资源简介

(共30张PPT)
Unit 2
No Rules, No Order
Section A Grammar Focus
熟练掌握祈使句的四种类型，明确其肯定式、否定式结构及表达功能。
理解情态动词 can、must、have to 的用法及区别。
能正确运用祈使句的不同类型完成句子填空、规则改写等练习，做到结构规范。能小组合作，为图书馆、餐厅等场所 brainstorm 规则，并用祈使句和目标情态动词进行书面记录和口头展示。
学习目标
1
2
3
I can do anything
I can do anything today
I can do anything
I can do anything today
I can go anywhere
I can go anywhere today
I can go anywhere
I can go anywhere today
Listen to a song！
Can you do anything you like in your life
Rules
Lead in
Can we _____________
Don’t _________________.
No, we can’t. We must _________.
be late for class
be on time
be late for class
Look and say
Review
Can we ____________________
Don’t ___________________.
No, we can’t. We have to _________.
run in the hallways
walk
run in the hallways
Look and say
Look and say
Can we___________
Don’t _________________.
No, we can’t. We can _______
___________________.
eat in class
in the dining hall
eat
eat in class
Walk in the hallway. Don’t run!
Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter.
Can we bring our phones to class No,we can’t. We must keep them in our lockers.
Can we eat snacks in class No, we can’t eat in class. We have to eat in the dining hall.
其肯定形式常以动词原形开头，
否定形式是在动词原形前加don’t。
为表示礼貌，可以在句首或句末加上please。
Find the Imperative sentences
Grammar Focus
祈使句 (Imperative sentences)
祈使句一般用来表示请求、命令、劝说、号召、警告等。在祈使句中，通常省略主语第二人称you。
Please pass me the pen.
Close the window now.
Be careful when you cross the street.
Don’t play on the busy road.
表请求
表命令
表劝告
表警告
祈使句分类
Do型
Be型
Let型
No型
Don’t smoke here !
Don’t run in the hallway!
1. Do型祈使句
实义动词原形(+宾语)(+其他).
Look!
Listen!
Sit down!
Stand up!
Open your book!
Wear the school uniform!
Don’t +实义动词原形(+宾语)(+其他).
否定句
动词原形
动词原形+副词
动词原形+宾语
Don’t be nervous!
Don’t be late for class!
2. Be型祈使句
Be+表语(+其他).
Be careful!
Be polite and treat one another with respect.
否定句
Don’t+be+表语(+其他).
Don’t+let+宾语+动词原形(+其他).
或Let +宾语+not+动词原形(+其他).
3. Let型祈使句
Let+宾语+动词原形(+其他).
Don’t let them make any noise.
Let’s not say anything about it !
肯定句：
否定句：
Let’s have a rest.
多为公共场合的提示语。
No smoking !
No photos !
Never give up！
4. No+ 动词-ing/名词!
Never +动词原形!
多用来加强语气。
Read the sentences. Do the verbs in bold need to change forms Why
Walk in the hallway. Don’t run!
Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter.
Can we bring our phones to class No,we can’t. We must keep them in our lockers.
Can we eat snacks in class No,we can’t eat in class. We have to eat in the dining hall.
No, they don’t. Because the verbs appear in imperative sentences or after modal verbs.
Find the modal verbs!
3a
Walk in the hallway. Don’t run!
Be polite and treat one another with respect. Don’t litter. / You mustn’t litter. / You can’t litter.
Can we bring our phones to class No,we can’t. We must keep them in our lockers.
Can we eat snacks in class No, we can’t eat in class.
We have to eat in the dining hall.
情态动词can、have to与must
情态动词用于表达说话人的态度、意愿、推测、建议、能力等。
它们通常没有人称和数的变化。
并且后面必须跟动词原形来构成完整的谓语。
情态动词can的用法
表示能力，意为“能，会”。
We can speak a little English.
I can play badminton, but I can’t play volleyball.
You can play basketball at the weekend.
We can’t run in the hallways.
表示许可，意为“可以”。
—Can you help me with my Chinese
—Yes, I can.
表示请求，意为“可以”。
can的意思有 。
can的否定形式为 。意思为 。
can引导一般疑问句时，肯定回答 ，
否定回答 。
能，会/可以
can’t
不能/不可以
Yes, 主语+can
No, 主语+can’t
情态动词must的用法
表一定，必须
We must be on time.
She must do her homework tonight.
You mustn’t eat in class.
He mustn’t bring the phone to school.
表禁止
must的意思是 。
must的否定形式为 。意思为 。
Must是情态动词，没有 的变化
一定；必须
mustn’t
禁止
时态，人称和数
情态动词have to的用法
不得不
We have to clean our classroom every Friday.
