OG第一题的分词短语问题，谢谢答复

sheilabravo

21。Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are now drawing solid conclusions about how the human brain grows and how babies acquire language.
(A) Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are
(B) Neuroscientists, having amassed a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
(C) Neuroscientists amassing a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
(D) Neuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood,
(E) Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood,
答案是A
OG对D项的解释: The final descriptor in present tense,now drawing conclusions....does not fit the opening clause, which is in present-prefect tense(have amassed a wealth)and seems to midify adulthood.

那还想请问，既然这里没有主系表结构，分词短语为什么也会有做定语修饰adulthood的嫌疑？因为og第一题的c项，就是我第一个问题里面，og的解释是分词短语不能做定语修饰前面这个名词的啊，这里怎么又可以做定语修饰前面的名词了呢?og解释岂不是矛盾？

求高人指点。。。

-- by 会员 guoshanche (2010/11/2 20:54:13)

Band 前没谓语
C同B
D改变句子意思
E把插入语去掉 Neuroscientists have amassed　now drawing solid conclusions about how the human brain grows and how babies acquire language.长得就不对

sheilabravo

30。For members of the seventeenth-century Ashanti nation in Africa, animal-hide shields with wooden frames were essential items of military equipment, a method to protect warriors against enemy arrows and spears.

(A) a method to protect

(B) as a method protecting

(C) protecting

(D) as a protection of

(E) to protect

答案是c,og的解释；protecting properly introduces a modifying phrase revealing the purpose of the items.  就是做定语从句吧。

1. The Glass House Mountains in Queensland, Australia
, were sighted in 1770 by the English navigator Captain James Cook, by whom they were named supposedly because its sheer wet rocks glistened like glass.

(A) by whom they were named supposedly because its

(B) by whom they were named supposedly and their

(C) naming them supposedly since their

(D) who so named them supposedly because their

(E) who so named it since supposedly their

c 是错误的  除了since的问题以外，分词naming不能做定语从句了，og的解释: as the object of a preposition and not the subject of the clause,james Cookdoes not work as the noun that the verbal phrase beginning with naming can describe.

请问，为什么30题分词短语可以做定语从句，1题的分词短语为什么不能做定语从句呢？

谢谢答复

-- by 会员 guoshanche (2010/11/2 19:25:17)

主语是The Glass House Mountains 和naming不对称，另外since也不好。
第一题主语是盾，不是method
LZ可以看看我发的分词总结http://forum.chasedream.com/GMAT_SC/thread-502926-1-1.html

jbc88

OG说 since 丧失 重要的偶然逻辑？！

这莫非就是你们所谓的“不好”？

谁来说说because怎么体现了重要的偶然逻辑？

呵呵。这不欲加之罪么？