两道OG的题目比较

mongmong

刚刚check了一下，OG12-21上的解释说是错的。。

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.

但凡遇到不肯定错误的语法点，先presume它是对的比较好，统计上犯Type I error的几率比较小。。

-- by 会员 aeoluseros (2012/4/11 17:48:30)

明了，多谢你~~

呓语

我感觉
21题D选项 drawing 这个动作明显是发生在amass 之后，既然amass用完成时态 have amassed，那么draw的时态应该更后面一些

78题的D选项 fossils  have been dated at 34 million years old, making the sloth the earliest known mammalon 中，making修饰整个前面的句子， making the sloth the earliest known mammalon就类似于高中的语法which makes the sloth the earliest known mammalon，这个which 是  fossils  have been dated at 34 million years old 这个句子的先行词，但是GMAT中 which 不能指代整个句子所以用 making来替代，所以making与前面句子的时态应该是没有关系的。

不是牛人，所以不太确定是不是这样，希望有帮助~

PS：看很多人说21题D选项是错在句子重心，我上新东方的老师也说句子重心骗了一般是错的。但是OG上面的解释貌似没这么说过，且我遇到与A选项句子重心不一样的题（暂时找不到了），有些题是根据句子意思来确定重心的。
现在就不太确定到底句子重心问题算不算排除错误选项的方法。

aeoluseros

刚刚check了一下，OG12-21上的解释说是错的。。

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.

但凡遇到不肯定错误的语法点，先presume它是对的比较好，统计上犯Type I error的几率比较小。。

-- by 会员 aeoluseros (2012/4/11 17:48:30)

明了，多谢你~~

-- by 会员 mongmong (2012/4/11 18:03:54)

sorry，对OG12-21的解释误读了，它说得也未免太过含糊了些。我重新写了一下，mongmong再看看：
OG对D选项的解释并不是说“现在分词做状语不可以伴随修饰完成时态”，而是指drawing不是have amassed的直接结果，所以无法drawing无法做have amassed的伴随结果（现在分词做伴随起到伴随状态和伴随结果两种功能，前者表示与主句动作同时发生，后者需要是主句动作的直接结果。当被修饰主句已经是完成时态，那么后面的现在分词本身就不可能再与主句动作发生在同一时刻，所以无法以“伴随状态”的身份出现，只可能行使“伴随结果”的功能）

mongmong

刚刚check了一下，OG12-21上的解释说是错的。。

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.

但凡遇到不肯定错误的语法点，先presume它是对的比较好，统计上犯Type I error的几率比较小。。

-- by 会员 aeoluseros (2012/4/11 17:48:30)

明了，多谢你~~

-- by 会员 mongmong (2012/4/11 18:03:54)

sorry，对OG12-21的解释误读了，它说得也未免太过含糊了些。我重新写了一下，mongmong再看看：
OG对D选项的解释并不是说“现在分词做状语不可以伴随修饰完成时态”，而是指drawing不是have amassed的直接结果，所以无法drawing无法做have amassed的伴随结果（现在分词做伴随起到伴随状态和伴随结果两种功能，前者表示与主句动作同时发生，后者需要是主句动作的直接结果。当被修饰主句已经是完成时态，那么后面的现在分词本身就不可能再与主句动作发生在同一时刻，所以无法以“伴随状态”的身份出现，只可能行使“伴随结果”的功能）

-- by 会员 aeoluseros (2012/4/28 1:14:55)

谢谢斑竹~这样更清楚了。
现在分词做状语不表示伴随状态,只能表示直接结果的伴随。
请问这里的直接结果的verb通常是“无实意的动词”，比如bringing (the number of ... to 34)-OG47, making (the sloth the earliest known mammal...)-OG78吗？如果是drawing solid conclusions这样的“实意的动词”，就不是直接结果了。（我忘记在哪个帖子看到过，把OG里所有的现在分词做状语的正确句子拎出来看一看就有体会。）

aeoluseros

是从逻辑上理解是否直接结果的哦。我们都知道："积累amass"，并不一定能够得出结论"drawing conclusion"。所以drawing就不是amass的直接结果了。

aeoluseros

我感觉
21题D选项 drawing 这个动作明显是发生在amass 之后，既然amass用完成时态 have amassed，那么draw的时态应该更后面一些

78题的D选项 fossils  have been dated at 34 million years old, making the sloth the earliest known mammalon 中，making修饰整个前面的句子， making the sloth the earliest known mammalon就类似于高中的语法which makes the sloth the earliest known mammalon，这个which 是  fossils  have been dated at 34 million years old 这个句子的先行词，但是GMAT中 which 不能指代整个句子所以用 making来替代，所以making与前面句子的时态应该是没有关系的。

不是牛人，所以不太确定是不是这样，希望有帮助~

PS：看很多人说21题D选项是错在句子重心，我上新东方的老师也说句子重心骗了一般是错的。但是OG上面的解释貌似没这么说过，且我遇到与A选项句子重心不一样的题（暂时找不到了），有些题是根据句子意思来确定重心的。
现在就不太确定到底句子重心问题算不算排除错误选项的方法。

-- by 会员 呓语 (2012/4/22 16:51:07)

大部分句子都有一个最合理的"重心"，只是考场要用这一点来解题需要比较强的阅读能力。如果有一遍读明白句子含义的能力，这绝对是个好办法，尤其是针对长划线句，因为长划线句常常都有句子重心改变以至于不当的情况。

mongmong

是从逻辑上理解是否直接结果的哦。我们都知道："积累amass"，并不一定能够得出结论"drawing conclusion"。所以drawing就不是amass的直接结果了。

-- by 会员 aeoluseros (2012/4/28 12:28:25)

多谢aeo童鞋，我再体会体会

呓语

我感觉
21题D选项 drawing 这个动作明显是发生在amass 之后，既然amass用完成时态 have amassed，那么draw的时态应该更后面一些

78题的D选项 fossils  have been dated at 34 million years old, making the sloth the earliest known mammalon 中，making修饰整个前面的句子， making the sloth the earliest known mammalon就类似于高中的语法which makes the sloth the earliest known mammalon，这个which 是  fossils  have been dated at 34 million years old 这个句子的先行词，但是GMAT中 which 不能指代整个句子所以用 making来替代，所以making与前面句子的时态应该是没有关系的。

不是牛人，所以不太确定是不是这样，希望有帮助~

PS：看很多人说21题D选项是错在句子重心，我上新东方的老师也说句子重心骗了一般是错的。但是OG上面的解释貌似没这么说过，且我遇到与A选项句子重心不一样的题（暂时找不到了），有些题是根据句子意思来确定重心的。
现在就不太确定到底句子重心问题算不算排除错误选项的方法。

-- by 会员 呓语 (2012/4/22 16:51:07)

大部分句子都有一个最合理的"重心"，只是考场要用这一点来解题需要比较强的阅读能力。如果有一遍读明白句子含义的能力，这绝对是个好办法，尤其是针对长划线句，因为长划线句常常都有句子重心改变以至于不当的情况。

-- by 会员 aeoluseros (2012/4/28 12:30:57)

谢谢斑竹~~~~~~~

wangjieava23

呵呵。没想到这么优秀的帖子，时间这么近。