人教版高中英语 必修二(Unit3 Computers--Period2 Learning about Language)

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1、Period 2 Learning about LanguageThe General Idea of This Period:This period includes revision of the text、learning about language.From this period the students will learn how to use some of the key words and expressions in the text and do some exercises for consolidation,and learn how to use the Pre

2、sent Perfect Passive Voice.Teaching Aims:1.Help the students to learn to use some useful words and expressions.2.Enable the students to learn how to use the present perfect passive voice.Teaching Important Point:The use of the present perfect passive voice.Teaching Difficult Points:How to master the

3、 usages of some important words and phrases and the Present Perfect Passive Voice.Teaching Methods:1.Task-based learning.2.Cooperative learning.3.Explanation and practice.Teaching Aids:1.A tape recorder.2.A multimedia.Teaching Procedures:Step 1 RevisionT:Boys and girls,in last period we learned some

4、thing about the history and development of computers.Now who would like to retell the text with the help of these figures?S1:Let me try.In 1642,a calculating machine was used in France.Then in 1922,the Analytical Machine was made by Charles Babbage.It could follow instructions from cards with holes.

5、In 1936,Alan Turing,the real father of computers,wrote a book to describe how computers could be made to work and built a “universal machine” to solve any mathematical problem.Later,people discovered the computer had “artificial intelligence”.In the 1960s,the computer got his new transistors.Its siz

6、e was totally changes at that time.And in the early 1960s,the first family of computers were connected to each other.In 1970s,computers have brought into peoples homes.Now computers have been used by billions of people to deal with information and communicate with each other around the world by the

7、Internet.T:Congratulations!Youve done very well.Now try to do the same to your partners,OK! Step 2 Words and ExpressionsTask 1T:Please turn to Page 19 and finish Discovering Useful Words and Expressions.At first,look at Ex.1.From the reading passage,find the words and expressions with the following

8、meanings.Now,ten students will be asked to give the words.Who can?Volunteers!Check the answers together.Task 2.T:Well done.Now please look at Ex 2.and complete the passage with some of the words above.Pay attention to the use and the forms of those words.The possible answers:network so that went by

9、totally truly simple-minded Anyway deal withTask 3 T:Please finish Ex.3.Look at the sentences on Page 20.Tick the right word.Then some of you will be asked to read the sentences one by one.The possible answers:1.Life totally changed when I went to university. 2.I was amazed to find that I won the co

10、mpetition to design a new computer.3.The competition was so exciting that we cheered all evening.4.I was so excited at the thought of meeting Yang Liwei that I could not sleep.5.Robots can be bought so cheaply that I gave one to each of my friends.6.It was so unlucky that you lost your watch at the

11、concert.Task 4T:Please turn to Page 56 and lets finish Using Words and Expressions.First look at Ex.1.Read through the words in the right-hand box below.Use some of them to name each part of a computer in the left-hand box.We have known about computer.But who can give us the exact names?The possible

12、 answers:1.floppy disc 2.hard disc 3.scanner 4.modem 5.CD-ROM 6.monitor 7.keyboard 8.printerTask 5T:Now please look at Ex.2.Complete the sentences with some of the words in the right-hand box above.You can use each word only once.First do the exercise individually,and then check your answers with yo

13、ur partners.And last seven students will be asked to report their answers to the class.The possible answers:1.A printer is a machine for printing text or pictures onto paper,especially once connected to a computer.2.A CD-ROM or disk is the main device that a computer uses to store information.3.A mo

14、nitor is used to see your data on a computer. 4.A keyboard is used to put data into a computer.5.A CPU is often used to connect computers to each other through phone lines.6.Data can also be stored in a floppy disc,which is small and can be carried easily.7.A hard disc is a disc that contains comput

15、er data.It can store a large amount of data.Step 3 GrammarThe Present Perfect Passive VoiceT:Boys and girls,now please pay attention to the following sentences in the text:1.As the years have gone by,I have been made smaller and smaller.2.Since then,my family and I have been used by billions of peop

16、le to deal with information and communicate with each other around the world by the Internet.3.I have truly been built to serve the human race since my birth.T:What verb tense is used in these sentences?And what verb voice is used in these sentences?Yes,the present perfect passive voice is used in these sentences.Can you tell us the structure of the p

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