og49（关于现在分词作状语的问题）

蓝飞

但是在XDF里,说的是which指代前面的宾语,而doing形式是指代前面整个句子,基于这一点在这个句子里应该用doing形式．但是og里的解释：which appears to refe vaguely back to everything that has preceded it instead of referring to a specific noun.这里的解释实在是不清楚，请ＮＮ指教

songlovegt

是说which被错误的使用去指代前边所有的论述即整个句子的内容，而which只能指代一特定的名词

JamesYi

后面的-ing的逻辑主语是前面整个句子所描述的事情，而不是仅仅的一个名词。

因为which 无法指代整个事情，所以不能用which.

cjwbhu

这题与OG11-43有异曲同工之妙:

43.Five fledgling sea eagles left their nests in western Scotland this summer, bringing to 34 the number of wild birds successfully raised since transplants from Norway began in 1975.

(A) bringing

(B) and brings

(C) and it brings

(D) and it brought（A）

(E) and brought

现在分词位于句尾，状语，做伴随动作的结果，整个句子是原因，导致XX发生。

而这里是it不能指代前面的句子，71是which不能指代前面的句子，这里连to 34和to12 都一样的提前了，大家可以好好体会下。

448258130

epithumia 发表于 2004-9-9 13:00
So, 不会是moons自己去double,而是这个发现所做的.所以本答案含未划线部分原句为: doubling the number  ...

神人；；；；；；

flhuihui1001

这道题,ing的用法应该是下面的case2 中的1情况：
How to use“clause, +ing” comstruction
Case 1. -ing modifies a noun in the clause. Comma+ing follows the Touch Rule as a noun modifier.
   1) -ing modifies the subject
      Rushing to catch her plane, Bridget left the party. (-ing describe Bridget = rushing)   
  2) -ing modifiesthe object
       I go to a party, dying down. (-ing describe the party = dying down)


Case 2. -ing modifies the preceding whole clause.In this case, -ing applies to the subject of the preceding clause and has nothing to do with the Touch Rule(Touch rule is only available for noun modifier!).
   1)   -ing indicates a result of the preceding clause and applies to the subject, that is, the subject is aperson/thing whose action is responsible for the result described in the -ing modifier, but the subject is not the direct doer of the -ing action.
        Eg: Jam broke the window, angering his father. (Jam didn't anger hisfather directly but his action angered his father)
   2)   -ing indicates a simultaneous,but lower-priority, action and applies to the subject.
       Eg: I write my paper, sitting on my favorite chair

Reference: http://www.knewton.com/blog/gmat/2011/07/11/what-to-memorize-for-the-gmat-5-more-must-know-rules/
                  http://www.manhattangmat.com/forums/regarding-comma-verbing-t11652.html

这里doubling作为adverbial modifier 修饰的是前面整个句子，表示结果，逻辑上的主语是camera,但并不是说camera直接行动去double了卫星数量，而是说 cameras detected six  moons circling Uranus 这整个动作double了数量。