SC : PT : Carbon Dioxide : GMAT Sentence Correction (SC)
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# SC : PT : Carbon Dioxide

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Director
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SC : PT : Carbon Dioxide [#permalink]

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08 May 2005, 15:04
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An Excellent Question:

According to some experts, carbon dioxide is accumulating in the atmosphere so rapidly, largely because of the burning of fossil fuels, that should the present rate of buildup continue, the global concentration of this poison will double by the end of the next century.

(A) that should the present rate of buildup continue, the global concentration of this poison
(B) should the present rate of buildup continue, the global concentration of this poison
(C) should the present rate of buildup be continued, the global concentration of this poison
(D) the global concentration of this poison, were the present rate of buildup continue,
(E) that the global concentration of this poison, if the present rate of buildup did continue,
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VP
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Re: SC : PT : Carbon Dioxide [#permalink]

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08 May 2005, 15:22
(A) that should the present rate of buildup continue, the global concentration of this poison
Director
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08 May 2005, 15:37
One more for 'A'

We need 'so rapidly.......that', so between A & E, A is better
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08 May 2005, 21:18
sonaketu wrote:
Can someone refute E.

consider the followings:
(E) that the global concentration of this poison, if the present rate of buildup did continue.

present and did?
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09 May 2005, 00:05
I'll go with (E) on this one. The phrase "if the present rate of buildup did continue" serves to modify 'concentration of this poison'. Removing the second phrase, will make the original sentence:

According to some experts, carbon dioxide is accumulating in the atmosphere so rapidly, largely because of the burning of fossil fuels, that the global concentration of this poison will double by the end of the next century

I did not find 'did' offending. In hypothetical situations, it is common to use a past tense. E.g. "If I were rich, I would ..."
Director
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09 May 2005, 00:13
ywilfred wrote:
I'll go with (E) on this one. The phrase "if the present rate of buildup did continue" serves to modify 'concentration of this poison'. Removing the second phrase, will make the original sentence:

According to some experts, carbon dioxide is accumulating in the atmosphere so rapidly, largely because of the burning of fossil fuels, that the global concentration of this poison will double by the end of the next century

I did not find 'did' offending. In hypothetical situations, it is common to use a past tense. E.g. "If I were rich, I would ..."

IMO E would have been correct if it were "if the present rate of buildup does continue" or better still "if the present rate of buildup continues"

you can never jump two tenses (past to future) in conditionals
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09 May 2005, 01:48
Since the sentence is subjunctive, "continue" is the right usage. But did was not required.
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09 May 2005, 07:05
A

(A) that should the present rate of buildup continue, the global concentration of this poison should...will... is idiomatic

(E) that the global concentration of this poison, if the present rate of buildup did continue, did makes this sentence wrong (if....were...to continue is correct)
Director
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09 May 2005, 14:54
Yes it is between (A) and (E).

When I was attempting this question, I picked (E). I was racing against time and as soon as I saw "should", I eliminated it thinking that we need an Independent clause (Not any dependent Clause or sth else). I did not bother to read the whole sentence.

While revising, I observed that portion after "should" is an Independent Clause. It is an Subject-Verb Inversion. This question befooled me successfully .
Director
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09 May 2005, 14:54
Of course OA is (A).
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10 May 2005, 04:25
Vithal wrote:
IMO E would have been correct if it were "if the present rate of buildup does continue" or better still "if the present rate of buildup continues"

you can never jump two tenses (past to future) in conditionals

What is the "tense" for "would"? Isnt it future tense, no? Or is it only used to describe "hypothetical situations"? But every verb/participle should have a tense, right? So wouldnt "would" be future tense?

If i were [past tense] you, I would [future tense???] take the job offer?
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10 May 2005, 16:11
gmataquaguy wrote:
Vithal wrote:
IMO E would have been correct if it were "if the present rate of buildup does continue" or better still "if the present rate of buildup continues"

you can never jump two tenses (past to future) in conditionals

What is the "tense" for "would"? Isnt it future tense, no? Or is it only used to describe "hypothetical situations"? But every verb/participle should have a tense, right? So wouldnt "would" be future tense?

If i were [past tense] you, I would [future tense???] take the job offer?

http://cctc.commnet.edu/grammar/conditional.htm

would is an auxillary verb and can be used to express past - the following link will help in getting a better understanding:
http://cctc.commnet.edu/grammar/auxiliary.htm
10 May 2005, 16:11
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