八年级英语上册 Unit 3 Computers Grammar课件 .ppt

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1、Period 3,Grammar,Module 2 Science and technology,Oxford English,Unit 3,Computers,Will computers make our lives better?,Revision and introduction,1,Complete the article.,The first computers were _ than cars, but now they are becoming _ and _. Computers can calculate at a _ speed than we can.Computers

2、 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 _.,cheaper,cleverer,faster,smaller,bigger,more,Grammar A The comparative of adjectives,2,When we compare two people or things, we can use the comparative of adjecti

3、ves.,better,better,How do we form the comparative of adjectives?,-er,more,than,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 they may be able to do a _ job than us.In the past, comp

4、uters were _ expensive, but now they are much _.,cheaper,cleverer,faster,smaller,bigger,more,better,better,The small dog runs fast.,The horse runs _ than the small dog.,fast,faster,fastest,The leopard runs _.,faster,the fastest,The cow is _ than the sheep.,The elephant is _ of all.,heavy,heavier,hea

5、viest,The sheep is heavy.,heavier,the heaviest,Jim is strong.Li Lei is . Tom is .,stronger,the strongest,Exercise,The blue car is nice.The red car is the blue car.(红车比蓝车好看）The colourful car is of all.（彩色车最好看）,nicer than,the nicest,How do you like these Christmas trees?,1 2 3,The first Christmas tree

6、 is beautiful.,The second one is _than the first one.,The third one is _of the three.,more beautiful,the most beautiful,￥ 500.00,￥ 1000.00,￥ 1500.00,The green bag is expensive.The white one is _ _ than the green one.The purple bag is _one of all the bags.,more expensive,the most expensive,形容词和副词比较级和

7、最高级的规则变化：,规则变化,一般在词尾加-er 或-est,shorter,the shortest,以字母e结尾的单词后加-r 或-st,finer,the finest,heavier,the heaviest,以“辅音字母+y”变y为i,再加-er或-est,short,fine,heavy,bigger,bigthinhot,the thinnest,thinner,the biggest,hotter,the hottest,以辅+元+辅结尾的，双写尾字母，再加-er/ -est,长的形容词 多音节或少数双音节形容词，在词前more/ most,expensivebeautiful

8、useful,the mostexpensivethe mostbeautifulthe most useful,moreexpensivemorebeautifulmore useful,1. large _ _ 2. nice _ _ 3. dry _ _ 4. thin _ _5.clever_ _ 6. happy_ _ 7. heavy_ _ 8.fat _ _9.politely_ _10. early _ _ 11. beautiful _ _12. quickly _ _ 13. interesting_ _14. excited _ _,larger the largest,

9、nicer the nicest,drier the driest,thinner the thinnest,cleverer the cleverest,happier the happiest,heavier the heaviest,fatter the fattest,more the most ,more beautiful,the most beautiful,Lets do it!,写出比较级和最高级,more quickly the most quickly,more interesting the most interesting,more excited the most

10、excited,earlier the earilest,这个箱子比那个箱子重。This box is _ that one.,2. 你的电脑比我的大。Your computer is _mine.,heavier than,bigger than,3. 长江比黄河长。The Yangtze River is _ _ the Yellow River.,longer than,4. 这个故事没有那个有趣。This story is _ _ _ that one.,less interesting than,Fill the blanks.,A + 谓语 + 比较级 + than +B,Conc

11、lusion：比较级的句子结构：,Oral Translation,1你认为英语比数学简单吗? Do you think English is easier than math?2 这个相机比那个相机贵。This camera is more expensive than that one.3 玛丽比吉姆学习努力。Mary studies harder than Jim.4 我比我姐姐跳得远。I jumped farther than my sister,A + 谓语 + 比较级 + than +B,Lets play a game: 开火车,You must compare yourself

