（人教新课标）高二英语选修6课件：Unit 5 The power of nature Period 2 Vocabulary.pptVIP

Unit 5 The power of nature Vocabulary 本节课解释重点单词及其用法拓展，本课的设计思路遵循在语境中学习英语语言。 用根据首字母填写单词导入新课，既巩固了语言点，又达到了让学生自我检测的目的。在讲解重点词汇时，既列举了实例，又给出了准确的中文翻译，中英文结合，更好的帮学生理解和学习语言点。在语言点的扩展上，有不同词性的转化扩展，还有同类短语的总结，让学生更系统的掌握相关知识点。巩固练习，以改错的形式呈现，考查学生的知识再现能力和语言知识的准确性。 I. 根据下列各句句意及所给单词的首字母或汉语提示, 写出各单词的正确形式。 1. You should be able to e______ your own work. 2. It was u_________ that Larry broke his leg on the first day of the holiday. valuate nfortunate Lead in 3. “You’re wrong,” she said with a______ certainty. 4. I am very surprised that she has so many f_______ dreams. 5. The parks of this city are famous for their beautiful ________ (喷泉). 6. The ________ (潜在的) side effects of the drug are unknown. bsolute antastic fountains potential * 1. Have you ever considered how weak humans are compared with a volcano, hurricane or earthquake ? 你是否想过， 和火山，飓风或地震 相比人类是何等脆弱。 consider 思考, 主要用于： consider +名词/-ing形式:  He is considering studying abroad. 他正在考虑出国留学。 * * consider + wh-: We considered how we should help them. 我们仔细考虑应该如何帮助他们。 consider + 副词： Consider carefully before you decide. 要慎重考虑后再作决定。 * 2. Do you enjoy taking risks? risk n. 风险，危险： He was taking a risk by overtaking on a bend. 他在转弯处超车是在冒风险。 The house is a fire risk. 这房子有起火的危险。 * 短语联想： at risk 在危险中: You are at risk if you don’t wear a seat belt. 不系安全带真的会有危险。 * at the risk of 冒……危险 At the risk of seeming rude, I must refused your request, I’m afraid. 尽管似乎无理，恐怕我还是必须拒绝你的要求。 * 3. Having collected and evaluated the information, I help other scientists to predict where lava from the volcano will flow next and how fast. [考点] Having collected and evaluated是动词-ing形式的完成式，说明它表示的动作在主要谓语表示的动作之前发生。 [考例1] The storm left, _____ a lot of damage to this area. A. caused B. to have caused C. to cause D. having caused * [点拨] “暴风雨破坏”这个动作发生在left之前，故用动词-ing形式的完成式。 [考例2] _____ in the queue for half an hour, Tom suddenly realized that he had left his wallet