Unit 4 Don’t eat in class.Section A (Grammar Focus-3c)课件(共30张PPT)

(共30张PPT)
Unit 3 Don’t eat in class.
Section A Grammar Focus-3c
1. Is John new at school
___________
2. Are there many rules at school
______________
Recite 2d on page 20 and answer the questions.
Yes, he is.
Yes, there are.
3. Can he bring music players to school
_______________
4. Do they have to always wear the school uniform
_______________
5. What’s the library rule
___________________________
No, he can’t.
Yes, they do.
We have to be quiet.
Revision
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.
Objectives
Look and say
Don’t ________________!
Don’t _____.
fight
Don’t _________________.
run in the hallways
eat in the classroom
Let's play a game!
Who knows these signs
Look and say
Don’t _____________ class.
arrive late for
Don’t ____________
_______!
listen to music
in class
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
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。
*主语一般为第二人称，但通常省略。
*肯定式一般以动词原形开头，
否定式通常在动词原形前加don’t。
*为使祈使句更委婉、有礼貌，可在祈使句开头或末尾加please。
*句末一般用句号，表示强烈语气时用感叹号。
祈使句的句型结构
1. 肯定祈使句的常见句型结构：
① Do型：动词原形+宾语+其他.
Open the door, please.
② Be型：Be+表语. 如：Be a good boy!
③ Let型：Let+宾语+动词原形+其他.
Let’s+动词原形+其他.
Let me help you.
Let’s play tennis.
祈使句的句型结构
2. 否定祈使句的常见句型结构：
① Do型和Be型的否定式：
Don’t+动词原形 / be+其他.
Don’t forget me.
Don’t be late.
② Let型的否定式：
Don’t+let+宾语+动词原形+其他.
Let’s+not+动词原形+其他.
Don’t let him go back.
Let’s not go swimming.
③ 警示语：No+名词 / 动词-ing形式.
No talking.
Practice
将下面的句子改为祈使句，每空一词。
1. You can come in.
_____ ____, please.
2. I can help you.
____ me _____ you.
3. You can’t eat in class.
_____ _____ in class.
4. You can’t be late for school.
_____ _____ late for school.
5. You can’t talk in the library.
_____ talking in the library.
Come in
Let help
Don’t eat
Don’t be
No
Grammar Focuse
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.
2.can在本单元主要表示什么含义？它还可以表达什么意思？
1.圈出情态动词，情态动词在用法上有什么共同点？
3.have to在句法上与其他的情态动词的区别
情态动词 can
本单元can意为“可以”，表示请求、允许
I can dance and sing.
2) can还可表示能力，“能，会”
-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: 主语+can+动词原形+其他.
否定：
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
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.
You must come in time.
你必须按时来。
Meat must be cooked thoroughly.
肉必须彻底煮熟。
情态动词have to
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。
Look and say
They _______wear the uniform every day.
-Yes, ______.
-Do you ___________ the
uniform every day
have to
-No, ________.
we do
we don’t
have to wear
Look and say
She _______do homework
every day.
has to
I _____________ my bedroom on weekends.
have to clean
Look and say
1. 我们可以在教室里吃东西吗？
_____________________________
2. 不能。但我们可以在餐厅里吃东西。
________________________________
________________________________
3. 我们可以在上课的时候带帽子吗？
_____________________________
4. 我们必须按时上课.
_______________________________
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
We must be on time for class.
阅读Grammar Focus部分，完成下列句子。
Look and say
5. 他在学校里必须穿校服吗？
__________________________________
6. 是的，必须。/ 不，不必。
_______________________________
7. 你们必须做什么？
_______________________________
8. 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.
Look and say
Library Rules
Don’t talk.
__________________
__________________
__________________
___________________
3a Write the rules for the school library.
Don’t listen to music.
Don’t eat or drink.
Don’t take photos.
Don’t smoke.
Writing
Be quiet (she/have to /in the library)
Q: Does she have to be quiet in the library
A: Yes, she does.
3b Use the words to make questions
about the rules. Then write
answers according to your school.
Writing
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: ____________
Then answer the questions.
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.
Writing
At my dream school, we don’t have to come to school every day. …
We can eat in class. …
3c Make up five cool rules for your
dream school. Share your rules with
the class. Your classmates vote for
the Coolest School!
Report
At my dream school, we don’t have to come to school every day. We can eat in the classroom.
We can listen to music in class.
We don’t have to do homework.
We don’t have to wear school uniforms at school.
Review 课时重点回顾
Don’t run in the hallways.
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.
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.
Homework
用所给单词的适当形式填空。
1. Don’t ________(listen) to music in the
library.
2. Do we have to ______ (clean) the room
every day
3. You can’t ________(wear) sunglasses in
the classroom.
4. Please ________ (arrive) at school on
time (准时).
listen
clean
wear
arrive
Homework
3. You can’t wear a hat in class.
(改为祈使句)
______ ____ a hat in class.
4. He has to see his grandparents on
weekends. (对划线部分提问)
What _____ he ____ ____ ____ on
weekends
5. Come in, please. (改为否定句)
_____ _____ in, please.
Don’t wear
does
have to do
Don’t come
Homework
1. 我们必须按时到校。
We must _____ _____ school ___ _____.
2. 你能把你的电子游戏带到学校来吗？
Can you _____ your computer game ___ 　　　
school
on time
bring
根据所给汉语完成英语句子，每空一词。
to
arrive at
Homework
3. 周末迈克经常在外面吃饭。
Mike often ____ ______ on weekends.
4. 星期天你不必早起。
You _____ _____ ___ get up early on
Sundays.
5. 不要在走廊里乱跑。
______ ____ in the hallways.
eats outside
don’t have to
Don’t run
谢 谢！