Unit7SectionA3a-4c学案--人教版八年级下册英语.docx

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1、Unit 7 Whats the highest mountain in the world?Section A 3a 4c ( 第2课时)导学目标：1. 能够掌握本课出现的重点短语和句子。2. 能够正确使用形容词的比较级。3. 能够运用形容词的比较等级去描述事物。教学重难点：1. Whats the higest mountain in the world? Qomolangma.2. How high is Qomolangma? Its 8,884 meters high. Its higher than any other mountain in the world.3. Do you

2、 know that China is one of the oldest countries in the world? Yes, I did. Its much older than the US.课前预习：从课本中找出并翻译下列短语。（1）最危险的运动之一 （2）登山，攀岩 （3）全世界 （4）中国的东南边境 （5）山顶 （6）严寒的天气条件 （7）大风暴 （8）冒着生命危险 （9）放弃 （10）实现梦想 课堂导学：语法梳理形容词和副词的比较级和最高级1.形容词、副词比较级和最高规则变化和不规则变化。 (1)单音节和部分双音节形容词和副词,在原级的后面加上er,est构成比较级和最高级。

3、a)直接加er,est ：b)以重读闭音节结尾的,要双写最后一个辅音字母,后加er,est：c)以辅音字母+y结尾的,先把y改为i再加上er,est：(2)两个音节或两个以上的音节的,在原级前加more / most.不规则变化:原级比较级最高级good好的better更好的best最好的well好；(身体)好的,bad,badly糟糕的,糟糕地worse更糟糕的,更糟糕地；(身体)更不舒服的worst最糟糕的,最糟糕地；(身体)最不舒服的ill(身体)不舒服的many许多的(可数)more更多的；更most最多的；最much许多的(不可数)；非常little少的less更少的least最少的

4、far远的；远地farther更远的；更远地farthest最远的；最远地2.用法原级常用的句型结构(1)“甲+as+形容词原级+as+乙”表示“甲和乙程度相同”或“甲是乙的几倍”1.Tom is as old as Kate. 2. Tom is twice as old as Kate.3.Tom runs as fast as Mike。 4. Tom runs twice as fast as Mike.否定形式： “甲+not+as/so+形容词原级+as+乙”甲不如乙 This room is not as/so big as that one. He doesnt walk as

5、 slowly as you.比较级的用法1.可以修饰比较级的词，much，a lot，far，的多 a little，a bit，一点儿 even甚至 still仍然 Tom looks even younger than before.汤姆甚至比以前更年轻。This train runs much faster than that one.这辆火车比那辆跑地快。She drives still more carefully than her husband.她开车仍然比她丈夫还认真。2.“甲+形容词比较级+than+乙”表示“甲比乙”或“甲比乙几倍”Tom is taller than K

6、ate.This room is three times bigger than that one.I got up earlier than my mother this morning.He runs three times faster than his brother.他跑的速度比他弟弟快三倍。3. “比较级than any other+单数名词（比其他任何都）”。 Li lei is taller than any other boy in his class. The Yangtze River is longer than any other river in China.=Th

7、e Yangtze River is longer than the other rivers in China.=The Yangtze River is the longest river in China.注意：The Yangtze River is longer than any river in Japan.4.“比较级+and+比较级”表示“越来越”。He is getting taller and taller.He does his homework more and more carefully.“the+比较级，the+比较级”表示“越，越”。The more caref

8、ul you are，the fewer mistakes youll make.5.“特殊疑问词+形容词比较级，甲or乙？”Which is bigger，the earth or the moon？ Who draws better，Jenny or Danny？ 形容词的最高级的用法 1)三者或三者以上相比较用“the最高级名词范围”。 Hu Yun is the fastest of all the girls in our class. 2）.表示“最之一”，用“one of the+形容词最高级复数名词”。 The Great Wall is one of the greatest

9、 buildings in the world.当堂导练：1. 3a 小组合作，共同找出课文中的重点短语和句型，讨论并讲解给同学们。2. 3b 根据课文内容完成下面的表格，并在小组内订正答案。Paragraph1Paragraph 2Paragraph 3List three comparisonsList three dangers for climbersList three achievements 3. 根据文章内容回答下列问题。 1. What sports is one of the most dangerous sports ? _ 2. Can you describle so

10、mething about Qomolangma? _ 3. What difficulies will you meet if you clime Qomolangma? _ 4. Who is the first people to reach the top? _ 5. When did the first Chinese Team to the top? How about the first woman? _ 6. Why do so many people try to climb this mountain even thoughe it is danger-ous? _4. Groupwork 讨论“世界之最”，完成课本4a4c.【总结反思】通过本节学习,我学会了（单词）_我学会了（短语）_学科网（北京）股份有限公司