we can’t, but we can eat in
the dining hall.
Can we wear a hat in class Yes, we can./No, we can’t.
Does he have to wear a uniform at school Yes, he does./No, he doesn’t.
What do you have to do We have to be quiet in the library.
Try to find out the rules.
Grammar Focus
祈使句的用法
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，通常省略主语you，其肯定形式以动词原形开头，否定形式是在动词原形前加don’t。祈使句句尾用句号或感叹号，读时用降调。为表示礼貌，可以在句首或句尾加上please。句末用please时，前面通常加逗号。
语法概述
Language Points
肯定句：__________ (+宾语)+其他.
否定句：______+动词原形 (+宾语) +其他.
Do 型祈使句的构成
如：上学日请穿校服。
Wear the school uniform on weekdays, please.
Don’t watch TV before dinner.
晚饭前不要看电视。
动词原形
Don’t
Language Points
Be 型祈使句的构成
肯定句：____+表语+其他.
否定句：______+be+表语 +其他.
如：下次要细心。
Be careful next time.
上学不要迟到!
Don’t be late for school!
Be
Don’t
Language Points
Let 型祈使句的构成
肯定句：_____+宾语+_________+其他.
否定句：______+let+宾语+动词原形+其他.
或Let+宾语+______+动词原形+其他.
如：咱们休息一下吧。
Let’s have a rest.
不要让他去游泳。
Don’t let him go swimming.
=Let him not go swimming.
Let
动词原形
Don’t
not
Language Points
其他类型的否定祈使句
(1) No+v-ing! / No+名词!
禁止钓鱼!
禁止停车!
如：禁止拍照!
No fishing!
No parking!
No photos!
如：决不放弃!
Never give up!
(2) never 代替don’t 来加强语气。
Language Points
祈使句的形式
1.肯定祈使句的形式
类型 结构 例句
Do型 吃东西在餐厅。
Be型 请保持安静！
Let型 让我来帮你。
动词原形(＋宾语)＋其他.
Eat in the dinning hall.
Be＋表语(形容词)＋其他.
Be quiet,please!
Let＋宾语＋动词原形＋其他.
Let me help you.
Language Points
2.否定祈使句的形式
类型 结构 例句
Do型 在句首加_______ 不要忘记我！
Be型 不要迟到！
Let型 别让他走。
No型 禁止垂钓！
Don't
Don't forget me!
Don't be late!
Don't＋let＋宾语＋动词原形＋其他.
Let＋宾语＋not＋动词原形＋其他.
Don't let him go.
Let him not go.
No+ 名词/doing！
No fishing!
Language Points
祈使句的形式
情态动词have to
1. 肯定句：主语+__________+___________.
2. 否定句：主语+ _____________ have to+__________.
3. 一般疑问句：_______+ 主语+ have to+__________
Yes, 主语+_________./No, 主语+____________.
do/does
don’t/doesn’t
have/has to
动词原形
动词原形
动词原形
Do/Does
don’t/doesn’t
如：What do you have to do
We have to be quiet in the library.
Do you have to be quiet in the library
Yes, we do. / No.we don’t.
如：What does she have to wear at school
She has to wear a school uniform at school
Does she have to wear a uniform at school
Yes, she does. /No,she doesn’t.
Language Points
情态动词have to与must
二者均可表示“必须”，其后均接动词原形。
如：太晚了，我必须乘出租车。
It’s too late. I have to take a taxi.
I must go now.
我必须现在就走。
Language Points
3.辨析have to与must
词语 意思 相同 例句
have to 第三人称单数_______ ,疑问句或否定句要借助________,否定形式表示________ 因为他的自行车坏了,他不得不步行去上学。
must 情态动词,否定句mustn’t意为_______,否定回答可以用_______或_________ 我们必须努力学习。
我必须打扫所有的房间吗？
(否定回答)
不得不
后跟动词原形
has to
do;does
“不必”
He has to walk to school because his bike is broken.
必须
“禁止”
needn’t
don’t have to
We must study hard.
No, you needn’t/don’t have to.
Language Points
3a
Look at the pictures in 3a and answer the questions.
1
2
3
4
1. What do the pictures tell us
2. Where can you see these signs
3. Can we talk loudly/eat/listen to
music/take photos in the library
Practice
3a
Write the rules for the school library.
1
2
3
4
Library Rules
1. ____________________________
2. ____________________________
3. ____________________________
4. ____________________________
Don’t talk.
Don’t eat in the library.
Don’t listen to music in the library.
Don’t take photos in the library.
Practice
3b
Use the words to make questions about the rules. Then write answers according to your school.
1. Be quite
Q: Does she have to be quite in the library
(she/have to/in the library)
A: Yes, she does.
