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1、形容词比较级和最高级的正确使用 教案教学目标比较级与最高级构成方法；形容词比较级和最高级用法及句型。重点难点形容词比较级和最高级的运用Warm up复习上节课副词看图说话： 小练习（点名口头回答）Definition绝大多数形容词有三种形式,原级,比较级和最高级, 以表示形容词说明的性质在程度上的不同。 形容词的原级: 形容词的原级形式就是词典中出现的形容词的原形。 例如: poor tall great glad bad 形容词的比较级和最高级: 形容词的比较级和最高级形式是在形容词的原级形式的基础上变化的。 分为规则变化和不规则变化。比较级学习：当两种物体之间相互比较时，我们要用形容词或副
2、词的比较级；当相互比较的物体是三个或三个以上时，我们就要用形容词或副词的最高级。 形容词、副词的比较级和最高级的变化规律：1. 单音节形容词或副词后面直接加-er或-esttalltallertallest fastfasterfastest2. 以-e结尾的单音节形容词或副词直接加-r或-stlargelargerlargest nicenicernicest3. 以-y结尾的形容词或副词，改-y为-i再加-er或-estbusybusierbusiest earlyearlierearliest4. 形容词或副词是重读闭音节时，双写最后的辅音字母，再加-er或-esthothotterho
3、ttest bigbiggerbiggest5. 多音节形容词或副词前面直接加more或mostdeliciousmore deliciousmost deliciousbeautifulmore beautifulmost beautiful6. 不规则变化原级-比较级-最高级 good (well)betterbest bad (badly)worseworstmany-more-mostmuch-more-most bad-worse-worst far-farther, further-farthest, furthest1）规则变化练习a. tall ， long , short b
4、. nice , fine , large c. big ， hot d. busy , easy e. boring ，exciting 2）不规则变化练习原级比较级最高级good (好的)well(健康的, 舒服的)bad (坏的/糟糕的),ill (病的)many/much (多的) Little (少的，小的) old (老的/大的, 旧的) (较老/大/旧的, 更老/大/旧的) (较老/大的，更老/大的，仅用于兄弟姐妹间) (最老/旧的) (最老/大的, 仅用于兄弟姐妹间)far(远的)farther (较/更远的)further (进一步的) farthest (最远的)furth
5、est (最远的)(2) 比较级和最高级使用1. Shanghai is an city than HK.(old) 2. He is the of the two students.(young) 3. He is the of the three.( old) 4. Which pen is , the green one or red one?句子使用比较级的三大标志：当句中含有than一词时, 句子一般使用比较级, 构成形式为: “形容词比较级+than. ”, 意为:“比更加”. 有时如果说话双方都明白句子含义时，也可没有than一词. (less是little的比较级，也可用于比较
6、级中，放在形容词原级前, 意为: “较不”或“没有那么”)He is taller than his brother. There are more students in Class One than in Class Two.Lucy has more books than Andy.Mr Li looks older than Mr. Ma Shanghai is an older city than Hong Kong.-Lets go to the new restaurant tonight. -We can cook it at home. Its less expensive.
7、 Mary is less clever than Tom. The Yangtze River is longer than any other river in China. b. 当句中含有., A or B? 时，句子一般使用比较级。 (58). Which pen is newer, this one or that one? (59). Which is better, the red one or the green one?c. 当句中含有of the two (+n) 时，句子一般使用比较级。(60). He is the younger of the two student
8、s. . 句子使用最高级的四大标志 a. 当句中含有表示范围的介词in.时，句子一般使用最高级。要注意：如果句中有than一词，那么即使句中有in, 句子仍然必须用比较级。 He is the tallest in his class. He is the strongest student in our class. The Yangtze River is longer than any other river in China.b. 当句中含有表示范围的介词of 时，句子一般使用最高级。 He is the tallest of the three. He is the oldest o
9、f all the students. This apple is the biggest of the five. c. 当句中含有one of the时，句子一般使用最高级。one of the + 形容词最高级 + 复数名词, 表示最的之一。The Yellow River is one of the longest rivers in China.Beijing is one of the largest cities in China.d. 当句中含有, A，B or C ? 时，句子一般使用最高级。 Which is the biggest, the sun, the earth
10、or moon? Which country is the largest, China, Brazil or Canada？Quiz课堂练习：1）填空1. Which is _(heavy),the elephant or the pig? 2. Who gets up _(early),Tim or Tom? 3. My eyes are _(big) than _ (she).4. Jim runs _(slow). 5.Ben _ (jump) _ (high) than some of the boys in his class.6._ Nancy sing _ (well) tha
11、n Helen? Yes, she _. 2）口语in pairs句型练习：（每位学生需利用课上所学过的句型造句，思考三分钟：）小结形容词、副词的比较级和最高级的句子公式：比较级-形容词物体A + am / are / is + 形比 + than + 物体B.I am taller than you.Pasta is more delicious than pizza.副词物体A + 行为动词 + 副比 + than + 物体B.Cheetahs run faster than goats.He studies better than me. 最高级-1）物体A + am / are / i
12、s + the + 形最高级 + 比较范围（of + 人/物，in +地方）.I am the tallest in the class.Pasta is the most delicious food of the three. 2）物体A + 行为动词 + 副词最高级 + 比较范围（of + 人/物，in + 地方）.Cheetahs run fastest in the world.He studies best of us.Homework课后作业1） 选择（ ）1. The yellow shoes are_ than the blue ones. A. expensive B. e
13、xpensiver C. more expensive（ ）2.Im taller than others in my class. Im _ A. tall B. tallestC. the tallest（ ）3. Whos the _ ,Jean, Joan or Jennet? A. thinner B. thinest C. thinnest（ ）4. Tim is_ than Jack. A. funny B. much funny C. funnier（ ）5. Please clean your room. Its_ now. A. clean B. dirty C. tidy（ ）6. His uncles house is very _ A.old B. older C. oldest（ ）7. Please be quiet. I have _ to tell you. A. important something B. nothing important C. anyt
