Unit 7 Lesson 38 The World Is a Big Place 课件 2023-2024学年冀教版英语八年级下册

Unit 7 Lesson 38 The World Is a Big Place 新课导入 Asia Europe North America South America Africa Antarctica Australia The continents of the world Review 1.能熟悉并能正确运用本课时的重点单词和短语 2.能掌握关于世界人口,七大洲和四大洋的知识 学习目标 预习检测 1.The lights must 　　　　before you leave the classroom. A.turn on B.turn off C.be turning on D.be turned off 2.About 　　　　of the world is ocean. A.two third　B.two thirds　C.two three　 D.two threes D B 3.There are 50 students in our class_______. A.in total B.at all C.in turn D.at total 4.The school________Guang Ming Middle school. A.is call B.called C.is called D.calls 5.Some students play football, ______play basketball. A.other B.others C.the other D.the others A C B 知识梳理 1. 年份的读法： 一般把表示年份的四位数字按前后分为两组，每一组的数字用基数词来读。 2010读作：twenty ten ； 2025读作：twenty twenty-five； 2050读作：twenty fifty； by 2025 by: 到……之前；不迟于 hundred, thousand, million, billion这些都是计数单位，与具体数字连用不加s，除非短语hundreds of, thousands of, millions of;billions of表示不具体数目加s。 2. in total = in all 合计; 总计 the total of 大量; 许多 (谓单) a total of +可数名词复数 (谓常用复) 强化: Over 1,000 people attended the meeting in total. A total of twenty letters______ received last month. were 3. increase 增加;增大;增长; 增强 increase by +倍数/ 百分数 “增加了…倍/百分之…” increase to +具体数字 “增加到…” 强化: The company has _________ the price of its cars. 公司提高了汽车的价格. The number of the laptop____________ 25% last year. The population has __________(from 300,000) ____ 70,000,000. increased increased by increased to 4. By 2025, the world may have about 8 billion people. by + 将来时间 (用将来时) by + 过去时间 (用过去完成时) 强化: ____ you finish doing the work by next Sunday? We ___________(learn) 1500 new words by 2013. Will had learned 5. 基本分数表达: (1)基数/序数(基为子,序为母) 如:1/5 one fifth 1/9 one ninth (2)分子> 1, 分母用复数 如: 2/5 two fifths 7/9 seven ninths 特殊分数表达: half 一半 quarter 四分之一 如:1/2 one half 1/4 a quarter 3/4 three quarters 强化: __________