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1、Unit 7Whats the highest mountainin the world?,Grammar focus, Whats the highest mountain in the world? Qomolangma. How high is Qomolangma? Its 8,844.43 meters high. Its higher than any other mountain., Which is the deepest salt lake in the world? The Caspian Sea is the deepest of all the salt lakes.
2、Did you know that China is one of the oldest countries in the world? zxxk Yes, I did. Its much older than the US.,大多数形容词有三个级。 1. 原级:Structure : as . as. 像.一样 e.g. Tim is as tall as Tom. 2. 比较级 (用于两者之间的比较):Structure：形容词比较级 than . e.g. This box is bigger than that one.,形容词和副词的比较级和最高级,3. 最高级(用于三者或三者以上的
3、比较):Structure: the + 形容词的最高级of / in . e.g. Tom is the heaviest in our class. He is the most popular in our school.,规则变化 1) 一般情况下，单音节或双音节的形容词/副词比较级er， 最高级est。如:clever cleverer cleverest few fewer fewest small smaller smallest 等。,形容词、副词的比较级和最高级规则变化和不规则变化,2) 以e结尾的词，比较级r，最高级st 即可。 如：nice nicer nicest cu
4、te cuter cutest large larger largest 3) 以辅音字母y结尾的变y为ier或est 如: easy easier easiest happy happier happiest 再如：early, busy, heavy, dirty, lazy 也如此。,4) 重读闭音节，单辅音结尾的，双写这个辅音字母er 或 est的词： fat fatter fattest thin thinner thinnest hot hotter hottest red redder reddest wet wetter wettest big bigger biggest z
5、x。xk,5) 多音节和部分双音节的词需要在形容词原级前more 构成比较级，the most 构成最高级。如： beautiful more beautiful the most beautiful 又如: delicious, popular, important, interesting, expensive, creative双音节的词如: careful more careful the most careful useful more useful the most useful,少数单音节词也是这样，如： pleased more pleased the most pleased
6、 tired more tired the most tired b) 不规则变化： good better best well better best bad worse worst many/much more most,far farther farthest (距离远) far further furthest (程度深) old elder eldest (长幼) old older oldest (年龄),二、用法1.比较级表示两者 (人或事物) 的比较。eg. I am taller than Tom.My dress is more beautiful than hers.2.
7、 最高级表示三者或三者以上 (人或事物 ) 的比较, 其中有一个在某一方面超过其他几个时, 用最高级。最高级的前面一般要加定冠词 the, 后面可带 of ( in )短语来说明比较的范围。如：She is the youngest in the class.Jason is the tallest of the three.Whose handwriting is the best of all?,3.在形容词比较级前还可用much, even, still, a little来修饰, 表示“的多”, “甚至”, “更”, “一些”。如：This city is much more beau
8、tiful than before. Shes a little more outgoing than me. Its a little colder today. 4.“比较级and比较级”意为“越来越” 。多音节比较级用“more and more形容词原级”形式。如：Its getting worse and worse. The group became more and more popular.,5. “Which / Who is + 比较级？”比较A、B两事物, 问其中哪一个较时用此句型。如：Which T-shirt is nicer, this one or that on
9、e? Who is more active, Mary or Kate?Which one is more popular among students, going to concerts or going to movies?,6. 使用形容词比较级时需注意以下几点：1) than后面接代词时, 一般要用主格形式， 但在口语中也可使用宾格形式。 如：My brother is taller than I / me. 2) 当需要表示一方超过另一方的程度时，可以用much, a lot, a little, a bit, even, still等来修饰形容词比较级。注意: 比较级不能用ver
10、y, so, too, quite等修饰。如： He is much more serious than Sam.,3) 形容词比较级后面往往用连词than连接另一个比较的人或事物, 但在上下文明确的情况下, 形容词比较级可单独使用。如：My sister is tall, but my aunt is taller.我姐姐个子高, 但我姑姑个子更高。,原级比较,表示两者之间没有差别时,使用原级比较： 主语(第一个人物) + 谓语动词 + as + 形容词/副词原级 + as + 第二个人物 +. 如：He is as excited as his younger sister. 他和他妹妹一
11、样兴奋。 Lily rode her bike as slowly as an old lady. 莉莉骑车像老太太一样慢。 They picked as many apples as the farmers . 他们摘的苹果和农民一样多。,表示第一个人比不上第二个人时,使用句型: 主语(第一个人物) + 谓语动词(否定式) + as / so + 形容词/副词原级 + as Heisnotso/asexcitedashisyoungersister. 他没他妹妹那么兴奋。 Lilydidnotrideherbikeso/asslowlyasan oldlady. 莉莉骑车不像老太太那样慢。
12、Theydidntpickso/asmanyapplesasthe farmers(did).他们摘的苹果不如农民多。,三者或三者以上相比，表示最高程度时，用“the + 最高级”的结构表示。这种句式一般常有表示比较范围的介词短语。例如：Zhang Hua is the tallest of the three.He works (the) hardest in his class.,最高级的用法,2. 最高级可被序数词以及 much，by far，nearly，almost，by no means，not quite，not really，nothing like 等词语所修饰。例如：Thi
13、s hat is by farmuchnearlyalmostnot nearlyby no meansnot quitenothing like the biggest. How much did the second most expensive hat coat?,3. 表示“最高程度”的形容词，如 excellent，extreme，perfect等，没有最高级，也不能用比较级。4. 形容词最高级修饰作表语或介词宾语的名词、代词时，被修饰的词往往省略。e.g. He is the tallest (boy) in his class.5. 作状语的副词最高级前可以不加定冠词。e.g.
14、Of all the boys he came (the) earliest.,比较级考点 比较级修饰问题a little, a bit, even, still, much, a lot, far 等可修饰比较级。e.g. Tom is a little taller than Jim. This book is much more interesting than that one.,中考链接, 同级比较e.g. The weather in Beijing is colder than that in Xian. Our school is bigger than yours. the
15、+ 比较级e.g. Lucy is the fatter of the two girls., “a/an + 比较级”表示“又一，再一”e.g. Lily has a doll, but she wantsa bigger one. 隐性比较（没有than的情况）e.g. Who runs faster, Lucy or Lily? Youd better come earlier next time. He worked hard last term, but he works even harder this term., 越来越. 比较级 + and + 比较级b. the + 比较级
16、 + 句子，the + 比较级 + 句子e.g. Its getting colder and colder. The more you exercise, the better you are.,2. 最高级考点说明：形容词的最高级前必须加the；副词的最高级前省略the。 范围问题e.g. Tom is the tallest student in the class. Spring is the best season of the year., “.之一”问题e.g. Beijing is one of the biggest cities in the world. “the + 序
17、数词 + 最高级”e.g. I think he is the second tallest boy in his class.,3. 比较级和最高级的转换e.g. Tom is the tallest student in the class.= Tom is taller than any other student in the class.= Tom is taller than all the other students in the class.= No other students are taller than Tom.,总结： any other + 名词单数 the ot
18、her + 名词复数 否定 + 比较级 = 最高级 比较级 + 极限 = 最高级,同级比较 as + adj./adv. + as e.g. She is as thin as Lily. He writes as carefully as Linda. not + as/so + adj./adv. + as e.g. Tony didnt run so fast as Carter.,1. Our family has bought a car so we can travel _ than before.（2008陕西） most easily B. less easily C. eas
19、ily D. more easily2. My father told me a story last night. It is _ one Ive ever heard.（2009陕西） the funniest B. funniest C. funnier D. the funnier,学以致用,D,A,3. The _ friends you have, the _ you will be.（2010陕西） A. more, happy B. many, happy C. more, happier D. many, happier 4. When he heard a cry for
20、help, he ran out as _ as he could.（2011陕西） hardly B. quickly C. finally D. slowly,C,B,5. This place is not big enough for Lucys birthday party. We should find a _ one.（2012陕西） big B. small C. bigger D. smaller,C,Fill in the blanks with the correct forms of the words in the box.,big much popular long
21、 old high,1. The Amazon River is one of the _ rivers in the world. Its a little _ than the Yangtze River.2. Qomolangma is 8,844.43 meters _. Its one of the most _ places for serious mountain climbers.,longest,longer,high,popular,4a,3. No ocean in the world is as _ as the Pacific Ocean.4. Although Ja
22、pan is _ than Canada, it is _ smaller.,big,older,much,太平洋,n. 大海；海洋,Write two comparisons about two topics. Write true facts.,Two rivers: _ and _,e.g.,4b,The Yangtze River is almost as long as the Amazon River.The Amazon is longer than the Yangtze, but the Yangtze River is the longest river in China.
23、,the Yangtze River,the Amazon River,Two cities: _ and _1. _. 2. _ .,Two animals: _ and _1. _. 2. _ .,Write five questions using comparisons. Then ask your partner your questions.,Writing,1. _2. _3. _4. _5. _,e.g.,4c,What is the highest building in our city?,Exercises,1. She is _ than _. A. busier /
24、us B. busier / we C. more busy / us D. more busy / we 2. Jane is _ than Betty. A. less taller B. less tallest C. less tall D. not as tall 3. China is _ country in the world. A. the third largest B. the largest third C. the third large D. a third largest,B,A,A,4. Which is _ season in Beijing? I think
25、 its autumn. A. good B. better C. best D. the best 5. Which is _, the sun, the moon or the earth? The moon is. small B. smaller C. smallest D. the smallest,D,D,6. I study English as _ as my brother. A. hard B. harder C. hardest 7. Which is _, a bicycle or a computer? A. expensive B. more expensive C. the most expensive 8. The Yellow River is one of _ rivers in China. A. long B. longer C. the longest,A,B,C,Homework,1. To memorize the important phrases and sentences. 2. To make some sentences using as as, . times than, less than, more than,
