高中英语_Sandstorms in Asia教学课件设计.ppt

1) The winds in a sandstorm can sometimes _________________________ 2) When Ren Jianbo was living in Inner Mongolia _____________________________ 3)?Sandstorms in China appear to have increased because of _____________ 4) Cutting down trees and digging up grass can cause ____________________________ 5)?The government is planting trees to the west of Beijing to ___________________________ Complete the sentences prevent you from seeing the sun he experienced a terrible sandstorm desertification. deserts and sandstorms to increase prevent the desert coming nearer 1 .To have been caught in a sandstorm was a terrible experience. ①不定式的完成式作主语 e.g.: To have been bitten by a dog was not a delightful experience. ②be/get caught in sth. :被困在…中/ 遭遇上 e.g.: we were caught in a traffic jam. 昨天他们遇上了大雨 Yesterday they __________ in a heavy rain. Were caught 2.Sandstorms in China appear to have increased … appear (tobe )+n.\adj. appear to do It appears (to sb) that He appears (to be) very old. 2 .他似乎生病了 It ______ that he is ill. 1. 他看上去很老 appears t * Book3 Module4 Sandstorms in Asia Teaching aims 1. Grasp some new words and expressions. 2. Help the Ss know how to express the experience in their life. 3.Help the students to understand some key sentences and words Difficult points： Some important sentences and phrases Can you name some natural disasters? earthquake hurricane tornado flood drought tsunami sandstorm Lead in The sky is yellow and it is difficult for us to see things clearly Discussion 1.What happened in these pictures? 2.How about the sky ? 3.Why do they wear masks ? . A sandstorm is happening.We see the sky is orange The air is very dirty and brown-yellow, which can make people ill so that people wear masks to protect themselves. B C A Inner Mongolia Gansu Xinjiang A B C D North America Central Africa Australia Central Asia 1. sandstorm n. 2. frightening adj. 3.mass