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人教版英语7年级下册培优备课精做课件Section A What rules do we follow Lesson 3 Grammar Focus (3a-3d)Unit 2 No Rules,No Order授课教师：Home .班级：七年级（---）班.时间：.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。祈使句的主语一般是第二人称you，但往往省略。祈使句的肯定式以动词原形开头，否定式在动词原形前加don't。
e.g. Just go along this street and turn left.
Be careful when you cross the street.
Practise the guitar every day.
Don't be late for class.
Don't fight.
祈使句的种类及构成
肯定的祈使句：动词原形+其他.
e.g. Walk in the hallway.
Stand up!
Be polite.
Keep quiet.
Be a good boy.
否定的祈使句：Don’t+动词原形+其他.
e.g. Don’t run in the hallways.
Don’t litter!
Don’t be late.
let型祈使句：Let+第一/三人称+动词原型+其他.
e.g. Let me tell you the way to my house.
Let’s see the lions.
Let him go.
一、用can, have to/ must, can’t或mustn’t填空。（5 分）
1. I like doing morning exercises. It ________ help me keep healthy.
2. You ________ play soccer on the road! It’s too dangerous.
3.—________ I clean the room now
—No, you needn’t. You can do it this evening.
can
mustn't
Must
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4. It’s raining outside. I ________ take an umbrella to school.
5. Helen ________ go shopping with me because her mother needs her to help with housework.
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have to
can't
No型祈使句：No+名词/动名词.
e.g. No parking. 禁止停车。
No photos. 禁止拍照。
No entry. 禁止进入。
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.
祈使句中的动词原型，不需要变换形式。
情态动词后用动词原型。
3a
情态动词（Modal Verbs）
情态动词表示说话人的语气和情态，如请求、许可、意愿、可能等。一般没有人称和数的变化。
情态动词本身不能单独作谓语，必须和动词原形连用。
情态动词的否定式一般是在其后加not构成，一般疑问句通常将它提到句首。
情态动词的肯定式一般不重读。
情态动词can
1. 表示能力（七上Unit 5已经学习）
e.g. I can run fast, but I can’t swim.
2. 表示许可（本单元重点）
e.g. We can play basketball at the weekend.
Students can’t run in the hallways.
Can we bring our phones to class
情态动词must
1. 表示“必须”，否定形式mustn’t 表示“禁止”
e.g. Don’t arrive late for class. We must be on time.
Students mustn’t use their phones at school.
2. 以must开头的一般疑问句，肯定回答用must，否定回答
用needn’t 或者don’t have to， 表示“不必要”
e.g. —Must I clean the classroom now
—Yes, you must./No, you needn’t/don’t have to.
情态动词 have to
表示“不得不；必须”, 在表示“必须”时，与must意义接近，
有时可互换。
e.g. We have to be quiet in the library.
She has to do her homework first when she gets home.
We have to/must follow the rules.
1. must表示说话人的主观看法，语气较为强烈，have to则
强调客观需要。
must与have to区别
e.g. We must hurry. I don’t want to miss the begining of the show.
We have to hurry. The train is leaving in 5 minutes.
2. 它们的否定式含义大不相同。mustn’t表示 “不准；禁止”，
don’t have to表示“不必”。
e.g. You mustn't talk to your mother like that.
You don't have to come if you don't want to.
3. must没有人称和数的变化，而have to有人称和数的变化。
e.g. I / We / You / They must do something about it.
I have to finish my work today.
She has to work late today.
They have to get to the station before five o'clock.
1. Don't jump the queue. You____________wait for your turn.
2. I __________ feed my dog many kinds of food, but I
_____________ give him chocolate. It’s 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
can’t/mustn’t
must
have to
3b
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!
must/have to
must/have to
二、选词并用其适当形式填空。（5 分）
6. No one knows why he is ______ from the meeting.
7. When we are in a car, we must wear our seat ________.
8. My father has a big farm, and he ________ lots of animals every day.
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feed, belt, quiet, leave, absent
absent
belts
feeds
9.［重庆第二外国语学校期中］Don’t make noise. We must talk _________in the library.
10. Jim usually ________ his home at 7:30 and gets to school at 7:50.
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feed, belt, quiet, leave, absent
quietly
leaves
Look at the first sign and read the rules. Then write the rules for the other signs.
Do not eat or drink.
No eating or drinking.
You can't / mustn't eat or drink.
3c
Do not park here.
No parking.
You can't / mustn't park here.
Do not take photos here.
No photos.
You can't / mustn't take photos here.
Do not swim here.
No swimming.
You can't / mustn't swim here.
Do not feed.
No feeding.
You can't / mustn't feed.
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
In the library, we must keep quiet. we mustn’t make noise. We can’t ...
3d
Library Rules
Keep quiet.
No eating or drinking.
