现在完成时的被动语态

的兴趣 Teaching Aims ? Review the Present Perfect Tense ? Talk about the Present Perfect Passive Voice ? Do some exercises about the Present Perfect Passive Voice ? Say thanks to persons who have helped you 通过告知学生本课的 Teaching Aims, 他们能够了解本节课的重点,在听课过程中合理安排时间,提高学习效率. Obama has e the first African- American president in the United States of America. 把听力作为导入,一方面锻炼学生的听力水平,了解美国的政治体制,最主要的是引出本节课的重点--- 现在完成时态 The Present Perfect Tense Sentence structure: 主语+have/has done 现在完成时表示动作发生在过去,并持续到现在或者是过去的动作对现在的影响. 经常用于现在完成时的时间状语: recently, up to now, since then, so far, already, just, yet 等. How many Harry Porter books has J.K.Rowling written? She has written seven Harry Porter books . Seven Harry Porter books have been written by J.K.Rowling. 根据学生爱好,创设情境。通过求助的方式,提高学生的兴趣。同时, 可以引出本节课的中心---现在完成时的被动语态。