以下是引用carefield在2003-5-5 23:34:00的发言: B 中, using a Doppler ultrasound device, 是分词做句中的状语,( 不是介词结构),在这种情况下, 不论分词在主句前, 还是主句后, 都应该和主句同指一个主语.
同意以上的观点。(但,我感觉也不是绝对的)体会一下下面的句子: OG259. Five fledgling sea eagles left their nests in western Scotland this summer, bringing to 34 the number of wild birds successfully raised since transplants from Norway began in 1975.
The "-ing" (present participle) form introduces action that is simultaneous with the action of the main clause; i.e., bringing indicates that the number of wild birds became 34 when the sea eagles left their nests.
[此贴子已经被作者于2003-5-6 13:29:06编辑过] |