资源简介

(共25张PPT)
Grammar Focus
Unit 2 No Rules, No order
人教2024秋季版7年级英语（下册）
Stand up.
Sit down.
Take a seat.
Open your book.
Raise your hands.
Clap your hands.
Use your pen.
I say, you do.
Game Time (Lead-in)
Look at the blackboard
学 习 目 标
1.观察、理解并归纳祈使句的句式结构、表意功能和用法。
2.理解区分情态动词can,must,have to的用法，在具体语境中正确灵活使用。
3.培养学生的观察和总结能力、分析问题的能力，培养良好的英语学习习惯。
Walk in the hallways. 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,but we have to eat in the dining hall.
3a-Read the sentences. Do the verbs in red need to change forms Why
祈使句
（肯定式）
祈使句
（否定式）
Can,must,have to 属于什么动词？
情态动词
英语句子按照用途可分为陈述句、疑问句、祈使句和感叹句四类。
1.祈使句一般用来表示请求、命令、劝说、号召、警告等。2.祈使句的主语一般是第二人称you，但往往省略。
3.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。
4.句末标点符号：用感叹号或句号。
5.读降调。
深入学习祈使句(Imperative Sentence)
1.Turn off the TV, please.
请关上电视--请求
2.Go and wash your hands.
去洗手--命令
3.Let's play basketball.
我们去打篮球吧！--建议
4.Be kind to your classmates.
对同学要友好--叮嘱
5.Have a good day!
过个愉快的一天--祝愿
6.No smoking!
禁止吸烟--禁止
思考：祈使句可以表达哪些情感呢？
肯定祈使句
否定祈使句
1. 以行为动词原形开头，简称Do型 e.g. Come here.
2. 以动词be开头，简称Be型
e.g. Be quiet, please.
3. 以Let开头，简称Let型
e.g. Let’s go!
e.g.Don’t play computer games.
e.g.Don’t be late again.
e.g.No photos.
No swimming.
1.Don’t +动词原形+宾语 +其他.
3.No + n./v.-ing.
2.Don’t + be +其他.
祈使句的类型及具体用法
肯定：动词原形+宾语 +其它成分
否定：在句首加don’t。
1.Do型祈使句
Come in!
Don't come in!
肯定： Be+表语 (名词或形容词) + 其它成分
否定： 句首加don’t。
Be quite in the library.
Don’t be late for class.
2.Be型祈使句
祈使句的类型及具体用法
肯定： Let +宾语+动词原形 +其它成分
否定： Don't let +宾语+动词原形 +其它成分
Let +宾语+not+动词原形 +其它成分
Don't let him go.
Let's not go there.
Let's go!
常用于第一人称和第三人称，表示建议和劝说等。
祈使句的类型及具体用法
3.Let型祈使句
注意：
“No+名词/动词 ing形式”表示禁止或规劝，常用于公共场所。
No photos! 禁止拍照！
No smoking！ 禁止吸烟！
为表示礼貌，祈使句经常在句首或句末加please。
句末用please时，前面通常加逗号。
e.g. Go this way, please. 请这边走。
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。
1.在形式上，情态动词一般没有人称和数的变化。
2.有的情态动词没有时态的变化，如must。
3.情态动词本身不能单独作谓语，必须和动词原形连用。
常见的情态动词有can、may、must、have to、should、would等。
情态动词（Modal verbs）学习
1.肯定句:
主语+can+动词原形+其他.
2.否定句：
主语+can not/can’t+动词原形+其他.
3.疑问句:
Can+主语+动词原形+其他
肯定回答：Yes, 主语+can.
否定回答：No, 主语+can’t.
情态动词can
1. 表示能力。
2. 表示许可。
3. 表示请求。
We can speak a little English.
We can’t run in the hallways.
Can you help me with my Chinese
could也可表示请求，但比can的语气更委婉。
e.g. Could you tell him to call me back
情态动词can/could
1.肯定句:
主语+must+动词原形+其他.
2.否定句：
主语+must not/mustn’t+动词原形+其他.
3.疑问句:
Must+I+动词原形+其他
肯定回答：Yes, you must.
否定回答：No, you needn’t/don't have to.
情态动词must
2.We must help others when they are in trouble .
当别人有困难时我们必须要帮助他们（责任感的驱使,主观上必须做）
例句：1.He has to stay here because it's raining.
因为下雨，他不得不呆在这。(受客观因素的影响)
情态动词 must & have to
1.must通常表示的是说话人的主观看法，语气比较强烈。
have to往往强调客观需要。
2.否定含义大不相同。mustn't表示“不准；禁止”，
don't have to表示“不必”。
用法总结：
情态动词 must & have to
3b-Complete the sentences using can, have to / must, or can't / mustn't.
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 is bad for him!
3. A: Can I leave the class if I don’t feel well
B: Yes, but you ______________ tell your teacher about it when you _____________ be absent from class.
4. A: Hey! Can I look at your book 缺席；不在
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
can
can't
must / have to
have to
must / have to
must / have to
插队
系好安全带
等待
3c--Look at the first sign and read the rules.
Then write rules for the other signs.
3d-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.
Eg:In the library, we must keep quiet. We mustn’t make noise. We can’t…
eg:Make rules for the computer room in your school.
Computer Room Rules
1.___________________________
2.___________________________
3.___________________________
4.___________________________
5._____________________
We must be quiet in the computer room.
Don’t eat or drink in the computer room.
Don't run in the computer room.
Wear slippers in the computer room.
Clean the computer room every day.
Suggested answers:
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.
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!
Complete the sentences using can, have to / must, or can't / mustn' t.
have to/must
have to/must
have to/must
have to/must
have to/must
can't
can
1. 因为自行车坏了，他不得不步行去那里。
2.你今天不必早起。
3.我们必须做点什么来保护地球。
4.你不准那样跟你妈妈说话
Anawers:1.He has to go there on foot because his bike is broken.
2.You don’t have to get up early today.
3.We must do something to protect the earth.
4.You mustn’t talk to your mother like that.
Ｔｒａｎｓｌａｔｅ　ｔｈｅｓｅ　ｓｅｎｔｅｎｃｅｓ．
1.Review Grammar Focus.
2.Preview Section B ,study the new words and read
Alice's letter.
3.Make a poster about your family rules.
Homework

展开更多......

收起↑