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What was as remarkable as the development of the compact dis

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by RBBmba@2014 » Wed Jun 03, 2015 5:56 am
GMATGuruNY wrote: 2. Verbs should be in the same tense unless a change in tense is required. In A, there is no justification for switching from the past tense (was) to the present perfect (has been). Since C avoids this issue and is free of errors, eliminate A.
Of the three reasons above, reason 2 seems the most straightforward.
Much thanks GMATGuruNY.

Do we have any INDICATORS in GMAT SC that we should be aware of WHEN a change in TENSE is required ?
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by RBBmba@2014 » Fri Jun 05, 2015 3:44 am
RBBmba@2014 wrote:
GMATGuruNY wrote: 2. Verbs should be in the same tense unless a change in tense is required. In A, there is no justification for switching from the past tense (was) to the present perfect (has been). Since C avoids this issue and is free of errors, eliminate A.
Of the three reasons above, reason 2 seems the most straightforward.
Much thanks GMATGuruNY.

Do we have any INDICATORS in GMAT SC that we should be aware of WHEN a change in TENSE is required ?
Hi GMATGuru - any feedback on this ?
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by GMATGuruNY » Sat Jun 06, 2015 3:14 am
RBBmba@2014 wrote:
GMATGuruNY wrote: 2. Verbs should be in the same tense unless a change in tense is required. In A, there is no justification for switching from the past tense (was) to the present perfect (has been). Since C avoids this issue and is free of errors, eliminate A.
Of the three reasons above, reason 2 seems the most straightforward.
Much thanks GMATGuruNY.

Do we have any INDICATORS in GMAT SC that we should be aware of WHEN a change in TENSE is required ?
Look for TIME CLUES: words and phrases that refer to TIME.

SC10 in the OG13:
The widely accepted big bang theory HOLDS that the universe BEGAN in an explosive instant ten to twenty billion years ago.
Here, ten to twenty billion years ago is a time clue, requiring that the second verb (began) be in the past tense, even though the first verb (holds) is in the present tense.
On the GMAT, a change in tense will often be accompanied by this sort of time clue.

Answer choice A would require a change in tense if it read as follows:
What WAS remarkable in the 1970s has SINCE become commonplace.
Here, the time clues in the 1970s and since necessitate a change in tense (from the simple past to the present perfect).
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