赞楼主的分析,我觉得入门了:) 以下是引用Pennylee在2006-11-28 13:39:00的发言:
分享文法书上的解释: 用完成不定词时,表示其动作发生的时间先于前描述的动词所表示的时间,含有时间先后的观念在里面 The herbicide Oryzalin was still being produced in 1979, three years after the wives of workers producing the chemical in Rensselaer, New York, were found to have had miscarriages or to have borne children with heart defects. (被发现时已经流产了, 先流产;后被发现已经流产了) The fear of rabies is well founded: few people are known to have recovered from the disease once the clinical symptoms have appeared.(被知道已经康复了;先康复;后被知道已经康复) Geologists believe that the Bering land bridge, over which human beings are thought to have first entered . (被认为已经进入了;先进入;后被提出认为已经进入) The domestication of the camel, thought by some scholars to have occurred around the twelfth century B.C., was the key to the development of the spice trade in the ancient world. (被认为已经发生了;先发生;后被提出认为是如此发生的) The Western world’s love affair with chocolate is well-documented:few people have been known to taste it for the first time without requesting more.(在第一次尝时就已经被知道会在要更多, 没有时间先后的观念在句子中) Balzac drank more than fifty cups of coffee a day and died of caffeine poisoning;however, caffeine did not seem to bother. (当时咖啡因对他没有影响, 没有时间先后的观念在里面) 一点点浅见分享 |