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的解释为 the final descripor in the present tense, now drawing conclusion...does not fit the opening clause, which is in present-perfect tense(have amassed a wealth..) and seems to modifey adulthood.
为什么 doing 不能跟在have done 的后面呢， 各位大仙给解释一下呗 谢谢谢谢～～～作者: bradfordchen 时间: 2011-8-25 20:59
这里的doing只有两种用法，表示伴随或者结果。表伴随的话，不能用一个正在进行的动作表示一个已经完成的动作。。。
表结果的话，从逻辑上来看，drawing solid conclusions并不是 amassed a wealth of knowledge 的结果。作者: 778879147 时间: 2011-8-26 06:21
我有一点不明白，在解释D项
The final descriptor in present tense, now
drawing conclusions ... does not fit the
opening clause,
which is in present-perfect
tense (have amassed a wealth ...) and seems
to modify adulthood.
为什么是只修饰adulthood作者: vansonkated 时间: 2011-8-31 20:09
