外研版必修三Module 4 Sandstorms in Asia Reading课件（共26张ppt）

surprising Sand storms in Asia Sandstorms in China Ways to solve the problem 6. ________________ has been started to help solve it and the government has already planted 7. __________________ trees and plans to 8. _______________ for the next five years. A mass campaign more than 30 billion continue planting We shouldn’t go out. We have to wear masks and glasses. Cars should slow down and have to turn on headlight. What we should do in a sandstorm to protect ourselves: What is the main cause of sandstorms What is desertification How does it happen desertification This is a process that happens when land becomes desert because of climate changes and because people cut down trees and dig up grass(分析+翻译) 这是一个复杂的主从复合句. 主句是________________，其后that引导的是 一个_______从句,修饰_______,这个从句中包含一个时间状语从________________________，而 because of climate changes做原因状语，_________引导原因状语从句。 this is a process 定语 when lands becomes desert… because 这是一个因气候变化和人类砍树挖草导致土壤沙化的过程。 process cut down trees nothing to hold.. soil be blown away soil be washed away nothing to hold.. cut down trees soil be blown away soil be washed away too many sheep and cattle all the grass be eaten up grass never grow again ; the land become desert

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