Unit 4 Don't eat in class-SectionA (3a-3c)课件(共15张PPT)

(共15张PPT)
七年级英语（下）人教版
Unit 4 Don’t eat in class!
Section A (3a~3c)
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。
探究乐园
2. 句子结构
a.肯定句：__________ + 其他 .
(1)在餐厅里吃东西。
________________________________
(2)在音乐教室里听音乐。
________________________________
(3) 骑自行车去上学。
_________________________________
动词原形
Eat in the dining hall.
Listen to music in the music room.
Ride the bike to school.
肯定的祈使句：
Come in, please! 请进！
　 Sit down, please. 请坐。
　 Let's go home. 我们回家吧。
否定的祈使句是在动词前(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
b.否定句: _____ + _________ + 其他.
(1)不要和同学们打架。
_______________________________
(2)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
c.以let引起的句子 ____+ sb.+动词原形.
让我们步行去上学吧。 _________________
d. 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.
Library Rules
Don’t talk.
__________________
__________________
__________________
Write the rules for the school library.
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
Use the words to make questions about the rules. Then write answers according to your school.
3b
1. Be quiet (she/have to/in the library)
Q: __________________________
A: __________________________
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: ________________________
Does he have to eat in the dining hall
Yes, he does.
Can we listen to music in the hallways
No, we can’t.
Can we wear a hat in the classroom
No, we can’t.
Does she have to be quiet in the library
Yes, she does.
At my dream school, we don’t have to come to school every day …
We can eat in class…
Make up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!
We don’t have to wear school uniforms …
We can listen to music in class …
3c
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. listen 的用法:
Language points
1) listen 听 用来提醒某人注意,后面不跟事物。
Listen! Who’s singing in the classroom 听！谁在教室里唱歌？
2) 如果后面跟要听的事物，应跟介词to再跟事物。
Listen to our teacher carefully.认真听老师讲。
2. fight 打架;争吵
1) 作动词。
Jack never fights with his brother.杰克从不和他的弟弟打架。
2) 作名词, 意为“打架；争吵”; 常用词组have a fight“打架;吵架”。
Did you have a fight with her 你和她吵过架吗？
3. wear 意为“穿、戴”
My aunt wears a blue skirt and a white T-shirt.
我姑姑穿着蓝色的裙子，白色的T恤。
Does he wear glasses 他戴眼镜吗？
4. What are the rules 规则是什么？
rule“规则”，可数名词，构成的短语有：
　obey the rules 遵守规则
be against the rules 违反规则
break the rules 打破规则
5. 情态动词have to 的用法
have to意为“必须，不得不”，侧重于客观上的必要
和外界的权威。
结构: 主语＋have to＋动词原形＋其他.
主语是第三人称单数时, 用has to。
如：We have to wear sneakers for gym class.
在体育课上， 我们必须穿运动鞋。
Tom has to practice the guitar every day.
汤姆每天必须练习弹吉他。
I had to get up at 5:00 am last Monday.
上周一， 我不得不早上5点起床。
2) 否定形式: 主语＋don’t have to＋动词原形＋其他.
主语是第三人称单数时, 用doesn’t have to。
如：Nick doesn’t have to wear a uniform.
尼克不必穿制服。
We didn’t have to do our homework at once.
我们不必马上完成作业。
3) 疑问句: Do(Does)＋主语＋have to ＋动词原形＋其他.
如: —Do you have to stay at home on weekends
周末你必须待在家里吗？
—Yes, I do. / No, I don't.
是的，我必须。/ 不，我不必。
1. He has to eat breakfast quickly. (改为一般疑问句)
__________________________________
2. Play volleyball after class. (改为否定句)
3. We can wear sports shoes in class. (改为一般疑问句)
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)
Don’t play volleyball after class.
句型转换
Does he have to eat breakfast quickly
exercises
Can we wear sports shoes in class
We must be on time for class.
What does Eric have to do before six
Thank you!