12、 with someone in our class. (e.g age, height, weight, hair length) or other things (e.g book, watch, pen, school bag ) 如果你们组有任何人掉链，都会被扣掉一个A。整组都接上，将会得到4A.eg: Im fatter than ,more expensive,lighter,Complete the conversation below and on page 40 with the comparative of the adjectives from the box.,heav

13、ier,smaller,bigger,S1: _, Canada or China? (country/big)S2: _.,Ask and answer questions using the following information. The first one has been done for you.,(country/big),CanadaChina,(city/big),(river/long),(island/large),(mountain/high),S1: _,Cananda or China? (country/big)S2: _.,Ask and answer qu

14、estions using the following information. The first one has been done for you.,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 The superlative of adjectives,3,The red laptop is the smallest among/of the

15、 three,but it is _.,the most expensive,How do we form the superlative of adjectives?,-est,most,the,The dog is _ _the mouse.,The horse is _ _ _ all.,The boy is _ _the man.,The baby is _ _ the three.,big,bigger,biggest,young younger,youngest,bigger than,the biggest of,younger than,the youngest of,Jim,

16、Li Lei,Tom,Li Lei is _ _Tom.,Jim is _ _ _our class.,￥30,￥20,￥10,The yellow coat is _ _the purple one.,The brown coat is _ _ _ the three.,taller than,the tallest in,cheaper than,the cheapest of,Conclusion,The horse is the biggest of all.The baby is the youngest of the three.The brown coat is the chea

17、pest of the three.Jim is the tallest in our class.,主语 + be + the + 最高级 + of / in,形容词最高级句式的结构：,注意：形容词最高级前一定要用the.最高级后面可用in, of等短语来说明比较围。,the superlative of adjectives,The dog is _ _the mouse.,The horse is _ _ _ all.,The boy is _ _the man.,The baby is _ _ the three.,big,bigger,biggest,young younger,yo

18、ungest,bigger than,the biggest of,younger than,the youngest of,Jim,Li Lei,Tom,Li Lei is _ _Tom.,Jim is _ _ _our class.,￥30,￥20,￥10,The yellow coat is _ _the purple one.,The brown coat is _ _ _ the three.,taller than,the tallest in,cheaper than,the cheapest of,David: Id like to see some of your camer

19、as.Salesman: Certainly. This is the most expensive model. This is the cheapest model. This is the newest and lightest model.,a,b,c,B1 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?Da

20、vid: 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 small,smallest,99.8 mm x 56.4 mm x 24.5 mm,most expensive,oldest,lightest,3,589,2010,170 g,B2 David told his friend Tony about his shopping trip. Complete Davids

21、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 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 s

22、paceship, a plane or a train? (fast),Ask and answer questions using the following information. The first one has been done for you.,More practiseMy sister is _ than Richard. (old)Is football _ than volleyball? (exciting)I think she looks _ than in the photo. (pretty) Can you walk _ than a young man?

23、 (far) In summer it is much _ in Wuhan than in Beijing. (hot)Tom is _ boy in our class. (old),older,more exciting,prettier,farther,hotter,the oldest,7. It was the _ day of his life. (bad)8. Which is _, Room 201 or Room 108? (bright)9. We watched a very _ play the day before yesterday. (bore)10. Sue

24、is _ of the girls in the class. (clever) She answered all the questions except _ one. (difficult)11. Winter is _ than autumn; it is _ of the four seasons. (cold),worst,the cleverest,the most difficult,colder the coldest,brighter,boring,Mikes family picture,Mikes father is the fattest in the family.

25、Mikes mother is the most careful. And Mike is the most interesting of all.,模仿上文，写一篇短文描述你的家庭成员。尽可能多用不同的形容词最高级 (old, tall, fat, thin, strong, careful, careless, hardworking, funny),课后练习,1.D2.A3.B4.B5.C6.C7.D8.B9.D10.B,11.B12.C13.B14.A15.A16.B17.C18.B19.C20.C,填空,1.easier2.cleaner3.larger4.the oldest5.more useful6.best7. the most interested8.more different9.the greatest10. more beautiful,