2. Eat
Q: ________________________________
(he/ have to/ in the dining hall)
A: ________________________
Does he have to eat in the dining hall
Yes, he does.
Practice
3. Listen to music
Q: ________________________________
(we/ can/ in the hallways)
A: ________________
4. Wear a hat
Q: _______________________________
(we/ can/ in the classroom)
A: _______________
Can we listen to music in the hallways
Can we wear a hat in the classroom
No, we can’t.
No, we can’t.
Practice
Complete the sentences with can, can’t, must, have to or has to.
1. Ann ______ do her homework, so she goes to ask her teacher for help.
2. You don’t ______ clean your room today. You can do it tomorrow.
3. — ______ Jim speak English
— No, he can’t.
4. — ______ I wear my school uniform
— Yes, you must.
5. — What do students _________ in library
— They ______ keep quiet.
can’t
have to
Can
Must
have to do
have to
Practice
Use can, can’t have to / must and don’t to talk about the rules at school.
( ) do homework in the classroom
( ) play computer games every day
( ) listen to the teachers in class (在课堂上)
( ) run in the hallways
( ) read English books in English class
Can
Don’t
can’t
must
Practice
( ) wear hats (戴帽子) in class
( ) listen to music in the classroom
( ) eat in class
( ) fight
( ) eat in the dining hall
Can
Don’t
can’t
must
Practice
Use can, can’t have to / must and don’t to talk about the rules at school.
Use can, can’t have to / must and don’t to write about the rules at school. Write two sentences for each rule.
1. arrive late / class ________________________________________
2. listen/ teacher __________________________________________
3. be noisy / library ________________________________________
4. speak English / English class
_______________________________________________________
5. eat / dining hall _________________________________________
Don’t arrive late for class. We can’t arrive late for class.
Listen to teacher. We must listen to teacher.
Don’t be noisy in the library. We can’t be noisy in the library.
Speak English in English class . We must speak English in English class.
Eat in the dining hall . We can eat in the dining hall .
Practice
wear a hat
Listen to music
Eat
Do we have any library rules in our school Ask and answer in pairs.
Do you have to... in the library
Yes,.../No,...
Be quiet
Practice
the students/have to/clean classroom/every day
she/have to/be at home/at five o’clock
she/have to/do morning reading/every day
we/can/arrive at school/late
Make more conversations using these words.
Practice
3c
Make up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!
1.We can eat in class.
2.We don’t have to come to school every day.
3. ...
At my dream
school, we don’t have
to come to school
every day. We...
Practice
Report to the class. (汇报)
In my dream school, we don't have to come to school every day. We can study at home and ask the teacher for help when we have questions. We can eat in the classroom but we must keep the classroom clean. We can listen to music in the classroom but we must listen to it after class. We can bring our cellphone to school but we can't bring it to the classroom.We don't have to wear school uniforms every day, we can wear our own comfortable clothes. I think my dream will come true!
Practice
1
2
3
【2020·江苏省徐州市】Give me a chance, ________I will give you a wonderful surprise.
A. or B. and C. but D. so
【2020·甘肃省武威市】—Don't keep the lights on when they're not in use!
—________
A. Not at all. B. Sorry, I won't. C. No, thanks. D. I'm afraid so.
【2020·武威市】You haven't eaten all day. You ________ be very hungry.
A. couldn't be B. can't C. might D. must
B
B
D
一、单项选择
Exercise
4
5
【2020·湖南省长沙市】________ your smartphones, and read for at least 30 minutes, every day! You know, reading helps us to deepen our spiritual world.
A. Put away B. To put away C. Putting away
[2020·湖北省宜昌市]—Don’t forget to keep a safe distance（距离）at least one meter, Jack!
—____________.
A. Sorry, I won’t B. No, I can’t do it C. Not at all D. I hope not
A
A
Exercise
二、句型转换（每空一词）
Talk in class. (改为否定句)
______ ______ in class.
I have to do my homework after school. (对画线部分提问)
______ ______ you ______ ______ ______ after school
We have to listen to the teacher. (改为一般疑问句并作肯定回答)
______ we ______ ______ listen to the teacher
______, we ______.
Don’t
talk
Do
have to
What
do
have to do
Yes
1
2
3
do
Exercise
Unit 4 Don’t eat in class. (Grammar Focus-3c)
祈使句(重点为否定结构)
情态动词can表“许可”的用法(肯定及否定陈述，一般疑问句结构及肯定和否定回答)
Grammar
情态动词must的句型结构(仅限肯定陈述)
情态动词have to的句型结构(肯定及否定陈述，一般疑问结构及肯定和否定回答)
Summary
Compulsory homework(必做):
背诵并默写Section A部分中的Grammar Focus。
预习Section B(1a—1d),熟读P22单词。
Optional homework(选做)：
Write about your family rules.
Homework
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