資源簡介

(共25張PPT)
Grammar Focus
Unit 2 No Rules, No order
人教2024秋季版7年級英語（下冊）
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
學 習 目 標
1.觀察、理解并歸納祈使句的句式結構、表意功能和用法。
2.理解區分情態動詞can,must,have to的用法，在具體語境中正確靈活使用。
3.培養學生的觀察和總結能力、分析問題的能力，培養良好的英語學習習慣。
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 屬于什么動詞？
情態動詞
英語句子按照用途可分為陳述句、疑問句、祈使句和感嘆句四類。
1.祈使句一般用來表示請求、命令、勸說、號召、警告等。2.祈使句的主語一般是第二人稱you，但往往省略。
3.祈使句的肯定式以動詞原形開頭，否定式在動詞原形前加don’t。
4.句末標點符號：用感嘆號或句號。
5.讀降調。
深入學習祈使句(Imperative Sentence)
1.Turn off the TV, please.
請關上電視--請求
2.Go and wash your hands.
去洗手--命令
3.Let's play basketball.
我們去打籃球吧！--建議
4.Be kind to your classmates.
對同學要友好--叮囑
5.Have a good day!
過個愉快的一天--祝愿
6.No smoking!
禁止吸煙--禁止
思考：祈使句可以表達哪些情感呢？
肯定祈使句
否定祈使句
1. 以行為動詞原形開頭，簡稱Do型 e.g. Come here.
2. 以動詞be開頭，簡稱Be型
e.g. Be quiet, please.
3. 以Let開頭，簡稱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 +動詞原形+賓語 +其他.
3.No + n./v.-ing.
2.Don’t + be +其他.
祈使句的類型及具體用法
肯定：動詞原形+賓語 +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+表語 (名詞或形容詞) + 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
祈使句的類型及具體用法
肯定： Let +賓語+動詞原形 +其它成分
否定： Don't let +賓語+動詞原形 +其它成分
Let +賓語+not+動詞原形 +其它成分
Don't let him go.
Let's not go there.
Let's go!
常用于第一人稱和第三人稱，表示建議和勸說等。
祈使句的類型及具體用法
3.Let型祈使句
注意：
“No+名詞/動詞 ing形式”表示禁止或規勸，常用于公共場所。
No photos! 禁止拍照！
No smoking！ 禁止吸煙！
為表示禮貌，祈使句經常在句首或句末加please。
句末用please時，前面通常加逗號。
e.g. Go this way, please. 請這邊走。
情態動詞表示說話人的語氣和情態，如請求、許可、意愿、可能等。
1.在形式上，情態動詞一般沒有人稱和數的變化。
2.有的情態動詞沒有時態的變化，如must。
3.情態動詞本身不能單獨作謂語，必須和動詞原形連用。
常見的情態動詞有can、may、must、have to、should、would等。
情態動詞（Modal verbs）學習
1.肯定句:
主語+can+動詞原形+其他.
2.否定句：
主語+can not/can’t+動詞原形+其他.
3.疑問句:
Can+主語+動詞原形+其他
肯定回答：Yes, 主語+can.
否定回答：No, 主語+can’t.
情態動詞can
1. 表示能力。
2. 表示許可。
3. 表示請求。
We can speak a little English.
We can’t run in the hallways.
Can you help me with my Chinese
could也可表示請求，但比can的語氣更委婉。
e.g. Could you tell him to call me back
情態動詞can/could
1.肯定句:
主語+must+動詞原形+其他.
2.否定句：
主語+must not/mustn’t+動詞原形+其他.
3.疑問句:
Must+I+動詞原形+其他
肯定回答：Yes, you must.
否定回答：No, you needn’t/don't have to.
情態動詞must
2.We must help others when they are in trouble .
當別人有困難時我們必須要幫助他們（責任感的驅使,主觀上必須做）
例句：1.He has to stay here because it's raining.
因為下雨，他不得不呆在這。(受客觀因素的影響)
情態動詞 must & have to
1.must通常表示的是說話人的主觀看法，語氣比較強烈。
have to往往強調客觀需要。
2.否定含義大不相同。mustn't表示“不準；禁止”，
don't have to表示“不必”。
用法總結：
情態動詞 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
插隊
系好安全帶
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. 因為自行車壞了，他不得不步行去那里。
2.你今天不必早起。
3.我們必須做點什么來保護地球。
4.你不準那樣跟你媽媽說話
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

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