Help : Prep08 202 关于比较

DylanYue

请问：The amount of pollutant emitted by A is twice as much as that emitted by B 等价于 the amount of pollutant emitted by A is twice as much as is emitted by B吗？
后者这种比较该怎么理解呢？ 谢谢了。

DesmondWang

嗯，我觉得这两个形式可能都有点问题，但我说不太清楚，我把Ron的解答发给你吧，希望对你有用。
RON:
i think the combination of "amount" and "as much as" would be tagged as redundant and therefore wrong.
i am not 100% on this, as the gmat's usage preferences are rather slippery at times, but there's no doubt that this suggestion is inferior to the version without "as much as".
shorter versions:
amount X is twice as much as amount Y --> inferior, and possibly even wrong (redundant)
amount X is twice amount Y --> undoubtedly better
另外针对你说的“the amount of pollutant emitted by A is twice as much as is emitted by”
RON:the real problem is that "is" has no parallel in the first part of the comparison - i.e., the first part doesn't say "is emitted" or "are emitted" - and so the comparison is wrong.
第二种形式在ron看来是错的，is没有平行的对象
我也得自己研究一下了。。。

DylanYue

嗯，我觉得这两个形式可能都有点问题，但我说不太清楚，我把Ron的解答发给你吧，希望对你有用。
RON:
i think the combination of "amount" and "as much as" would be tagged as redundant and therefore wrong.
i am not 100% on this, as the gmat's usage preferences are rather slippery at times, but there's no doubt that this suggestion is inferior to the version without "as much as".
shorter versions:
amount X is twice as much as amount Y --> inferior, and possibly even wrong (redundant)
amount X is twice amount Y --> undoubtedly better
另外针对你说的“the amount of pollutant emitted by A is twice as much as is emitted by”
RON:the real problem is that "is" has no parallel in the first part of the comparison - i.e., the first part doesn't say "is emitted" or "are emitted" - and so the comparison is wrong.
第二种形式在ron看来是错的，is没有平行的对象
我也得自己研究一下了。。。

-- by 会员 DesmondWang (2012/12/7 22:35:20)

谢谢，我也再研究一下。。。

DylanYue

If the noun is an explicitly numerical quantity, then you should use neither much nor many but twice or double by it self . -----http://www.manhattangmat.com/forums/the-number-of-people-flying-first-t5600.html

e.g. the increase of this year's GDP is twice as much as that of last year's GDP-redundant
      the increase of this year's GDP is twice that of the last year's GDP