自考英语（二）60讲 Lesson 32

本讲为2006年下半年新的教学内容，请对照教材，练习册和语法书听录音！       Doing        being done   Having done having been done   Done       To do                                                      to be done   To be doing   To have done to have been done   Having finished his homework, he went to bed.   Finished, the homework was put aside.   The book being written by him is what I need.   The book written by him is what I need. Unit 6 Text A   重点词语   increasingly  adv.   不断增加地  Their argument became increasingly bitter.   prevalent  a.   流行的，普通的  These diseases are more prevalent among young children.   frame  n.   构架，框架    The bicycle frame was chained to a post, so the thieves could only steal the wheels.