新沪教牛津版八年级上册英语 Unit 3 period 4 教学课件

1、Module 2 Science and technologyUnit 3 putersPeriod 4Period 4 Grammar学习目标1 学习使用形容词的比较等级比较事物。2 能够准确地使用形容词的比较级和最高级对事物进行比较。3 培养归纳语法规则的能力和交流过程中的合作精神。 Will puters make our lives better?Revision and introduction plete the article.The first puters were _ than cars, but now they are be ing _ and _. Computers

2、 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 _. cheaperclevererfastersmallerbiggermore Grammar A The parative of adjectivesWhen we pare two people or things, we

3、 can use the parative of adjectives. betterbetterHow do we form the parative of adjectives?The first puters were _ than cars, but now they are be ing _ 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 pas

4、t, computers were _ expensive, but now they are much _. cheaperclevererfastersmallerbiggermorebetterbetter-ermorethanthe parative of adjectives 比较级形式例词单音节形容词大多数单音节形容词+ -erhigh higher small smaller 以-e结尾+ -rlarge larger wide wider一个元音 + 一个辅音双写辅音字母，再加-erbig bigger hot hotter双音节形容词以-y或-ly结尾去掉y，再加-ierha

5、ppy happiersilly sillier以非重读元音、/l/或/R(r)/结尾+ -er(-r)clever cleverersimple simpler以-ful，-less，-ed，-ing结尾more + 形容词原级careful more careful boring more boring多音节形容词含三个或三个以上音节more + 形容词原级difficult more difficultpopular more popularmore expensivelighter plete the conversation below and on page 40 with the

6、 parative of the adjectives from the box.heaviersmallerbigger S1: _, Canada or China? (country/big)S2: _.Which country is biggerCanada is bigger than ChinaAsk and answer questions using the following information. The first one has been done for you.(country/big)CanadaChinaHong KongShanghaithe Yellow

7、 Riverthe Yangtze RiverHainan IslandTaiwan IslandMountain TaiYellow Mountain(city/big) (river/long) (island/large) (mountain/high)S1: _,Cananda or China? (country/big)S2: _.Which country is biggerCanada is bigger than ChinaAsk and answer questions using the following information. The first one has b

8、een done for you.The red laptop is the smallest among/of the three.When we pare more than two people or things, we use the superlative of adjectives. Grammar B The superlative of adjectives￥6,000￥4,600￥7,500The red laptop is the smallest among/of the three,but it is _. the most expensive How do we f

9、orm the superlative of adjectives?-estmostthethe superlative of adjectives最高级形式例词单音节形容词大多数单音节形容词+ -esthigh highest small smallest以-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双音节形容词以-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)clev

10、er cleverest simple simplest以-ful，-less，-ed，-ing结尾most + 形容词原级careful most careful boring most boring多音节形容词含三个或三个以上音节most + 形容词原级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. T

11、his is the newest and lightest model. abcB1 David is shopping for a camera. Look at the photos and write the letter of the correct 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)_. T

12、he (7)_model weighs (8)_.expensive light old smallsmallest99.8 mm x 56.4 mm x 24.5 mmmost expensiveoldestlightest3,5892010170 gB2 David told his friend Tony about his shopping trip. plete Davids sentences with the superlative of the adjectives from the box.S1: Which is the biggest, the Earth, the Mo

13、on or the Sun?S2: The Sun is the biggest.the Earth, the Moon or the 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.Homework 熟记形容词的比较级和最高级的构成方式。 以下各组事物中，你最