Return books on time.
Silence your mobile phone.
In the library, we must keep quiet. We mustn’t make noise. We can’t eat or drink in the library. Because it may make the library untidy. We must return books on time. Last but not the least, we have to make our mobile phones silent.
Library Rules
三、根据汉语意思完成句子。 （11 分）
11.插队是不礼貌的。
It’s not polite _________ ________ _________ ________.
12.我现在很忙。你不需要等我。
I’m busy now. You don’t need to ________ _______ me.
to jump the queue
wait for
点拨：由句意可知，空格处缺少动词短语“等待”，空格前为不定式符号，故用动词原形，填wait for。 wait其他常见用法：can't wait to do sth.迫不及待要做某事。
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13.［重庆北碚区月考改编］Luke 今天病得很严重， 因此他没来上学。
Luke is badly ill today so he _____ ______ _____school.
14.该上课了，不要在教室里制造噪音了。
It’s time for class. Don’t _________ ________ in the classroom.
is absent from
make noise
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四、按要求完成句子，每空一词(含缩略形式)。（23 分）
15. My sister can play the piano well.(改为一般疑问句，并作肯定回答)
—_________ ________ ________ _________ the piano well
—________, _________ ________.
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Can your sister play
Yes she can
16. You must finish your homework now.(改为一般疑问句，并作否定回答)
—________ _________ ________ my homework now
—No, _________ ________ _________ ________.
17. Open the door.(改为否定句)
________ _________ the door.
Must I finish
you don't have to
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Don't open
18. You can’t litter in the library.(改为祈使句)
________ _________ in the library.
19. You should respect and be polite to old people.(改为祈使句)
_________ ________ _________ ________ ________
old people.
Don't litter
Respect and be polite to
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五、根据所给图片及提示词，写出恰当的句子。（4 分）
20. (not, here)
____________________________________
21. (no, eat, hall)
____________________________________
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Don't/Do not take photos here.
No eating in the hall.
22. ( not, in, class)
____________________________________
23. (you, must, lake)
____________________________________
Don't/Do not listen to music in class.
You mustn't swim in the lake.
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六、情境串考点 短文填空。 （20 分）
选择恰当的情态动词或助动词填空。
Kate will go to her new school. She doesn’t want to be late on the first school day so she 24.__________ (can / has to) leave home early.
When Kate gets to school, she meets her teacher Miss Smith.
“Welcome, Kate!” Miss Smith says. “I’ll show you around your new school.”
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has to
First, they walk to the hallway. “25. ________(Can’t/ Don’t) run in the hallways,” Miss Smith says to some boys. Then they come to the classroom.
“This is your locker, Kate. You 26. _________(must / don’t have to) remember the password（密码）. And you 27. ____________(can / have to) leave your bag and jacket here,” Miss Smith tells Kate.
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Don't
must
can
“I see, Miss Smith,” Kate says.
Then they come to the playground. “Kate, you 28.________ (can / can’t) do sports with your classmates here, but you 29. __________(can’t / don’t have to) take any food here,” Miss Smith says.
“I will remember that,” Kate says.
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can
can't
“Miss Smith!” a girl named Grace calls. “Jim threw（扔）a ball at me!”
“Jim, 30. ___________(don’t / doesn’t) do that. Now you 31. _____________(must / don’t have to) say sorry to Grace,” Miss Smith says. “And you 32. ____________(have to / don’t have to) be sure not to do that again.”
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don't
must
have to
“Sorry, Grace,” Jim says.
It’s time for class. Kate and all her classmates 33. _____________ (can / must) go back to class.
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must
七、前沿科技·DeepSeek 重庆期中 任务型阅读。（8 分）
根据短文内容，完成下面的表格，每空一词。
DeepSeek is a very useful kind of AI. It can do many things to help us in our daily life and study.
When we use DeepSeek to study English, it can give us good advice on grammar（ 语法） and vocabulary（词汇）. But we should not just believe（相信）it. We need to think on
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our own and try to understand by ourselves. For example, if DeepSeek gives us a grammar rule, we should practise using it in different sentences.
When it comes to using DeepSeek for writing a short story, we mustn’t copy（照抄）the whole story. Instead（ 相反）, we can get ideas from it and then use our own ideas to make the story special.
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In online conversation with DeepSeek, we should be friendly and respectful. We can share our feelings about using it, but we shouldn’t put in false information or speak ill of it.
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Situations of Using DeepSeek 34. to Follow
Using it forEnglish study ① Don't just believe it.
②Think on our own and try to understand by ourselves.
③ We should 35. using knowledge(知识).
Rules
practise
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Using it for writing Don't copy the whole story; get ideas
36. it.
In online conversation withDeepSeek Be 37. and respectful; don't put in false information or speak ill of it.
from
friendly

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