初二下unit7.ppt

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1、形容词和副词三个等级：1、原级，即原形、原级，即原形2、比较级，表示、比较级，表示“更更”3、最高级，表示、最高级，表示“最最”什么时候用？什么时候用？规则变化规则变化不规则变化不规则变化比较级词和最高级词的构成：1、规则变化 原级原级 比较级比较级 最高级最高级 long longer longest big bigger biggest high higher highest deep deeper deepest 一般在词尾加一般在词尾加-er:-est:1、规则变化原级原级 比较级比较级 最高级最高级fine finer finestlate later latestcute cute

2、r cutest以以e结尾的，结尾的，加加 r 或或-st:1、规则变化原级原级 比较级比较级 最高级最高级big bigger biggestthin thinner thinnestfat fatter fattest双写最后字母，双写最后字母，再加再加 er 或或-est:1、规则变化原级原级 比较级比较级 最高级最高级easy easier easiestfunny funnier funniestearly earlier earliestheavy heavier heaviest以以“辅音字母辅音字母+y”结尾的双音节词，结尾的双音节词，改改“y”为为“i”，再加，再加 er 或

3、或-est:疑问：shyshyest？（单音节词）1、规则变化原级原级 比较级比较级最高级最高级beautiful more beautiful most beautifulinteresting more interesting most interestingpopular more popular most popularserious more serious most serious多音节词前加多音节词前加 more 或或 most:2、不规则变化原级原级比较级比较级最高级最高级good/wellbetterbestbad/badlyworseworstmany/muchmoremo

4、stlittlelessleastfarfartherfurtherfarthestfurthestLets practice!New wordssquaremeterdeepdesertQomolangmathe Nilethe Caspian Seathe Sahara平方；正方形平方；正方形米米(=metre)深的深的沙漠沙漠珠穆朗玛峰珠穆朗玛峰尼罗河尼罗河里海里海撒哈拉沙漠撒哈拉沙漠New wordspopulationAsiafeel freetourtouristwallamazingancient人口数量人口数量亚洲亚洲随便（做某事）随便（做某事）（名（名&动）旅行动）旅行旅行者

5、旅行者墙墙令人惊奇的令人惊奇的古老的古老的New wordsprotectwideas far as I knowman-madethe Yangtze Riverthe Yellow Riverthe Ming Dynastythe Ming Great Wall保护保护宽的宽的据我所知据我所知人造的人造的长江长江黄河黄河明朝明朝明长城明长城Qomolangmathe Nilethe Caspian Seathe SaharaQomolangma is eight thousand eight hundred and forty-four point four three(8,844.43)

6、kilometers long.The Sahara is about nine million six thousand(9,600,000)square kilometers in size.The Caspian Sea is one thousand and twenty-five(1,025)meters deep.The Nile is six thousand six hundred and seventy-one(6,671)kilometers long.1aA:What is the highest mountain in the world?B:Qomolangma.A:

7、What is _ desert in the world?B:The Sahara.A:What is _ salt lake in the world?B:The Caspian Sea.A:What is _ river in the world?B:The Nile.1cthe biggestthe deepestthe longestIts a lot bigger than the population of the US.修饰比较级：修饰比较级：much,even,a lot,a little,a bit【拓拓】a lot 可用来修饰动作，表示可用来修饰动作，表示“非常非常”【例

8、例】She spent a lot on clothes.Thanks a lot.She helped me a lot.2aIts a lot bigger than the population of the US.the population of“的人口数量的人口数量”表示某地人口数量：表示某地人口数量：The population of（地）（地）is（数）（数）.=（地）（地）has a population of（数）（数）.问某地人口数量：问某地人口数量：Whats the population of（地）（地）?表示人口表示人口“多多”用用 large 或或 great 来

9、修饰；来修饰；表示人口表示人口“少少”用用 small 来修饰来修饰2a【练练】1.（2015 辽宁沈阳）辽宁沈阳）A dog will love you faithfully and bring you _ happiness for years.A.lots of B.manyC.a littleD.a few2.The population of your town _ than ours.A.is largerB.are largerC.is moreD.are more2aChina is almost as big as the US,and it is the biggest c

10、ountry in Asia.as+形容词形容词/副词原级副词原级+as“和和一样一样”，用于肯定句，用于肯定句as/so+形容词形容词/副词原级副词原级+as“和和不一样不一样”，用于否，用于否定句定句【练练】1.（浙江丽水中考）（浙江丽水中考）Steve isnt as _ as Kelly.He often makes mistakes in his writing.A.carelessB.tidyC.carefulD.difficult2.（2015 广东广州）广东广州）Emma looked after her pet dog _ of all her friends.A.caref

11、ulB.most carefulC.more carefulD.the most carefully2aDid you know that China is one of the oldest countries in the world?that 引导的宾语从句表示的内容是真理或自然现象等，那么无引导的宾语从句表示的内容是真理或自然现象等，那么无论主句是何种时态，从句都要用一般现在时。论主句是何种时态，从句都要用一般现在时。one of the+最高级最高级+名词复数名词复数“最最的的之一之一”作主语时，谓语动词要用单数形式作主语时，谓语动词要用单数形式【例例】Song Jie is one

12、 of the tallest students in our class.One of the girls is my sister.2c【练练】1.（四川巴中中考）（四川巴中中考）Our teacher said the earth _ round the sun.A.traveled B.travelsC.travel2.（2015 湖南益阳）湖南益阳）Li Na is one of _ tennis players in the world.A.most famousB.the most famousC.more famous2cNew wordsNew wordsachievemen

