http://www.time.com/time/nation
OG12 SC21 DE选项如何修改
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,
D，E OG的解释是：D，E当中前半句使用的是现在完成时，后半句使用一般进行时，时态前后不符。 我觉得前面用现在完成时没问题，
因为时间标志是over the past twenty years。 如果要改这D，E，是不是把前半句现在完成时改成一般进行时就行了？？
-- by 会员 y2k01y2ko1 (2010/12/3 15:57:38)
B having...为后置定语，over the past 20 y放在adulthood后引起歧义，与原句不福。且and前句主句没有平行对应。
C 同上
D 主句现在完成时，没错。但是原句指神经学家通过积累。。。的过程，draw conclusion，而D E用结果状语表示是精神学家已经积累这么久的知识draw conclusion，主谓逻辑错误，是人draw conclusion,不是事实draw.所以错
E 同上
希望你同意我的观点 | 
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发表于 2010-12-3 15:57:38
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