Unit 7 What’s the highest mountain in the world? Section A 1a-2c 课件2022-2023学年人教版英语八年级下册

Unit 7 What’s the highest mountain in the world? Section A 1a-2c How high is Qomolangma? How to read numbers Qomolangma is about 8,844.43 meters high. thousand eight eight thousand, eight hundred and forty-four point four three point Qomolangma is the highest mountain in the world. How to read numbers about 9,600,000 square kilometers in size million thousand nine million, six hundred thousand It’s the biggest desert. the Sahara How big is the Sahara? 9,600,000 1,025 6,671 8,848.86 try to read these large numbers six thousand six hundred and seventy-one one thousand and twenty-five nine million six hundred thousand eight thousand eight hundred and forty-eight point eight six Match the geographical facts you know. 1a The Sahara is about 9,600,000 square kilometers in size. The Caspian Sea is 1,025 meters deep. The Nile is 6,671 kilometers long. Qomolangma about 9,600,000 square kilometers in size The Sahara 1,025 meters deep The Caspian Sea 6,671 kilometers long The Nile 8,844.43 meters high Qomolangma is 8,844.43 meters high. high in size deep long The Sahara desert Africa The Caspian sea Salt lake Between Europe and Asia The Nile river Egypt =in depth =in length =in height 基数词+单位词+形容词（long/wide/high/deep/） eg:Qomolangma is 8,844.43 meters high. 基数词+单位词+ in + 名词（length/width/height/depth/） eg:Qomolangma is 8,844.43 meters in height. 基数词—单位词单数—形容词(+名词)（a ten-meter-wide street） eg:Qomolangma is 8,844.43-meter-high. 1. 长、宽、高、深、面积的表达方法 Qomolangma is _____________ than any other mountain in the world. The Sahara is _____________ desert in the world. The Caspian Sea is _______________ of all the salt lakes. The Nile is _______________ river in the world. higher the biggest the deepest the longest Listen and complete the sentences. 1b 形容词或副词的最高级： 1）规则变化： 1.单音节形容词、副词在词尾加--est : great - greatest 2.以不发音的e结尾的单音节形容词、副词在词尾加--st: wide-widest 3.以辅音字母加y结尾的形容词、副词，变y为i 加-est happy-happiest; busy-busiest; 4.以重读闭音节结尾的辅元辅，双写辅音再加est: