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1、Unit 7 Whats the highest mountain in the world Section A 3（Grammar focus-4c）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 dee
2、pest of all the salt lakes. Did you know that China is one of the oldest countries in the world? Yes, I did. Its much older than the US. Step 1 Grammar形容词和副词比较级和最高级变化规则1. 规则变化 1) 一般情况下，单音节或双音节的形容词（或副词）比较级er ， 最高级est 如： clevercleverercleverest fewfewerfewest smallsmallersmallest等。 2) 以e结尾的词，比较级r，最高级s
3、t 即可。 如：nicenicernicest cutecutercutest largelargerlargest 3) 以辅音字母y结尾的变y为ier或est。如: easyeasiereasiest happyhappierhappiest 再如：early, busy, heavy, dirty, lazy也如此。 少数单音节词也是这样，如： pleasedmore pleasedthe most pleased tiredmore tiredthe most tired 2. 不规则变化： good better best well better best badworse wors
4、t 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)Step 2 中考链接1. 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. 同级比较e.g.
5、The weather in Beijing is colder than that in Xian. Our school is bigger than yours. the + 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 work
6、ed hard last term, but he works even harder this term. 越来越.a. 比较级 + and + 比较级b. the + 比较级 + 句子，the + 比较级 + 句子a. 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
7、 season of the year. “.之一”问题e.g. Beijing is one of the biggest cities in the world. “the + 序数词 + 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 oth
8、er students in the class. = No other students are taller than Tom.2. 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 学以致用1. Our family has bought a car so we can travel _ than before.（2008陕西） A.
9、 most easily B. less easily C. easily D. more easily2. My father told me a story last night. It is _ one Ive ever heard.（2009陕西） A. the funniest B. funniest C. funnier D. the funnier 3. The _ friends you have, the _ you will be.（2010陕西） A. more, happy B. many, happy C. more, happier D. many, happier
10、 4. When he heard a cry for help, he ran out as _ as he could.（2011陕西）A. hardly B. quickly C. finally D. slowly5. This place is not big enough for Lucys birthday party. We should find a _ one.（2012陕西） A. big B. small C. bigger D. smallerStep3 Writing Write five questions using comparisons. Then ask
11、your partner your questionsStep 4 Fill in the blanks with the correct forms of the words in the box. big much popular long 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 seri
12、ous mountain climbers.3. No ocean in the world is as _ as the Pacific Ocean.4. Although Japan is _ than Canada, it is _ smaller.Step 5 Write two comparisons about two topics. Write true facts.e.g. Two rivers: the Yangtze River and the Amazon RiverThe 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.Two cities: _ and _1. _. 2. _.Two animals: _ and _1. _. 2. _.Step5 Homework1. To memorize the important phrases and sentences.2. To make some sentences using as as, . times than, less than, more than
