八下Unit7课件.pptx

1、Unit 7 Whats the highest mountain in the world?,Qomolangma Its 8,844.43 meters high!,Its the highest mountain in the world.,the Sahara Its about 9,600,000 square kilometers in size.,It is the biggest desert in the world.,the Nile Its 6,671 kilometers long.,Its the longest river in the world.,the Cas

2、pian Sea Its 1,025 meters deep.,Its the deepest salt lake in the world.,Qomolangma-the highest mountain,the Sahara- the biggest desert,the Nile- the longest river,the Caspian Sea-,the deepest salt lake,1a Match the facts you know., meters high (long, wide) 米高（长，宽)。 英语表示“有多长（宽，高）”时，一般将数词和数量单位放在表示长宽高的

3、形容词前作状语。 e.g. The wall is 1.7 metres wide.,Explaination,1b Listen and complete the sentences.,1. Qomolangma is _ than any other mountain in the world. 2. The Sahara is _ desert in the world. 3. The Caspian Sea is _ of all the salt lakes. 4. The Nile is _ river in the world.,higher,the biggest,the de

4、epest,the longest,1c. Use the information in 1b to make conversations.,A: What is the highest mountain in the world? B: Qomolangma.,A: What is the biggest desert in the world? B: The Sahara.,A: What is the deepest salt lake in the world? B: The Caspian sea.,Pair work,A: What is the longest river in

5、the world? B: The Nile.,Pair work,Bob is fat.,Jim is fatter.,Mary is the fattest.,Bob,Jim,Fan Bingbing is tall.,Yao Ming is taller.,Tom is the tallest.,Cheng Long is short.,Li lianjie is shorter.,Jim is the shortest.,大多数形容词和副词有三个等级： 原级、比较级、最高级。 1.构成的规则变化: 2.构成的不规则变化:,形容词和副词的比较级和最高级,late later - late

6、st,early earlier earliest,big bigger- biggest,fluently/difficult more, most,重读闭音节、末尾只有一个 辅音字母双写加 er 或 est,单音节词在词尾比较级加- er或最高级加- est,以e结尾的词，只需加r 或st,以辅音字母加 y 结尾双音节词变 y 为 i 加 er 或 est,部分双音节和多音节词在原级前加 more 或 most,少数以er,ow 结尾的双音节词加-er -est,tall taller- tallest,clever cleverer-cleverest,形容词和副词比较级和最高级构成 (

7、规则变化),不规则变化,good / well better - best,much / many more - most bad / badly / ill worse worst little less least far farther/ further farthest furthest old older/ elder oldest / eldest,形容词和副词比较级的用法,1.Who runs faster, he or she?,2.He runs faster than she.,3.He runs much faster than she.,4.He becomes hea

8、lthier and healthier.,5.The more you exercise, the healthier you will be.,6.She is less healthy than he.,1.表示两者之间的选择, 可用“Which/Who + 比较，or?”.,2.表示两者之间的比较，通常用连词 than 引导， 表示“更一些”,3.much/far/a lot, even ,still ,a little/a bit 修饰比较级,表示程度.,Who runs faster, he or she?,He runs faster than she.,He runs much

9、 faster than she.,形容词和副词比较级的用法,4. “比较级+and+比较级”表示“越来越”,5. “the+比较级 , the + 比较级”表示“ 越, 越 ”,6. 表示不及另一方时，用“less+原级+than” (双音节和多音节词),He becomes healthier and healthier.,The more you exercise, the healthier you will be.,She is less healthy than he.,He is healthier than she.,Shanghai is becoming more and

10、more modern.,1.比较级 + and +比较级 越来越 2.the+比较级 , the + 比较级 越, 越 ,3._you are, _mistakes you will make. (你越仔细，做错的题目就越少） 4. _you eat, _youll be. (你吃得越多,就越胖) 5. Alice writes well. Mary writes _ than she. (甚至更好）,The more careful,the fewer,The more,the fatter,1.The girl becomes _. (越来越漂亮）,more and more beaut

11、iful,2. The weather is getting _. (越来越槽糕）,worse and worse,even / much better,1.表示三者或三者以上比较,可用”Which/Who +最高级,or ?”表示.,2. 最高级+of/ (同类比较) in (范围比较),4.one of +,形容词最高级,+名词复数表示“最 之一”,3. 序数词修饰最高级,形容词和副词的最高级的用法,Who is the tallest, Tom , Mike , or Jack?,Tom is the tallest of the three.,Mike is the second ta

12、llest student in our class.,Jack is one of the tallest students in our class.,Tom runs (the) fastest in our class.,1. -Which is _ season in Beijing? (2003年) -I think its autumn. A. good B. better C. best D. the best,该题的核心词为season。根据比较级与最高级的知识, 两者之间用比较级, 而三者或三者以上用最高级, 北京有四季, 因此本题应选择最高级。又因为形容词最高级前要加定冠

13、词the, 因此答案为D。,2. - Which is_ , the sun, the moon or the earth?(2004年) - Of course, the moon is. A. small B. smaller C. smallest D. the smallest 解析：正确答案为D。该题的核心词在第一句句尾，the sun, the moon or the earth, 提问的对象为三者，应该选择最高级。,3. The air in Beijing is getting much _ now than a few years ago.(2005年) A. clean B

14、. cleaner C. cleanest D. the cleanest 该题的核心词为than，than一词是比较级的标志。,4. Mobile phones are very popular now and they are _ than before.(2005年) A. cheap B. cheaper C. cheapest D. the cheapest 该题与第三题相似，核心词为than。,1.Hainan is a very large Island .It is the second _ island in china. (large) 2.Our teacher is as _ as before. (busy). 3.He is _ among us. (careful) 4.Li Lei jumped _ than Jim. (far) 5.The busier he is, the _ h