13、tsouthwesternthickincludefreezingconditiontake in成就；成绩成就；成绩西南的西南的厚的厚的包括包括极冷的；冰冻的极冷的；冰冻的条件条件吸入；吞入吸入；吞入New wordsNew wordssucceedchallengein the face ofachieveforcenatureeven though（动）成功（动）成功挑战挑战面对（问题、困难等）面对（问题、困难等）达到；完成达到；完成力量力量大自然大自然即使即使(=even if)New wordsNew wordsTenzing NorgayEdmund HillaryJunko Ta

14、beithe Himalayasoceanthe Pacific Oceanthe Amazon River丹增丹增 诺尔盖诺尔盖埃德蒙埃德蒙 希拉里希拉里田部井淳子田部井淳子喜马拉雅山脉喜马拉雅山脉海洋海洋太平洋太平洋亚马孙河亚马孙河3bParagraph 1List four dangers for climbersthick cloudsheavy snowfreezing weather conditionsheavy storms3bParagraph 2List three achievements1953 Tenzing Norgay and Edmund Hillary wer

15、e the first to reach the top1960 the first Chinese team reached the top1975 Junko Tabei from Japan was the first woman to reach the top3bParagraph 1List four comparisonsmost dangerous sportone of the most popular placesthe higheststronger than the forces of nature1.Where are the Himalayas?The Himala

16、yas run along the southwestern part of China.2.How high is Qomolangma?8,844.43 meters high.3c3.Why do so many people try to climb this mountain even though it is dangerous?Because people want to challenge themselves in the face of difficulties.4.What does the spirit of the climbers tell us?We should

17、 never give up trying to achieve our dreams and humans can sometimes be stronger than the forces of nature.3c知识点讲解知识点讲解achieve（动）达到；完成（动）达到；完成achieve ones dream 实现某人的梦想实现某人的梦想achievement（名）成就；成绩（名）成就；成绩force（名）力量（名）力量（动）强迫（动）强迫 force sb.to do 迫使某人作某事迫使某人作某事nature（名）大自然（名）大自然（形）自然的（形）自然的【例例】They stop

18、ped to enjoy the beauty of nature.He is a natural musician.3aNew wordsNew wordscmweighbirthat birthup toadult厘米厘米(=centimeter/centimetre)重量是重量是出生出生出生时出生时到达；至多有到达；至多有（名）成人（名）成人（形）成人的（形）成人的200 cm taller/shorterThis elephant is 200 cm taller than this panda.This panda is shorter than this elephant.weig

19、h much more/lessThis elephant weighs much more than this panda.This panda weighs much less than this elephant.eat much more/lessThis elephant eats much more than this panda.This panda eats much less than this elephant.1aNew wordsbambooendangeredresearchkeeperawakeexcitementwalk intofall overor so竹子竹

20、子濒危的濒危的（动（动&名）研究名）研究饲养员饲养员醒着醒着（名）激动（名）激动走路时撞着走路时撞着绊倒绊倒大约大约New wordsillnesswildgovernmentChengdu Research Basewhaleoilprotectionhuge疾病疾病野生的野生的政府政府成都研究基地成都研究基地鲸鲸油油（名）保护（名）保护巨大的巨大的10 Adult pandas eat about 10 kilos of bamboo a day.12 Adult pandas spend more than 12 hours a day eating bamboo.300 Another

21、 300 or so live in zoos or research centers in China and other countries.2,000 Scientists say there are now fever than 2,000 pandas living in the forests.2b1.What is Lin Weis job?A panda keeper.2.What do the baby pandas have for breakfast?Milk.3.Why are pandas endangered?Because humans cut down bamb

22、oo forests,pandas dont have many babies and baby pandas often die from illnesses and dont live very long.2c4.What does the education program in Chengdu do?It teaches children about pandas and other endangered wild animals.2.Why are scientists doing research?Because they want to better understand the

23、 habits of pandas.2c知识点讲解When the babies see the keepers,they run over to them with excitement and some of the young pandas even walk into their friends and fall over!run over 跑上前去跑上前去【例例】She ran over to say hello,but I didnt recognize her.walk into（走路时意外）撞上（走路时意外）撞上【例例】Mike wasnt looking and walked

24、 into the wall.fall over 摔倒摔倒【例例】Dont run too fast,or you might fall over.【拓拓】fall down 摔倒，摔倒，fall behind 落后于落后于2b知识点讲解Scientists say there are now fewer than 2,000 pandas living in the forests.living in the forests 是是现现在在分分词词短短语语，修修饰饰 pandas，相相当于定语从句当于定语从句 that are living in the forests.【例例】Do you

25、know the girl riding on a horse?=Do you know the girl who/that is riding on a horse?or so 大约大约【拓拓】由由 so 构构成成的的短短语语还还有有：so that 以以便便，and so on 等等等等2b3aWhat do they look like?Where do they live?What do they eat?What can they do?Huge;Some kinds have teeth.In the sea.Small fish and other sea life.Jump high out of the water;Sing songs.3aWhy do some of them have to be protected?How can we protect them?Humans catch whales for meat,fat and oil;Water pollution;Whale parts sold to make things like candles and soap.Rules on whale protection;Learn more about whales;Stop putting rubbish into the sea.