九年级英语---第九单元---第一课时教案.doc

Unit 9 when was it invented?

Period 1

I. Teaching Aims and Demands
1. Knowledge Objects
(1)Key Vocabulary
Invent calculator
(2)Target Language
When was the telephone invented?
I think it was invented in 1876.
2. Ability Objects
(1)Teach students to use the new words.
(2)Train students to talk about the history of inventions
II. Teaching key Points.
1. Key Vocabulary
2. Target Language
III. Teaching Difficult Points
1. Train students to talk about the history of inventions.
2. Train students to understand the target Language in spoken conversation.

IV. Teaching Procedures
Step I Revision
Review the passive voice.
Step II lead-in
Use four famous inventions in ancient china lead into this class.
StepⅢ 1a
1. Look at the pictures and answer my questions.
Picture 1: T: What’s this in English?
Ss: It’s a computer.
Picture 2: T: What’s this in English?
Ss: It’s a car.
Picture 3: T: What’s this in English?
Ss: It’s a calculator
Picture 4: It’s a telephone.
Picture 5: It’s a TV set
2. Write the sentence “When was the computer invented?” on the blackboard. Ask the class to repeat the question.
T: When was the computer invented? / car / calculator/ telephone/ TV set.
Ss: It was invented in 1976 / 1885 / 1971 / 1876 / 1927.
Ask the Ss to repeat the conversation.
III. Good. Now answer my questions.
T: Which invention do you think is the oldest one?
Ss: I think It’s……
T: Which invention do you think is the newest one?
Ss: I think It’s……
3 Have students look at the example conversation in the box. Ask two students to read this conversation to the class. Have students read the conversation several times, Say. Now talk about the five inventions in groups, using the sample conversation as a model. Ask several groups to tell the class their answers.
Step Ⅳ 1b
I. Ask a student to say the name of the five inventions.
II. Say: We’ll listen to a girl and a woman talking about the five inventions. They will talk about when they were invented. Listen carefully and match the inventions with the dates. Write the correct letter in front of each date as the model, play the tape twice.
Step Ⅴ
1. Ask a pair of students to read this conversation to the class
SA: When was the telephone invented?
SB: It was invented in 1876
2. Get students to practice in pairs, using the information in Activity 1b.
Step Ⅵ Summary
In this class we’re learned the target language.
When was the calculator invented?
It was invented in 19771.
在这两个句子里“was invented”是被动语态过去时。
1．在英语动词有两种语态：主动语态，被动语态。
主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。
2．被动语态的构成：助动词be+及物动词的过去分词
3．被动语态的过去时：was/were+及物动词的过去分词。
Step Ⅶ. Homework
1. Write out two conversations in Activity 1a.
2. Write out two conversations in Activity 1c.
Step Ⅷ Bb design

Unit 9 when was it invented?
Section A
The first period
1. The names of the five inventions:
Computer, car, calculator, telephone, TV set
2. Target language:
A：When was the telephone invented?
B: I think it was invented in 1876.

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