人教版初二下英語(yǔ)教案
Lesson 65 ( The first period )
一、Teaching aims and demands.
學(xué)習掌握情態(tài)動(dòng)詞must,的用法;學(xué)習由連詞when引導的時(shí)間狀語(yǔ)從句;學(xué)習由連詞if引導的條件狀語(yǔ)從句。
二、Organization. be omitted.
三、Teaching of new lesson.
1.Listening.
Listen to the tape for Lesson 65. then read after it aloud.
2.Drills.
1) Ask students to make sentences 1.2.
2) 讓師生之間進(jìn)行以下對話(huà)練習:
T: Stop! S: You must stop!
T: Don’t run! S:You mustn’t run.
T: Be more careful! S:You must be more careful!
T: Don’t play on the road!
S:You mustn’t play on the road!
3) 讓學(xué)生以口、筆形式英漢互譯以下句子:
1)You must look after your books. 2)I must ring him this afternoon.
3)You must finish the work in time. 4)She must stay in bed.
5)They must clean the bedroom. 6)I mustn’t be late for class.
7)We mustn’t move anything in the room.
8)You mustn’t touch the things in a shop. 9)He mustn’t leave so early.
10)They mustn’t bring animal here. 11)What must we do after lunch?
12)When must I finish my homework?
13)Who must go to the meeting? 14)Why must we learn English?
15)Where must we go and find the twins?
3.Language points. (用幻燈顯示)
1)You must be more careful! 你應當更加小心!
must,是情態(tài)動(dòng)詞,它的基本意思是“必須、應當”,沒(méi)有詞形變化。與情態(tài)動(dòng)詞can,may一樣,后面跟動(dòng)詞原形。如:
I must go now and he must stay here. 現在我必須走,他應當留在這里。
2)That car nearly hit you. 那輛小汽車(chē)幾乎撞到你。
nearly是副詞,意思是“幾乎,將近”與almost有相同的意思,在句中當狀語(yǔ),放在行為動(dòng)詞前面。hit是動(dòng)詞過(guò)去式。它是及物動(dòng)詞,意思為“撞”、“打”、“擊中”,后面可直接跟賓語(yǔ)表示(擊中)對象。如:
The ball hit the window. 球打到窗戶(hù)上。
3)You mustn’t cross the road. 你不能穿過(guò)馬路。
mustn’t是must的否定式,其意思是“禁止,不許可,一定不要”。帶must的一般疑問(wèn)句,其肯定答語(yǔ)為“Yes, …must”;其否定答語(yǔ)一般用“No,… needn’t.”;needn’t是情態(tài)動(dòng)詞need的否定式,意思是“不需要”,“不必”。要注意must的否定答語(yǔ),不能用它的否定式來(lái)回答,必須用needn’t。又如:
Must I come to school before half past seven?
Yes, you must. No, you needn’t.
Must he finish the work before nine o’clock?
Yes, he must. No, he needn’t.
Must they hand in their exercises today?
Yes, they must. No, they needn’t.
4)If you want to cross a street, you must wait for the green light.
如果你要穿過(guò)街道,你必須等候綠燈。
該句是含有條件狀語(yǔ)從句的復合句。主、從句的時(shí)態(tài)都用一般現在時(shí)。to cross是動(dòng)詞不定式作動(dòng)詞的want賓語(yǔ)。
wait for是“等候”的意思,后面跟某物或某人。如:
Please wait for me at the school gate. 請在校門(mén)口等我。
Look! They are waiting for a bus over there.
瞧!他們正在那邊等到公共汽車(chē)。
5)It’s better to wait and be safe. 安全地等著(zhù)是更好的。
it是形式主語(yǔ),to wait and be safe是動(dòng)詞不定式當真正的主語(yǔ)。safe是dangerous的反義詞;cross是動(dòng)詞謂語(yǔ),意為“過(guò)”、“穿過(guò)”、“越過(guò)”;注意不要與介詞across相混淆,應加以區別。如:
Walk across the street, please. 請步行過(guò)街。
6)You must not cross in front of the traffic. 你不應該在交通燈前面穿過(guò)。
must not可縮寫(xiě)為mustn’t表示“禁止”。后面跟動(dòng)詞原形。in front of是介詞短語(yǔ)。在句中當地點(diǎn)狀語(yǔ)。如:
He sits in front of my seat. 他坐在我座位的前面。
7)If the traffic light is red, you must stop.
如果交通燈是紅色的,你必須停止前進(jìn)。
“If…”在句中引導條件狀語(yǔ)從句;traffic,指交通,是不可數名詞。light作為“燈”解是可數名詞,如果作“光線(xiàn)”解是不可數名詞,沒(méi)有復數形式。如:
The light in the room is very dark. 房間里的光線(xiàn)很暗。
8)When you get off the bus, you mustn’t push others.
當你下車(chē)時(shí),你不應該推別人。
“When…” 是時(shí)間狀語(yǔ)從句,其時(shí)態(tài)是一般現在時(shí),主句的時(shí)態(tài)用一般現在時(shí)。mustn’t是must not的縮寫(xiě)形式。表示“禁止”、“不應該”。如:
We mustn’t talk aloud in class. 在課堂我們不該高聲談話(huà)。
五、Design for exercises.
1.Homework:
熟讀本課里的內容;完成Wb L65 Exx. 1-2.
2.Additional exercises.
課時(shí)作業(yè)設計(用幻燈顯示)
A.按要求改變下列詞形式:
1. hitting(原形) 2. safe(反義詞)
3. cross(過(guò)去式) 4. easily(形容詞)
5. traffic(復數) 6. careful(名詞)
7. please(形容詞) 8. hurt(過(guò)去式)
9. round(同義詞) 10. thin(比較級)
B.漢譯英:
1. 我可以走了? 不,你必須留下。 .
2. 我們必須按時(shí)完成作業(yè)。 .
3. 你不能在馬路上踢足球。 .
4. 我們不應該浪費(waste)時(shí)間。 .
5. 你不應該錯過(guò)這部電視劇,它好極了。 .
6. 我幾乎忘記了你的名字。 .
Key:
A. 1.hit 2.dangerous 3.crossed 4.easy 5.traffics 6.care
7.pleasure 8.hurt 9.around 10.thinner
B. 1.May I go now? No, you must stay. 2.We must finish our homework in time. 3.You mustn’t play football on the road. 4.We mustn’t waste our time. 5.You mustn’t miss the TV play, it is wonderful. 6.I nearly forget your name.