约1360字。

　　Unit 3 Computers
　　Period 2  Learning about Language
　　The 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 Present 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 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 Revision
　　T：Boys and girls，in last period we learned something 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.In 1936，Alan Turing，the real father of computers，wrote a book to describe how computers could be made to worilt 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 size 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 people’s homes.Now computers have been used by billions of people to deal with information and communicate with each other around the world by the Internet.
　　T：Congratulations!You’ve done very well.Now try to do the same to your partners，OK!
　　Step 2 Words and Expressions
　　Task 1
　　T：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 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  totally  truly  simple-minded  Anyway  deal with
　　Task 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 competition 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 concert.
　　Task 4
　　T：Please turn to Page 56 and let’s 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 answers：
　　1.floppy disc  2.hard disc  3.scanner  4.modem  5.CD-ROM  6.monitor  7.keyboard  8.printer
　　Task 5