Unit 4 Don't eat in class.Section A Grammar Focus-3c课件（共有PPT36张）

(共36张PPT)
Don’t eat in class.
Unit 4
Section A 2
Grammar Focus-3c
1. 不要在走廊里跑。
______________________________
2. 不要打架。
_____________________
3. 我们必须准时上课.
_______________________________
4. 上课禁止吃或喝东西.
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5.上课禁止听音乐。
___________________
Don’t fight.
Don’t run in the hallways.
We must be on time for class.
Revision
完成下列句子。
Don’t eat or drink in class.
Don’t listen to music in class.
School rules
Don’t arrive late for school.
Don’t eat or drink in class.
Don’t fight.
Don’t bring mobile phones to school.
Don’t litter.( 乱扔)
Be quiet in class.
Listen to teachers carefully.
Clean the classroom every day.
Be polite( 礼貌的) to teachers.
Wear school uniforms
You can’t arrive late for school.
Can you arrive late for school
No, we can’t.
We must be on time.
Must you be on time
Yes, we must.
Must you arrive at school before seven o’clock
No, we needn’t. / don’t have to.
We have to wear school uniforms.
Do you have to wear school uniforms
Yes, we do. No, we don’t.
We don’t have to wear school uniforms.
She has to eat lunch at school.
Does she have to eat lunch at school
Yes, she does. No, she doesn’t.
She doesn’t have to eat lunch at school.
must 表示主观上必须
have to 表示客观需要不得不 .
Do you have to look after your mother
Does she have to look after her mother
walk home
Does he have to walk home
Does she have to eat lunch at school
Do you have to help your mother make dinner every day
Does she have to help her mother make dinner every day
Must you clean the classroon now
Must she water the flowers every day
Must you do your homework every day
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
8. 他在学校里必须穿校服吗？
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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。
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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.
肯定的祈使句：直接以动词原形开头的句子。
Come in, please! 请进！ Sit down, please. 请坐。
Be quiet！保持安静！ Let's go home. 我们回家吧。
否定的祈使句：
1. 在动词前(即句首)加Don’t.
Don’t talk in class! 不要在课堂上讲话！
Don’t open the window! 别开窗！
Don’t be late for school! 上学别迟到
祈使句常常是表达说话人对对方的劝告、叮嘱、请求或命令等。句中一般没有主语，但根据其句意，实际上是省略了主语you。
祈使句
2.在公共场合的提示语中，常用“No＋名词/V-ing形式”结构，表示禁止做某事。例如：No photos! 禁止拍照！
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。
_________________________________
回忆祈使句
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
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！__________！ 禁止吸烟！____________！
禁止游泳！______________！
Let’s walk to school.
No Parking
No smoking
No swimming
Library rules
1. Don’t talk.
2. __________
3. __________
________
4. __________
_______
Don’t eat.
Write the rules for the school library.
3a
Don’t listen to music.
Don’t take photos.
Use the words to make questions about the rules. Then write answers according to your school.
3b
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
No, he doesn’t. He can also eat outside.
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.
Make up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!
3c
1. We can eat in class.
2. We don’t have to come to school every day.
3. …
Language points
情态动词can的用法
1) 表示能力 “会, 能”
Can you play the guitar
你会弹吉它吗？
Judy can speak a little Chinese.
朱蒂会说一点中文。
I can dance and sing.
我能唱歌又能跳舞。
词语链接
2) 表示允许、许可等。
Can the students run in the hallways
学生们可以在走廊上跑吗？
We can eat outside.
我们可以在外面吃东西。
3）表示请求
Can I help you
注意: 和大部分情态动词一样, can在否定句中, 直接在can后加上not, 在疑问句中, 把can放到主语前面, 并且没有人称和数的变化。
祈使句是用来表示请求、命令、叮嘱、号召或者劝告等的句子, 这类句子的主语常是第二人称you,也就是听话者,因而you常省去了。祈使句的开头是动词原形。可在句首或句末加上please，若在句末加please，之前要用逗号隔开。祈使句有肯定祈使句与否定祈使句两种。
如:
Look out! 小心！
Wait here for me! 在这等我！ Be sure to come here on time! 务必准时来到这里！
Listen to music outside.
Don’t listen to music outside.
Do your homework at school.
Don’t do your homework at school.
祈使句的否定形式多以do not (常缩写成don’t) 开头, 再加上动词原形。
1. 肯定祈使句的常见句型结构：
① Do型：动词原形+宾语+其他. 如：
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.
(或：Let’s+动词原形+其他.) 如：
Let me help you.
又如：Let’s play tennis.
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. 如：Don’t forget me.
又如：Don’t be late.
② Let型的否定式：Don’t+let+宾语+动词原形+其他. (或：Let’s+not+动词原形+其他.) 如：Don’t let him go back. 又如：Let’s not go swimming.
③ 警示语：No+名词 / 动词-ing形式. 如：
No talking.
1.Mr Green smoke here, because
there’s a sign on the wall. It says “No
smoking.”
2.It’s very hot outside. You wear a hat.
3.We eat in the classroom, because
it’s impolite to teachers.
4.I go to bed after 11:00 on school night.
5.The students read books and
magazines in the library.
can’t
can
can
can
can’t
Practice
根据句意，用can和can’t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 guitar every day.
have to
have to
has to
has to
用have to或has to填空。
Practice
1. 抄写Grammar Focus 两英一中;
2. 抄写P123 Unit 4 单词五英一中;
Thank you!