Unit 22 Environmental Protection Lesson3 Natural DisasterStep 1:Learning Aims:(学习目标)1.To make sure students can pronounce the words correctly. 2.To master the usages of some important words and phrases.Important and Difficult Points:(重难点)To master the usages of some important words and phrases.Step2: Check preview（检查预习）Let some students read words in lesson3 and communication workshop.Step3:Self-study（自主学习）一、重点单词1. n. 台风 2. adj. 巨大的 3. n. 范围;规模 4. adj. 多变的 5. n. 降雨量 6. n. 灌溉 7. adj. 艰难的 8. adj. 在近海岸的 9. n. 巨大的灾难 10. n. 分离;分开 11. n. 方法 12. vt. 建造 13. n. 砖;砖块 14. adj.多山的 15. vt.& vi. 逃走 16. n. 可能性;潜在性 二、重点短语1. 导致 2. 谋生 3. 彻底毁灭 4. 打开;袭击;恶劣地对待 5. 克服 6. _______________ 从……恢复/痊愈 7. 结果 8. 处于风险中 9. 武装着……Step4: Cooperating （合作探究）词类转换：按要求写出下列单词的适当形式(1)changeable(adj.)________________(v.)改变，变化（2）irrigation (n.)____________(v.)(3)separation(n.)________________(v.)(4)construct(v.)___________ _____(n.)(5)mountainous(adj.)_______________(n.)山（6）negative(反义词)_____________（积极的）（7）considerate(adj.)_____________(v.)思考，考虑（8）allocate(v.)____________(n.)(9)politics(n.)______________(adj.)政治的（10）calculate（v.）______________(n.)2.翻译下列短语（1）result from_____________(2)separate...from...______________（3）by no means______________(4)flee from_____________(5)sum up____________(6)all the best_______(7)as a matter of fact_____________(8)break away from________________(9)break out________________Step5: Doing exercises（课堂检测）1.A t is a violent tropical storm with very strong wind. 2.How many people participated in the g ceremony? 3.Nowadays the international situations are c . You can never predict what will next happen precisely. 4.It is...
