导学案课题：Unit 7. Whats the highest mountain in the world? 第1课时SectionA1a1c【学习目标】：1、了解珠穆朗玛峰，尼罗河，里海，撒哈拉沙漠的概况。. 2、掌握并正确使用形容词的比较级和最高级。 【学习重点】：形容词的比较级和最高级。【学习过程】： 一、 自主学习: （一）学习任务一: 各小组派代表对珠穆朗玛峰，尼罗河，里海，撒哈拉沙漠进行介绍。（二）学习任务二：其他同学聆听的同时完成1a.（三）温故知新： 形容词的比较级和最高级规则的变化：1. 一般的单音节形容词，比较级加-er，最高级加-est。例如：great greater greatest2. 以e结尾的形容词，比较级加-r，最高级加-st。例如：wide wider widest3. 辅音字母加y结尾的形容词，比较级是去y加-ier， 最高级是去y加-iest。例如：happy happier happiest4. 以一个辅音字母结尾，其前面的元音字母发短元音的形容词，比较级是双写这个辅音字母加-er，最高级是双写这个辅音字母加-est。例如：big bigger biggest5. 大部分双音节和多音节的形容词，比较级在前面加more，最高级在前面加the most。例如：beautiful more beautiful the most beautiful6. 少数以-y, -er, -ow, -ble结尾的双音节形容词，比较级加-er，最高级加-est。例如：clever cleverer cleverest不规则变化：形容词比较级最高级goodbetterbestmany/muchmoremostbadworseworstfarfarther/furtherfarthest/furthest二 合作探究： （一）、任务一：小组讨论根据1a填空. MountainRiverSea/LakeDesert 特点 Height (高度)Length （长度）Depth（深度）Area （面积）形容词比较级最高级（二）、任务二：1.小组讨论完成1b.2.每个小组根据1b中所给的信息照样子编对话。 例：- What is the ( highest mountain ) in the world? - ( Qomolangma.)三、展示交流： 1. 用所给词的适当形式填空. (每组中的A同学负责板书，B同学负责读题，C同学负责翻译，D同学负责讲出题中值得大家注意的地方：词、句等)1.Autumn is _(good) season in a year.2.Which book is _(cheap), this one or that one?3.We are twins. Im _(old) than her.4.Lucys cake is _(small) than Lilys.5.Who is _ (tall), Ann, Meimei or Mary? 6. I think this story is _(interesting) than that one.7. The Yellow River is the second _ (long) river in China.8. He thinks his corn is _(delicious) of all the food. 四、检测反馈（对标巩固）抢答每题加一分选择题：1. The River Thames is _ river in England. A. longest B. longer C. the longest D. long 2. Since China has been a member of WTO, English is _useful than before. A. more B. most C. much D. many 3. Which is _ season for planting trees? -Spring.A. good B. better C. the best D well4. The more knowledge you have, _ you will understand. A. well B. better C. the better D the best 5. Whats bad weather! -Yes. The radio says it will be even _ tomorrow. A. bad B. badly C. worse D. worst 五小结： 这节课你学到了什么？_【作业：】句型转换：改为同义句1. Danny ran faster than any other boy in his class. Danny ran faster than _ _ _ in his class. Danny ran _ _ all the boys in his class.2. Town Cinema is the cheapest of all the movie theaters.The cheapest _ _ _ all is Town Cinema.3. The seats of Town Cinema are the worst in town. The seats of Town Cinema are _ _ _ _ cinema in town.