英语人教版八年级下册unit7 sectionA 1a-2c.doc

Unit 7 Whats the highest mountain in the world? Section A1a-2c教学设计I. Learning objectives: 1.掌握本单元重点词汇和常用表达 square, meter, deep, desert, population, Asia, in size, meters long/high/ 会读大数，能表达出多长、多宽及能用比较级和最高级谈论各之最。 2. 能听懂和谈论有关地理和自然的话题。 3. 了解地理和自然之最，培养全球视野和对大自然的敬畏之情。 II. Approaches: three-step reading (pre-reading, while reading, post reading); situational, task-based approaches. 2-1-c-n-j-yIII. Teaching and-learning Aids: Multi-Media, CAI21cnjycomIV. Proceduresstep 1： 引一引：展示单元目标，本节课目标让学生清楚任务；学一学：（大数的读法学习）Show four pictures:The Great Wall; Mountain Tai ;the Yellow River; the Yangtze River.【来源：21cnj*y.co*m】Can you guess how long the Yellow River is?Can you guess how long the Yangtze River is?In our daily life, we usually use the large numbers .How to read?Lets learn today.Show the large numbers and learn how to read.1,025 one thousand and twenty-five6,671 six thousand six hundred and seventy-one 【出处：21教育名师】9,600,000 nine million six hundred thousand8,844.43 eight thousand eight hundred and forty-four point four three21世纪教育网版权所有议一议：小组活动讨论，得出规律：大数的读法应该注意什么？1000以上的基数词的表示法。先从右到左数，每三位数加一个逗点。第一个逗点前的数为thousand(千)，第二个逗点前的数为million(百万)，第三个逗点前的数为billion(十亿)。 用一用：将2b整合到这里使用，借助听力只填写你听到的大数。核对答案。step 2： 自学新知1：Show four pictures:Qomolangma ：the highest mountain in the world.The Sahara : the biggest desert in the world.The Caspian Sea : the deepest salt lake in the world.The Nile: the longest river in the world.完成1a.Match the facts you know. Qomolangma about 9,600,000 square kilometers in sizeThe Sahara1,025 meters deepThe Caspian Sea6,671 kilometers longThe Nile8,844.43 meters high议一议：根据例子，小组活动讨论，得出规律：如何用英语表示“它有米长宽/高/深/厚”例：Qomolangma is 8,844.43 meters high. The Sahara is about 9,600,000 square kilometers in size.21cnjyIt is meters high (long,wide,deep,thick). 数词+数量单位+表示长/宽/高的形容词或者 in +表示长宽高后的名词。21*cnjy*com用一用：翻译下列句子。1.黄河有5,464千米长。2. 泰山1,545米高。3.这张桌子一米宽。step3： 检测新学：1b Listen and complete the sentences；2a Some facts in China.自学指导：1.快速读熟句子。2.尝试翻译。3.组内讨论总结比较事物时用到的句子结构。The Yangtze River is about 6300 kilometers long and the Yellow River is 5464 kilometers long.China has the biggest population in the world. Its a lot bigger than the population of the US. China is over 5000 years old. It has a much longer history than the US. The US is not even 300 years old.China is almost as big as the US, and it is the biggest country in Asia.21教育网议一议：小组活动讨论，得出规律：形容词和副词有三个等级：原级：和.一样 ;结构：as+adj./adv.原级+as比较级：比.更；结构：adj./adv.的比较级+than；注意：程度副词修饰比较级，a lot, much，even .21最高级：最的；结构：the+ adj./adv.的最高级 + of/in用一用：1.中国拥有世界上最多的人口。China has _ _ _in the world.2.它比美国的人口多得多。Its _ _ _ _ the population of the US.3.它比美国历史长得多。It has a _ _ history than the US.4.中国几乎和美国一样大，但它是亚洲最大的国家。China is almost _ _ _ the US,but it is the biggest country in Asia.www-2-1-cnjy-comStep4. 巩固新知一、 写出下列数字6,671 9,600,000二、 写出下列短语20米长 10米宽 15米深 150平方米三、 完成句子1.The red pencil is _ than the green one.(short)2. The _ river in Asia is the Yangtze River .(long) 【来源：21世纪教育