人教版七年级下册 Unit 4 Where's my schoolbag? Section A Grammar Focus-3c 课件 (共25张PPT)

(共25张PPT)
Unit 4
Don’t eat in class.
Section A Grammar Focus-3c
1. 不要在楼道里跑。 _______________________
2. 不要打架。 _______________
3. 不要在课上听音乐？ __________________________
4. 我们必须准时。__________________________
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。
______________________________
Don’t fight.
Don’t run in the hallways.
Don’t listen to music in class
We must be on time
Can we eat in the classroom
No, we can’t, but we can eat in the dining hall.
Complete the sentences.
Revision
Don’t eat!
Don’t listen to music!
Lead in:
Talk about rules in our life:
Look at the signs and talk about them in different ways.
Don’t smoke!
Don’t talk !
Don’t take photos!
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
Presentation:
Read the sentences:
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.
_______________________________
根据 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.
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.
1.什么是祈使句？
用于表达命令，请求，劝告， 警告，禁止等的句子就叫做祈使句。
2.祈使句的特点
1.Open the door(打开门)!
2.Look at the book.
3.Don’t eat in the classroom.
1.主语（多数是You,一般省略）
2.开头：动词原形
3.否定形式：Don’t ＋动词原形
(1.)肯定祈使句
1.__________(look) at me, please！
2._________ （be ）careful when you go out at night!
3.--Let ’s _______(play) the piano for half an hour.
Do型
Be型
Let型
Look
Be
play
以动词原形开头
Be ＋(形)
let＋sb.＋动词原形
Listen to me!
Be quiet!
Let ’ s go!
3.祈使句的类型
（2）否定祈使句
Don’t型
No 型
Let否定型
Don't ＋动词原形
No ＋doing / 名词
Don’t let…＋动词原形
Don’t talk!
No photos!/ No taking photos
Don’t let it go!
1.Don’t _______（talk）in class！
2.No ________ (run), it's dangerous(危险的) to do so !
3.Don’t let him ___（eat）in class.
talk
running
eat
巧变祈使句
句型72变：
1.Open the door ,please!(变否定句）
2.You can’t be late for school.（变成祈使句）
3.You must wear your uniform! （变成祈使句）
Don’t open the door, please!
Don’t be late for school!
Wear your uniform(,please)!
3a
Write the rules for the school library.
Library Rules
1. ______________________________
2. ______________________________
3. ______________________________
4. ______________________________
Don’t talk.
1
2
3
4
Don’t eat in the library.
Don’t listen to music in the library.
Don’t take photos in the library.
拍照
3b
Use the words to make questions about the rules. Then write answers according to your school.
Q:____________________________________(she/have to/in
the library)
A: ____________________________________.
Be quiet
Does she have to be quiet in the library
Yes, she does
Eat
Q:___________________________________ (he/have to/in
the dining hall)
A:___________________________________
Does he have to eat in the dinning hall
Yes, he does.
Q:___________________________________(we/can/in the
hallways)
A:___________________________________
Listen to music
Can we listen to music in the hallways
No, we can’t.
Wear a hat
Q:___________________________________(we/can/in the
classroom)
A:___________________________________
Can we wear a hat in the classroom
No, we can’t.
4.情态动词have to与must
情态动词must和have to都有“必须”的含义，它们的用法如下：
1. must 表示 “必须”、“应该”。
例：We must listen to the teacher in class.
上课时我们必须 听老师的 。
2. must的否定形式：must not = mustn’t 表示 “禁止”、“不准”。
例：You mustn’t talk in class. 你上课不准讲话。
3.must开头的一般疑问句，肯定回答用must，
但否定回答用needn’t 或 don’t have to。而不用mustn’t来回答
例如：Must I do my homework this evening
—Yes, you must.
—No, you needn’t. / No, you don’t have to.
have to 表示“必须”、“不得不”，
三单现形式为 has to,
否定形式是 don’t have to
例：We have to get up early in the morning.
请将上句话改为一般疑问句
we get up early in the morning
Do
have
to
must与 have to的区别：
must表示说话人的主观看法，
而have to则表示的是客观需要。
I must go now. (主观看法)
My mother is ill (生病的), so I have to go now. (客观需要)
句型转换：
1. You can’t take photos in our library. (改为祈使句)
______________ ______________ photos in our library.
2. She has to walk to work every morning. (改为一般疑问)
__________she _________ to walk to work every morning
3. At my home I must do my homework first. (改为同义句)
At home I ___________ ________do my homework first.
4. Do your homework carefully. (改为否定句)
_______________ ____________your homework carefully.
5. Don’t eat in class, John. (改为同义句)
____________ ______________________in class, John.
Don’t
take
Does
have
have
to
Don’t
do
No
eating
Exercises:
用所给单词的适当形式填空：
1. _______ _________(not listen) to music in bed.
2. Do you have to ________(clean) the room every day
3. You can’t ________(wear) a hat in class.
4. Please ________(arrive) at school on time (准时).
5. John ____ (be) never late for class in the morning.
is
listen
clean
wear
arrive
Don’t
6. Does he ______(have) to be on time
7. We have to ____(be) quiet in the library.
8. You must ______(eat) in the dining room.
9.She (have to )make breakfast before going to school.
10. She __________(not) have to wear a uniform.
have
be
eat
doesn’t
has to
thank you！