否：We have to clean our classroom every Friday.
He has to keep the phone in the locker.
否：He have to keep the phone in the locker.
不必
have to的意思是 。
have to有 的变化,三单形式是 。
过去式是 。
have to的否定形式为 。意思为 .
不得不
had to
has to
时态，人称和数
don’t
doesn’t
don’t/doesn’t/didn’t have to
不必
例句 I don’t like English, but I_________learn it well because it’s important. I like English. I learn it well.
含义
人称变化
否定形式
客观条件、规则或他人要求导致的
说话人主观上的
have to
must
有时态，人称和数变化
无有时态，人称和数变化
don’t/doesn’t have to
含义：不必
mustn’t
含义：禁止、不允许
情态动词have to和must的用法区分
have to
must
“不得不”
“必须、一定要”
1. ——______ late for class next time. ——Sorry, I won’t.
Don’t B. Don’t be C. Not be D. Isn’t
2 Please ______ your hands if you know the correct answer.
raise B. raising C. raised D. to raise
3. ______ talk loudly in the library. It’s against the library rules.
Not B. No C. Don’t D. Doesn’t
4. —______ you swim across the river
—No, I can’t. It’s too dangerous.
A. Can B. Must C. Have to D. Should
5. My mother is ill, so I ______ stay at home and look after her today.
A. can B. must C. have to D. might
6. —______ I use your dictionary for a minute —Of course, you can.
A. Must B. Have to C. Can D. Should
Exercises
1. Don’t jump the queue. You ___________ wait your turn.
2. I _____ feed my dog many kinds of food, but I ____give him chocolate. It is bad for him!
3. A: Can I leave the classroom if I don’t feel well
B: Yes, but you ___________ tell your teacher about it when you ______ be absent from class.
Complete the sentences using can, have to / must, or can’t / mustn’t.
have to / must
can
have to / must
have to
can’t
4. A: Hey! Can I look at your book
B: Shh, we ___________ talk quietly in the library.
5. A: Can you put on your seat belt We ___________ wear one when we’re in a car.
B: Sure. Thanks!
have to/must
have to/must
插队
排队等候
n. 种类
对…有坏处；
缺席
adj+ly→adv.
穿；戴（强调动作）
反：be good for
穿；戴（强调状态）
3b
Do not eat or drink.
No eating or drinking.
You can’t / mustn’t eat or drink.
Do型祈使句
No型祈使句
情态动词
Look at the first sign and read the rules. Then write the rules for the other signs.
3c
Do not here.
No .
You can’t / mustn’t here.
Do not here.
No .
You can’t / mustn’t .
park
parking
park
take photos
photos
take photos
Look at the first sign and read the rules. Then write the rules for the other signs.
3c
Do not here.
No .
You can’t / mustn’t here.
Do not .
No .
You can’t / mustn’t .
Look at the first sign and read the rules. Then write the rules for the other signs.
swim
swimming
swim
feed birds
feeding
feed birds
3c
In groups, brainstorm three rules for one of the places below. Then draw signs to show the rules. Share your signs in class and explain what they mean.
library school dining hall park cinema hospital
Rules in .
We mustn’t make noise.
We must keep quiet.
We can’t eat.
library
3d
S1:In the...., there are some important rules.First,we mustn’t/don’t.....(show the sign)
S2:Second, we can’t ...(show the sign)
S3:Finally, we have to/must ......(show the sign)
Together: No Rules, No Order. Everyone should follow the rules.
Discuss and report
Evaluation Criterion Are the rules suitable (合适的)for the place
Do you use modal verbs or imperative correctly
Is the report clear and fluent(清晰流利）
Grammar
1. 祈使句的表达
2. 情态动词的用法
Key words
turn, leave, absent, quietly
Expressions
jump the queue, wait for
课堂总结
单项选择
1.David, _______ make trouble at school.
A.can’t B. don’t C. doesn’t D.didn't
2.—Mom, can I play computer games this evening
—_______ your homework first, and then we’ll talk about it.
A. Finishing B. Finish C. To finish D. Finished
3.Buses _______ stop when the traffic lights turn red.
A. can B. may C. must D.might
B
B
C
当堂检测
4.We should keep quiet in the library. We _____ speak loudly （大声地）.
A. must B. mustn’t C. can D. needn’t
5.I _____ go now, or I’ll miss my train.
A. can B. have to C. must D. could
6.He _____ stay at home, because it’s raining outside.
A. have to B. has to C. must D. can’t
B
B
B
Homework
把 “We can eat in the dining hall” 改为否定句和祈使句两种形式。
和家人用英语讨论 1 条家庭规则，记录 1 句核心表达。

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