ing型的独主只有2种情况能够使用:
1) it should apply most nearly to the subject of the preceding clause ; and, even more importantly,
2) it should have one of the following RELATIONSHIPS to that clause:
* a direct and inevitable, immediate consequence
* simultaneous, but lower-priority, action
这个now drawing不是immediate consquence或者inevitable consequence,更加不是同时发生的事情
-- by 会员 清飞扬 (2011/10/16 19:59:03)