八年级下册七单元SA 1a--1c课件

1、Section A 1 1a1c,新目标 人教版 八年级英语下,渠县三板乡第一中心学校 代 皓 东,Unit 7,Whats the highest mountain in the world?,Before new class,lets do some reviews. 说出下列单词的比较级和最高级，并 简要归纳adj/adv的变化规则。,high _ _ long _ _ big _ _ good _ _ easy _ _ late _ _ beautiful _ _,higher highest,longer longest,bigger biggest,better best,easi

2、er easiest,later latest,more beautiful most beautiful,Now ,boys and girls please look at the title of Unit 7 and learn the new words.,Presentation,Which is the highest mountain in the world? Which is the longest river in the world? Which is the longest river in Asia? ,Do you know?,Now ,boys and girl

3、s please look at the screen some color pictures, then talk about geography and nature in the world.,Qomolangma 珠穆朗玛峰 runs along the border between China and Nepal.（在中国和尼泊尔边境沿线运行） It is covered with snow all the year round. Its 8844.43 high, the highest in the world.,8,844.43 meters high,the highest

4、mountain in the world （世界最高峰）,Qomolangma,The Nile 尼罗河 is the longest river in the world. Its more than 6, 600 kilometers long. It runs through 9 countries. Its one of the largest river flows through the international states in the world and runs into the Mediterranean Sea(地中海) in the end.,The Nile,t

5、he longest river in the world,6,671 kilometers long,The Sahara,The Sahara is the biggest desert in the world. It is located in the northern Africa（北非）, climate conditions（气候条件） are very bad. It is one of the earths most not suitable for biological survival.,About 9,600,000 square kilometers in size,

6、the biggest desert in the world,big-(in size)-square kilometer,The Caspian Sea,The Caspian Sea is the biggest salt lake in the world. It lies in the border between Asia and Europe.（它位于亚洲和欧洲之间的边界）,the deepest of all the salt lakes,1,025 meters deep,The Yangtze River,The Yangtze River is the third lon

7、gest river in the world, the first Asian river. Its 6211.31 kilometers long.,1a,Match the facts you know.,A: How high is Qomolangma? B: Its 8,844.43 meters high.,Practice,A: How long is the Nile? B: Its 6,671 kilometers long.,A: How big is the Sahara? B: Its about 9,600,000 square kilometers in size

8、. A: How deep is the Caspian Sea? B: Its 1,025 meters deep.,How high /big/deep/long 分别对应问高度/大小/深度/长度.,用英语说出下列数字。,41_ 387_ 6,529_ 658,723_ 4,864,297_ _,forty-one,three hundred and eighty-seven,six thousand five hundred and twenty-nine,six hundred and fifty-eight thousand seven hundred and twenty-thre

9、e,four million eight hundred and sixty-four thousand two hundred and ninety-seven,5,6,3,2,9,4,5,2,1,1,自学指导：How to read large number,总结归纳 ： 多位基数词读法,389,three hundred and eighty-nine,1）101999的三位数由“百位数and+_.,2)三位数以上的数，从个位往前数，每三位数加一个逗号，从后往前数的第一个逗号代表_ , 第二个逗号代表_, 第三个逗号是_，注意这几个词不能用复数形式，后也不能加and。 2,648 two

10、 thousand, six hundred and forty-eight,两位数（十位和个位数）,thousand,million,billion,6,671,8,844.43,9,600,000,1,025,let me try 自学检查,中考连接：中考题中常涉及选择题（确切与不确切数目的表达） 表示确切数目时，hundred, thousand, million, billion等前面有基数词无论是多少都不能在这几个词后加s; 如：three hundred books five thousand students 表示不确切数目时，这类词后加-s且与of连用 译“数以计”。 如： h

11、undreds of people thousands of students 实 战 中 考 1.There are _ people in the meeting room. A.thousand B. thousands C. thousands of D. thousand of 2. My father has three_ books about Chinese history. A. hundreds of B. hundred C. hundreds D. hundred of,C,B,1b,Listen and complete the sentences.,1. Qomol

12、angma 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 deepest,the longest,Use the information in 1b to make conversations,1c,A: What is the highest mountain i

13、n the world? B: Qomolangma. What is=Whats,What is the highest mountain in the world? What is the longest river in Asia?. ,Talk about these pictures in pairs.,What is the longest river in the world?,The Nile.,What is the deepest desert in the world?,The Sahara.,活学活用: 1. The Yangtze River is _the Yellow River. A. longer than B. as long as C. shorter than 2. China is _ in the world A. the o