看这个,后面-ing主语应该跟句子主语一致
在白勇书里,ing分词短语在句末
1)伴随动作:状态和功能,与句子的谓语动作同时发生,逻辑主语等于主句主语
2)伴随结果,整个句子是原因,到时分词动作产生,无逻辑主语
如果不明白建议看这个帖
http://forum.chasedream.com/GMAT_SC/thread-650744-4-1.html
-- by 会员 pinkking (2012/8/1 0:16:45)
97. Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "population bottleneck"—at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.
(A) at some time in the past our ancestors suffered an event, greatly reducing their numbers
(B) that at some time in the past our ancestors suffered an event that greatly reduced their numbers
(C) that some time in the past our ancestors suffered an event so that their numbers were greatly reduced,
(D) some time in the past our ancestors suffered an event from which their numbers were greatly reduced
(E) some time in the past, that our ancestors suffered an event so as to reduce their numbers greatly,
答案选c
选项a中有句解释不太理解
The structure makes that clause appera to be an awkward and rhetorically puzzling suparate assertion that the writer has appended to the prior claim about what the anthropologists believe. The agent or cause of reducing is unclear.
求大牛小牛们指点~~谢谢~~
-- by 会员 靓linda (2012/7/31 23:48:25)
对A的解释看不明白,难道 reducing their numbers and thus our genetic variation不是our ancestors suffered an event的结果吗?
在Ving的用法里面 S+V+O,Ving的用法有两个嘛,一个是describe the clause,对前一个分句作 补充说明,另一个是present result of the clause
这个难道不是第二种用法吗?
还有,OG对A的解释:that的缺失使得后一个claim是谁发出的显得unclear, 似乎是作者附加上去的信息。这又是为毛?谁给解释一下啊?
-- by 会员 冷辰 (2012/8/5 14:44:23)