OG12 第21题 时间状语over the past twenty years

MaggieChai

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，没有异议。
但是我觉得还是不严谨，请问NN有没有一个考点，是指时间状语的位置引起歧义的，虽然这道题别无选择。
可是over past twenty years 放在knowledge后面，是明确修饰knowledge么，有没有歧义：如果是修饰knowledge,就是积累了过去20年的知识，如果是修饰amass的则是用20年积累的知识。
大家讨论一下，别沉啊，没看到有专门讨论og12新题的帖子。

judydongxueni

好严谨啊

zzp123321

同问
另外D选项中
OG给的答案是
“The final descriptor in the 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.

1.什么叫 does not fit the opening clasuse,如果改成 having drawed conclusions 对吗
2. 为什么 seems to modigy adulthood.         ing形式的分词如果放在句尾，那么逻辑主语不是只能是主句主语，或者没有（来自白勇语法），那么就不可能修饰adulthood啊

新手发问，虚心接受板砖

zlloop

我觉得并没有歧义啊，因为having amassed说明的是一直持续的动作，在这个一直持续的动作发生的同时（20年期间）knowledge也会提高和积累的。

ivyshin00

1.句子的重点是说现在他们能够得出结论，所以应该是前一句作为分词结构
2.个人感觉over the twenty years，是修饰amss这个动作，表示这个动作持续了二十多年。
P.S。
有一个小发现，不知道大家觉得是不是对的。
貌似在og里面：A of B再加一个其他的修饰结构，一般都是修饰A不是B··如果这个是正确的话，原句over the twenty years 不可能修饰wealth了``

个人观点，请大家指正

wudiyeah

我写这题的总结时也有过同样的疑问。。。当时做题时还想以这个作为切入点排除几个。。。没想到5个选项都没动它。。。

candy湘

今天刚做了大全的题，其中有一道就是考的时间状语的放置问题:
53.    According to the National Pasta Association, per-capita consumption of pasta in the United States, which has already been approaching 19 pounds a year, will achieve 30 pounds a year by the twenty-first century.
(A) According to the National Pasta Association, per-capita consumption of pasta in the United States, which has already been approaching 19 pounds a year, will achieve 30 pounds a year by the twenty-first century.
(B) Already approaching 19 pounds a year in the United States, the National Pasta Association predicts that per-capita consumption of pasta will reach 30 pounds a year by the twenty-first century.
(C) The National Pasta association predicts by the twenty-first century that per-capita consumption of pasta in the United States, which is already approaching 19 pounds a year, will reach 30 pounds a year.
(D) By the twenty-first century, the National Pasta Association predicts that per-capita consumption of pasta in the United States, having already approached 19 pounds a year, will reach 30 pounds a year.
(E) According to the National Pasta Association, per-capita consumption of pasta in the United States is already approaching 19 pounds a year and will reach 30 pounds a year by the twenty-first century.

其中对C选项的解释是：by the twenty-first century 位置错
个人的理解就是用逻辑判断出时间状语的位置放错了。

不知道准不准确呢~~~

candy湘

还有，对于你提出的这题，我的理解是“积累的过程用了20年，”所以我特想选B
你觉得B为什么不对啊？
或者换个问法，你是凭什么排除的B呀？

candy湘

我错了……没有看到B中的“and”
真的是别无选择的选了A

candy湘

同问
另外D选项中
OG给的答案是
“The final descriptor in the 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.

1.什么叫 does not fit the opening clasuse,如果改成 having drawed conclusions 对吗
2. 为什么 seems to modigy adulthood.         ing形式的分词如果放在句尾，那么逻辑主语不是只能是主句主语，或者没有（来自白勇语法），那么就不可能修饰adulthood啊

新手发问，虚心接受板砖

-- by 会员 zzp123321 (2010/9/19 8:41:52)

对于你的第二个提问，我做题的时候有一点点感觉，就是S-V-O,doing 这样的句型很难对，尤其O是个名词的情况下，因为至少有三种情况：1、doing是伴随状语修饰了主语S
2、从逻辑上判断doing是结果状语，是S-V-O整个句子导致的结果
3、doing是后置定语修饰前面的宾语O
如果无法由上下文确定其中的某种情况，那就是有歧义的句子