资源简介

(共24张PPT)
人教版英语
七年级下册
Unit-4
Don’t eat in class.
Section A[3a-3c]
Our school rules
*be quiet in the library
*bring music players to school
*Wear the school uniforms
Review 2d
Don’t
must
can‘t
have to
*be late for class
*be on time
1. 不要在楼道里跑。
_______________________
2. 不要打架。
_______________
3. 有什么规则？
__________________________
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？
______________________
8. 是的。/ 不是的。
______________________
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
Yes, we can. / No, we can’t.
9. 他在学校里必须穿校服吗？
_________________________________
10. 是的，必须。/ 不，不必。
_______________________________
11. 你们必须做什么？
_______________________________
12. 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.
祈使句
祈使句是表示请求、命令、建议等的句子。
句子中通常不出现主语，谓语动词一律用原形。
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。
二、祈使句的否定式
1. Do型和Be型的否定式在句首加don’t。
e.g. Don’t come here. 不要来这儿。
Don’t be late. 别迟到。
Don’t + 动原 + 其它.
Sit down!
Stand up!
Come in!
Don’t sit down!
Don’t stand up!
Don’t come in!
肯定祈使句
否定祈使句
Don‘t smoke.
No smoking.
Don‘t part.
No parting.
Don‘t litter.
No littering.
Don‘t take photos.
No photos.
smoke-v.吸烟
park-v.停放
litter-v.乱丢
take photos-拍照
Library rules
1. Don’t talk.
2. __________
3. _________________
4. _________________
Don’t eat.
P21 Write the rules for the school library.
Don’t listen to music.
Don’t take photos.
3a
④
③
②
①
No talking !
No food !
No music !
No photos !
Library Rules
No talking!
No school bags!
No food!
No wet umbrellas!
No listening to music!
No photo!
情态动词
have to
情态动词+动词原形
情态动词无人称和数的变化
情态动词置于句首变一般疑问句
情态动词的否定形式于其词尾+not
1. We ______ clean our classroom after school.
2. She ______ make her bed after getting up.
3. It’s late. Mr. Beckman ______ go to work by car.
4. Emily and Peter join a music club.
They ________ practice guitar every day.
have to
have to
has to
has to
I. 用have to或has to填空
-Do you have to…in the school
-Yes, we do. We have to… /No, we don’t. We don’t have to…
wear school uniforms every day
clean the classrooms every day
do morning exercises every day
do homework every day
have classes from Monday to Saturday
arrive at school before 7:00am
listen to English every day
情态动词
情态动词+动词原形
情态动词无人称和数的变化
情态动词置于句首变一般疑问句
情态动词的否定形式于其词尾+not
must
我必须现在做作业。 _________________________
他必须今天完成作业。________________________
我们必须要守时。 ________________________
I must do my homework now.
He must finish his homework today.
We must be on time.
must作为情态动词，表示“必须”、“务必”，
有时还表示“一定”，起到加强语气的作用。
5.她一定有这本字典。_________________________
6.玛丽肯定迟到了。 _________________________
She must have this dictionary.
Mary must be late.
7.我必须要现在做作业吗？_________________________
是的。/ 不是的。 _________________________
Must I do my homework now
Yes, you need. / No, you needn’t.
You mustn’t listen to music.
You mustn’t talk.
You mustn’t litter.
You mustn’t smoke.
情态 动词 +动原 人称和数的变化 一般疑问句 否定形式
can will
have to
must
√
√
√
have to
has to
Can you…
Yes, I can.
No, I can’t.
can’t
Do you have to…
Yes, I do.
No, I don’t.
don’t/doesn’t
have to
没必要
Must I …
Yes, you need.
No, you needn’t.
mustn’t
禁止
Can we wear a hat
We can’t arrive late.
We can’t wear a hat.
Can we arrive late for school
The rule:______________________
The rule:_______________
Don’t arrive late for school.
Don’t wear a hat.
School rules--don’t
Can we be late for class
Can we talk loudly(大声地) in class
The rule:_________________
We must be on time.
The rule:_______________
We must be quiet.
School rules--must
Yes. She has to wear school uniform.
Yes. They have to listen to the teacher in class.
Does she have to wear a school uniform
Do they have to listen to the teacher in class
The rule:____________________________
We have to wear school uniforms.
The rule:__________________________________
We have to listen to the teacher in class.
School rules—have to
谢谢
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