人教英语必修2教案:unit3《computer—warming up and reading》(2)

2020-06-10 09:28

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III. Reading

1. Listening and reading to the recording of the text WHO AM I?

Turn to page 18 and listen and read to the recording of the text. Pay attention to the pauses, pronunciation and intonation of the native reader. 2. Reading aloud and underlining expressions

Now we are to read the text once again and underline all the expressions in the text. Put them down into your notebook after class as homework. Collocations from WHO AM I? begin as…, a calculating machine, be built as…, at that time, a technological revolution, the start of artificial intelligence, write a book, be made to work, solve problems, from then on , grow any larger, As time went by, go back to…,be made smaller, memory became so large, stand there by oneself, be connected by…, share knowledge with others through…, be put into…, provide humans with…, deal with…, truly filled with… 3. Reading, identifying and settling

Attention, please! It is time to skim the text one more time and identify the difficult sentences. Try analyzing the structures of the difficult sentences and discuss them among your group members. You may also put your questions to me for help. Chat (online)(在线)聊天 To chat is to talk about ordinary things that are not very important. You can chat to one person or to many people. People also use this word now for parts of the Internet where we can talk with many different people at the same time. Usually, you chat on the internet in a chat room or messaging service like AOL(American On-Line) Instant Messenger (AIM), Yahoo Messenger, or 第 6 页 共 17 页

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MSN Messenger. IV. Comprehending

1.

Scan the text for information to complete the table below, describing the development of computer.

The computer began as a calculating machine. In 1642 In 1822 The analytical machine was made by Charles Babbage. In 1936 The computer grew rapidly both in size and in brainpower. 1940s The computer had grown as large as a room. In 1960s The first family of computer was connected to each other. In 1970s Computers were used in offices and homes. Now Computers connect people all over the world Together. 2. Read the text again and complete the chart below.

Paragraph 1 Paragraph 2 Paragraph 3 Topic sentence Over time I have These changes only Since the 1970s been changed quite became possible many new applications a lot. as my memory have been found for me. improved. Supporting details ? ? ? ? ? Calculating machine Analytical machine Universal machine PC laptop ? ? ? ? ? tubes transistors chips network world wide web ? ? ? ? ? ? ? communications finance trade robots mobile phones space rockets providing a life of 第 7 页 共 17 页

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high quality

Period 2: Learning about Language

Teaching Aims:

To learn to use The Present Perfect Passive Voice To discover useful words and expression To discover useful structures

Procedures

I. Warming up by reading to the tape

To begin with, turn to page 18, listening to and reading to the recording of the text WHO AM I? Attention goes to the pauses and intonation, as well as the pronunciation of the reader.

II. Discovering useful words and expressions

In pairs do the exercises 1, 2 and 3 on pages 20. You must finish them in 10 minutes. III. Learning about grammar 1. Passive Voice—Overview Tense or Model Simple Present Simple past Passive Sentence The TOEFL exam is given every six months. The TOEFL exam was given last month. 第 8 页 共 17 页

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Simple Future The TOEFL exam this year will be given on October15. Present Continuous The TOEFL exam is being given every year. Present perfect Past perfect Simple Modal Past Modal The TOEFL exam has been given every year since 1950. The TOEFL exam had been given before the Vietnam War occurred. The TOEFL exam should be given to every Foreign student. The TOEFL exam should have been given to all to enter US colleges. 2. The Present Perfect Passive Voice

The structure of The Present Perfect Passive Voice is: have/ has + been+~ed IV. Reading aloud and discovering

Now go back to page 18 to read aloud and discover in the text examples of The Present Perfect Passive Voice.

…as a laptop, I have been used in offices and homes since the 1970s. Since the 1970s many new applications have been found for me. V. Discovering useful structure

We shall do grammar exercises 1, 2 and 3 on page 21.

VI. Closing down by doing a quiz

Correct the mistakes in these passive voice sentences

Example: The house was build in 1880. (correct = The house was built in 1880.) 1. 3000 employees were laying off. 2. A story will made up.

3. An idea was putted forward for discussion. 4. Has the book been give back to you yet?

5. My bank loan will be payed off in five years time. 6. Nothing can be hold against me.

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7. Our allies will be lend support. 8. She has never heard of.

9. She was being knocked down by a bus. 10. She was letted off with a fine.

11. The candle was blow out by the draught. 12. The criminal were locked up.

13. The flood water was be kept back by barriers. 14. The inconvenience will made up for by this money. 15. The keys must have been being left behind. 16. The old cinema is being pull down.

17. The protesters being held back by the police. 18. The road was blocking off.

19. Thirty more people were laid off last week. 20. Your jacket can be hanged up over there.

Period 3: Using Language

Teaching Aims:

To discuss about IT To write a report about IT To read about androids or robots

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