仁爱版九年级英语上册 Unit 2 Topic 2 Section A 课件(共24张PPT)

Section A　 学习目标：1、熟记新单词，学会运用新短语； 2、学习不定代词和不定副词。 情感目标：了解沙尘暴的形成及其危害，认识树木的重要性，提高环保意识。 Review: Read the new words and review the pollution around us. forest Lead in What happened to the forest ? People have cut down too many trees. The forest has gone. What’s worse, the forest has changed into desert. n. 沙漠 v. 舍弃、遗弃 The wind is blowing strongly with lots of sand, we call it sandstorm. n. 沙 n. 沙尘暴 Wash the earth away many trees change into desert forest gone sandstorms come into being cut down trees ( 4 ) ( 1 ) ( 5 ) ( 3 ) ( 6 ) ( 2 ) 思考：How does the sandstorm come into being? 形成、产生 Self –study：（小组讨论，完成自主学习） 1、Enjoy the flash35-1a.swf and choose the best answer. 2、Change the word into correct forms. 3、 Read the dialog, underline the phrases and translate them. 1、The boy and girls are talking about _____ B 2、【词形变换】 变为名词：pollute _________ 变反义词：outside _________ 变同义词：prevent _________； though __________； rubbish _________ pollution