Unit 4 Don't eat in class. Section A (Grammar Focus—3c)课件（18张PPT）

(共18张PPT)
Unit 4 Don’t eat in class.
Section A
(Grammar Foucs-3c)
Review
Free talk.
A: Can you play computer games at home
B: No, I can’t. But I can watch TV on Saturday evening.
C: Oh, I can. But I can only play computer games on
Sunday.
D: ......
Talk about your family rules, school rules or other rules in groups like this:
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
We have to be quiet in the library.
Don’t run in the hallways.
What are the rules
Does he have to wear a uniform at school
What do you have to do
We must be on time for class.
Don’t fight.
Yes, we can./ No, we can’t.
Yes, he does./ No he doesn’t.
1．祈使句概述
祈使句主要用来表示请求、命令、劝告、建议、号召、警告、禁止、祝愿或叮嘱等的句子。祈使句因对象（即主语）是第二人称，所以通常都省略主语。祈使句句首或句尾可用please表示客套语气，句末用句号或感叹号。
祈使句
Go and wash your hands. 去洗你的手。（命令） Be quiet, please. 请安静。（请求）
Be kind to your sisters. 对妹妹要和善。（劝告） Watch your steps. 走路小心。（警告）
Look out! Danger! 小心！危险！（强烈警告） Keep off the grass. 勿践踏草坪。（禁止）
2．祈使句的形式
①“Do”型：动词原形 + 宾语 + 其他
Give me a pen, please. 请给我一支钢笔。
②“Be”型：Be + 表语（名词、形容词）+ 其他
Be quiet, please. 请安静。
③“Let”型：Let + 人称代词宾格 + 动原 + 其他
Let me have a look. 让我看看。
肯定句：
Never say die! 永不言败！
否定句：
④“Don’t”型：Don’t + 肯定祈使句。
Don’t be late for class. 上课不要迟到。
⑤“N”型：
No smoking! 禁止吸烟！
No + V-ing / 名词!
Never + 动词原形 + 其他
No photos! 禁止拍照！
3. 祈使句注意事项：
(1)祈使句主语通常是第二人称，但当主语是第一、三人称时，通常以let为引导词。
Let me tell you the answer. 让我告诉你答案吧。
Let’s have a rest. 咱们休息一下吧。
Let us try again. 让我们再试试吧。（不包括听话者，相当于allow us to try again）
Don’t let anyone disturb you. 不要让任何人干扰你。
(2)有时为了加强祈使句的语气，可在行为动词前加do。
Do come here. 一定要来。
Do let me have another try. 请务必让我再试试。
(3)在祈使句的句首或句尾加please，使语气显得客气，有礼貌。如果在句尾加please，必须用逗号与前句隔开。
Please stand up. 请起立。 Stand up, please.请坐。
(4)祈使句中如果有称呼语或人名，也要用逗号将其与句子隔开。
Do your homework, Tom. 汤姆，做作业。
(5)第二人称主语通常不表示出来，有时为了强调，指明向谁提出要求或发出命令，主语也可表示出来，这时主语须重读。
Jack, close the window! 杰克，关上窗户！
祈使句，祈使句，请求、命令或建议。
主语是you常省去，动词原形开头记。
否定形式要注意，句首要把don’t加。
要讲客气用please，句首、句末没关系。
祈使句用法歌诀
Write the rules for the school library.
Library Rules
1.__________________ 2.__________________
3.__________________ 4.__________________
Don’t talk
Don’t eat or drink
Don’t listen to music
Don’t take photos
3a
No photos
Use the words to make questions about the rules. Then write answers according to your school.
Be quiet (she/have to /in the library)
Q: Does she have to be quiet in the library
A: Yes, she does.
2. Eat (he/have to/in the dinning hall)
Q: _________________________________________
A: _________________________________________
Does he have to eat in the dining hall
Yes, he does.
3b
3. Listen to music (we/can/in the dining hall)
Q: _________________________________________
A: _________________________________________
4. Wear a hat (we/can/in the classroom)
Q: _________________________________________
A: _________________________________________
Can we listen to music in the dining hall
No, you can’t.
Can we wear a hat in the classroom
No, you can’t.
/ Yes, you can.
Make up five cool rules for your dream school. Share your rules with the class. Your classmates vote for the Coolest School!
1. We can eat in class.
2. We don’t have to come to school every day.
3. …
3c
Report
At my dream school, we don’t have to come to school every day. We can eat in class. We …
Exercises
用所给词的适当形式填空。
1. __________ (not put) your book here.
2. John _____ (have) to ______ (wear) sports shoes in
P.E. class.
3. Don’t take ________ (photo) here and there.
4. Does he have to ____ (is) quiet in the library
5. Let’s _____ (eat) in the dining hall.
Don’t put
has wear
photos
be
eat
按要求完成句子。
1. Jack can eat lunch at school. (改为否定句)
Jack _____ ____ lunch at school.
2. You can’t fight in the library. (改为祈使句)
______ ______ in the library.
3. Listen to music in class. (改为否定句)
______ ______ to music in class.
can’t eat
Don’t fight
Don’t listen
1. Suppose you are a librarian,
write rules for the library.
2. Continue to complete 3c in
Page 3c.
Homework
No matter what things, to learn the rules to little detours.
无论做什么事，学好规矩才能少走弯路。
与君共勉