Unit 4-Don't eat in class. Section A （2d-3c）课件(27张PPT）

(共27张PPT)
Don’t eat in class.
Section A
2d-3c
Unit 4
Unit 4
have to/has to/ had to
don’t /doesn’t have to=needn’t
必须 ，不得不
不必、没有必要
1.我们必须穿校服吗？
2.玛丽必须穿运动鞋上体育课。
3.琳达，你不必在上午七点前到校。
4. 他们在学校不得不做什么呢？
5. 我们必须在课上保持安静。
Do we have to wear a uniform
Mary has to wear sports shoes
for PE class.
Linda, you don’t have to get to school
before seven in the morning.
What do they have to do at school
We have to keep quiet in class.
用have to或has to填空。
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 the guitar every day.
have to
have to
has to
has to
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.
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.
2d. Role-play the conversation.
John: Hi, my name’s John. It’s my first day
at school.
Alice: Hi, John. I’m Alice. This is a great
school, but there are a lot of rules.
John: Really What are some of the rules
Alice: Well, don’t be late for class. This
is very important.
John: OK, so we must be on time. Can we bring
music players to school
Alice: No, we can’t. And we always have
to wear the school uniform.
John: I see.
Alice: Oh, and we also have to be quiet in
the library.
Let’s look at Mary’s Monday at school.
There’s a gym class today. I have to wear_____________ .
sports shoes
But there’s a party at school today, so I don’t have to wear ______________.
uniform
After school, I have to clean the _________ .
classroom
We have to wear
a uniform at school.
We have to clean the
Classroom every day.
What else do you have to do
一、祈使句
用法：一般以动词原形开头，表示请 求、命令、劝说、警告等。在祈使句中，通常省略句子主语第二人称you。
2. 句子结构
(1) 肯定句：__________+ 其他
在餐厅里吃东西。
________________________________
在音乐教室里听音乐。
________________________________
骑自行车去上学。
_________________________________
探究乐园
动词原形
Eat in the dining hall.
Listen to music in the music room.
Ride the bike to school.
(2) 否定句: _____ + _________ + 其他
不要和同学们打架。
_______________________________
不要在教室里打篮球。
________________________________
Don’t fight with your classmates.
Don’t play basketball in the classroom.
Don’ t 动词原形
以let引起的句子 ____+ sb.+动词原形
让我们步行去上学吧。 _________________
(4) No + 动词-ing形式。表示“禁止、规劝”
禁止停车！No Parking. 禁止吸烟！No Smoking.
Let
Let’s walk to school.
观察句子中have to 的使用，可知have to是由于客观需要而必须、不得不做某事。
结构: 主语＋have to＋动词原形＋其他
1）一般现在时, 主语是第三人称单数时, 用has to。
2) 否定形式: 主语＋don’t have to＋动词原形＋其他。
观察与思考 1
一般现在时, 主语是第三人称单数时,用doesn’t have to。
Nick wear a uniform. 尼克不必穿制服。
doesn't have to
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. __________________
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？
___________________________
阅读Grammar Focus部分，完成下列句子。
Don’t fight.
Don’t run in the hallways.
What are the rules
We must be on time for class.
Grammar Focus
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
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.
Grammar Focus
观察与思考 2
情态动词can表示能力 “会, 能”
Can you play the guitar 你会弹吉他吗？
I can dance and sing. 我能跳舞又能唱歌。
结构: 主语＋can＋
have to意思是“必须、不得不”, 它侧重于客观
上的必要和外界的权威。
结构: 主语＋have to＋
do动词原形
do动词原形
Library Rules
Don’t talk.
__________________
__________________
__________________
3a Write the rules for the
school library.
Writing
Don’t listen to music.
Don’t eat or drink.
Don’t take photos.
方法指导：
1. 由图示可知都是一些禁止类的祈使句。
2. 可知应用“Don’t + 动词原形”句子。
3a. Write the rules for the school library.
Library Rules
1.
2.
3.
4.
Don’t talk.
Don’t eat.
Don’t listen to music.
Don’t take photos.
Run.
_____ run.
Don’t
Don’t walk.
Walk.
Look at signs you see in your daily life
and try to describe them in English.
3b. Use the words to make questions about the rules.
Be quiet
Q: Does she have to be quiet in the library
(she/have to/in the library)
A: Yes,she does.
Eat
Q:______________________________________________________
(he/have to/in the dining hall)
A:__________________
Does he have to eat in the dining hall
Yes, he does.
Listen to music
Q:______________________________________________________
(we/can/in the hallways)
A:__________________
Wear a hat
Q:______________________________________________________
(we/can/in the classroom)
A:__________________
Can we listen to music in the hallways
No, we can’t.
Can we wear a hat in the classroom
No, we can’t.
We can eat in class.
We don’t have to come to school every day.
…
3c. Make up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!
At my dream school, we don’t have to come to school every day. We …
Press conference
Dear students,
In order to have a good environment (环境), we should have some rules in our school. Here are some suggestions; we hope that all of us can have a look at them.
1. Don’t sleep in class.
2. Clean the classroom every day.
3. __________________________
4. __________________________
5. __________________________
6. __________________________
Yours ____
假如你是学校的校长,你想制订哪些校规,
将其记录并尝试告诉校长你的想法。
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).
5. John is often late for _______ (class).
class
listen
clean
wear
arrive
课堂练习
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 take photos here.
____ photos here.
Come in
Let help
Don’t eat
Don’t be
No
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.
Report
Great! Jim’s school is the coolest.
1. He has to eat breakfast quickly. (改为一般疑问句)
__________________________________
2. Play volleyball after class. (改为否定句)
________________________________
句型转换
Does he have to eat breakfast quickly
Don’t play volleyball after class.
3. We can wear sports shoes in class. (改为一般疑问) ______________________________
4. Don’t arrive late for class. (改为同义句)
_______________________________
5. Eric has to do his homework before six. (对划线部分提问)
___________________________________
Can we wear sports shoes in class
We must be on time for class.
What does Eric have to do before six
1. Review the sentence models in Grammar Focus.
2. Collect much more signs you see in your daily life
and try to describe them in English.
(搜集更多你在生活中遇到的标志,试试用英语翻译。)
Homework