8Aunit3grammar

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1、 1.Master the usage of the comparative and superlative of adjectives 2.to raise the students ability to sum up some language rulesLead-in The first computers were _ than cars,but now they are becoming _ and _.Computers can calculate at a _ speed than we can.Computers are not _ than human beings,but

2、they may be able to do a _ job than us.In the past,computers were _ expensive,but now they are much _.How do we form the comparative of adjectives?Complete the conversation below and on page 40 with the comparative of the adjectives from the box.The red laptop is the smallest among/of the three.When

3、 we compare more than two people or things,we use the superlative of adjectives.￥6,000￥4,600￥7,500The red laptop is the smallest among/of the three,but it is _.How do we form the superlative of adjectives?-B1 David is shopping for a camera.Look at the photos and write the letter of the correct model

4、 after each statement.David:Id like to see some of your cameras.Salesman:Certainly.This is the most expensive model.This is the cheapest model.This is the newest and lightest model._acbDavid told his friend Tony about his shopping trip.Complete Davids sentences with the superlative of the adjectives

5、 from the box.expensive light old smallTony:Did they show you any cameras?David:Yes.The(1)_model is (2)_.The(3)_model costs(4)_.The(5)_model was made in(6)_.The(7)_model weighs(8)_.Ask and answer questions using the following information.The example was given for you.the Earth,the Moon or the Sun?(b

6、ig)a bee,a butterfly or an ant?(small)iron,silver or gold?(valuable)a bear,a whale or an elephant?(heavy)a spaceship,a plane or a train?(fast)S1:Which is the biggest,the Earth,the Moon or the Sun?S2:The Sun is the biggest.1.We often add-er to short adjectives and use more with long adjectives2.We of

7、ten use than after the comparative of adjectives.3.We often add-est to short adjectives and use most with long adjectives4.We often use the in front of the superlative of adjectives.1.I get further understanding of the grammar.2.I know the important and difficult points in the text.3.I can use them properly.Self-assessment Homework1.Review the rules of comparative and superlative of adjectives and the examples.2.finish the grammar exercise.