Unit3grammar.ppt

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1、 GrammarGrammarGrammarGrammarModule 2 Science and technologyScience and technologyOxford EnglishUnit 3ComputersWill computers make our lives better?Revision and introductionRevision and introduction1 1 Complete the article.The first computers were _ than cars,but now they are becoming _ and _.Comput

2、ers can calculate at a _ speed than we can.Computers are not _ than human beings,but they may be able to do a _ job than us.In the past,computers were _ expensive,but now they are much _.cheapercheaperclevererclevererfasterfastersmallersmallerbiggerbiggermoremore Grammar A Grammar A The comparative

3、The comparative of adjectivesof adjectives2 2When we compare two people or things,we can use the comparative of adjectives.betterbetterbetterbetter根据观察，你能说说什么是形容词的比较级。形容词的比较级常用来比较两种人或事物.标志词：常见的结构：The first computer were bigger than cars.观察下面 形容词比较级的变化，说说形容词比较级的构成方法thanA+be+形容词比较级+than+BAbe比较级thanBHo

4、w do we form the comparative of adjectives?-erermoremorethanthanThe 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 they may be able to do a _ job than us.In the past,computers were _ expens

5、ive,but now they are much _.cheapercheaperclevererclevererfasterfastersmallersmallerbiggerbiggermoremorebetterbetterbetterbetterthe comparative of adjectives 比较级形式比较级形式例词例词单单音音节节形形容容词词大多数单音节形容词+-erhigh higher small smaller 以-e结尾+-rlarge larger wide wider重读闭音节（辅+元+辅）双写辅音字母，再加-erbig bigger hot hotter双

6、双音音节节形形容容词词以-y或-ly结尾去掉y，再加-ierhappy happiersilly sillier以非重读元音、/l/或/R(r)/结尾+-er(-r)clever cleverersimple simpler以-ful，-less，-ed，-ing,-ous结尾more+形容词原级careful more careful boring more boring多多音音节节形形容容词词含三个或三个以上音节more+形容词原级difficult more difficultpopular more popularmoremore expensiveexpensivelighterli

7、ghterComplete the conversation below and on page 40 with the comparative of the adjectives from the box.heavierheaviersmallersmallerbiggerbigger S1:_,Canada or China?(country/big)S2:_.Which country is biggerCanada is bigger than ChinaAsk and answer questions using the following information.The first

8、 one has been done for you.(country/big)CanadaCanadaChinaChinaWhichis+比较级，A or B?A is 比较级 than B.Hong KongShanghaithe Yellow Riverthe Yangtze RiverHainan IslandTaiwan IslandMountain TaiYellow Mountain(city/big)(river/long)(island/large)(mountain/high)S1:_,Cananda or China?(country/big)S2:_.Which cou

9、ntry is biggerCanada is bigger than ChinaAsk and answer questions using the following information.The first one has been done for you.Whichis+比较级，or?is 比较级 than Which city is bigger，Hong Kong or Shanghai?Shanghai is bigger than Hong Kong.观察：Alex is much thinner than me.This film is far more interest

10、ing than that one.Lucy is even fatter than her sister Lily.比较级前可用much,even,far,a lot,a little,a bit等修饰。The red laptop is the smallest among/of the three.When we compare more than two people or things,we use the superlative of adjectives.Grammar B Grammar B The The superlsuperlative oative of f adjec

11、tives adjectives3 3￥6,000￥4,600￥7,500The red laptop is the smallest among/of the three,but it is _.the most expensive the most expensive How do we form the superlative of adjectives?-estestmostmostthethethe superlative of adjectives最高最高级级形式形式例例词词单单音音节节形容形容词词大多数单音节形容词+-esthigh highest small smallest以

12、-e结尾+-stlarge largest wide widest一个元音+一个辅音双写辅音字母，再加-estbig biggest hot hottest双音双音节节形容形容词词以-y或-ly结尾去掉y，再加-iesthappy happiest silly silliest以非重读元音、/l/或/R(r)/结尾+-est(-st)clever cleverest simple simplest以-ful，-less，-ed，-ing结尾most+形容词原级careful most careful boring most boring多多音音节节形容形容词词含三个或三个以上音节most+形容

13、词原级difficult most difficultpopular most popularDavid: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.a ab bc cB1 David is shopping for a camera.Look at the photos and write the letter of the corr

14、ect model after each statement.(1)_(2)_(3)_Tony: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)_.expensive light old smallsmallestsmallest99.8 mm 99.8 mm x 56.4 mm x 24.5 mmx 56.4 mm x 24.5 mmmost expensivemost e

15、xpensiveoldestoldestlightestlightest3,5893,58920102010170 g170 gB2 David told his friend Tony about his shopping trip.Complete Davids sentences with the superlative of the adjectives from the box.S1:Which is the biggest,the Earth,the Moon or the Sun?S2:The Sun is the biggest.the Earth,the Moon or th

16、e Sun?(big)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)Ask and answer questions using the following information.The first one has been done for you.H HHomework Homework 1.1.熟记形容词的比较级和最高级的构成方式。熟记形容词的比较级和最高级

17、的构成方式。2.2.以以下下各各组组事事物物中中，你你最最喜喜欢欢或或讨讨厌厌哪哪一一个个？请请运运用用所所给给的的含形容词的比较级和最高级的句型陈述理由。含形容词的比较级和最高级的句型陈述理由。3.3.完成完成英英语（八年（八年级 上册）上册）B第第3535至至3737页页GrammarGrammar的的 练习练习。snakesnake，spiderspider，crocodile crocodile dogdog，catcat，bird bird summersummer，winterwinter，spring spring swimmingswimming，dancingdancing，runningrunningbikebike，busbus，the underground the underground I I like/dislike like/dislike because because it it is is than than；I I like/dislike like/dislike because it is the because it is the