新人教选修六Unit5Thepowerofnature-Languagepoints[课件]VIP免费

人教课标版 高二 选修 6 Unit 5人教课标版 高二 选修 6 Unit 5 Language pointsLanguage points 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. (2005 全国卷 I)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 at home. ( 北京 2004)A. To wait B. Have waited C. Having waited D. To have waited [ 点拨 ] 此处强调已等了半个小时，然后才意识到没带钱包，故用动词 -ing 形式的完成式。 4.Many houses have been covered with lava or burned to the ground. 许多房屋...