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# Astronomers have theorized that the Big Bang governs the

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SVP
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Astronomers have theorized that the Big Bang governs the [#permalink]

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28 Nov 2007, 11:00
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Astronomers have theorized that the Big Bang governs the behavior of interstellar dust, particles that comprise the atoms and molecules created in the progenitive explosion and persisting in even the emptiest regions of space.

a) persisting
b) persists
c) persisted
d) they persiste
e) are persisting

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Manager
Joined: 01 Oct 2007
Posts: 86

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28 Nov 2007, 11:22
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tarek99 wrote:
Astronomers have theorized that the Big Bang governs the behavior of interstellar dust, particles that comprise the atoms and molecules created in the progenitive explosion and persisting in even the emptiest regions of space.

a) persisting
b) persists
c) persisted
d) they persiste
e) are persisting

A. There are two modifying phrases describing the atoms and molecules: created in the progenitive explosion and persisting in even the emptiest regions of space. Parallelism demands that each begin with a participle.

The past participle persisted would be inappropriate, because atoms and molecules is the subject, not the object, of persist. (They were created, but they persist.) The present participle--persisting--is correct when forming a modifier that specifies an action performed by the modified noun.

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SVP
Joined: 21 Jul 2006
Posts: 1509

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28 Nov 2007, 12:06
The OA is indeed A. johnrb, your explanation was brilliant! i don't think there could be other explanations much clearer than this! you really seem to know grammar technically well. how good are you with grammar?

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Director
Joined: 26 Mar 2006
Posts: 628

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28 Nov 2007, 17:39
johnrb wrote:
tarek99 wrote:
Astronomers have theorized that the Big Bang governs the behavior of interstellar dust, particles that comprise the atoms and molecules created in the progenitive explosion and persisting in even the emptiest regions of space.

a) persisting
b) persists
c) persisted
d) they persiste
e) are persisting

A. There are two modifying phrases describing the atoms and molecules: created in the progenitive explosion and persisting in even the emptiest regions of space. Parallelism demands that each begin with a participle.

The past participle persisted would be inappropriate, because atoms and molecules is the subject, not the object, of persist. (They were created, but they persist.) The present participle--persisting--is correct when forming a modifier that specifies an action performed by the modified noun.

Good grammatical explanations...Actually I was going for 'are persisting'

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Re: SC: Tenses   [#permalink] 28 Nov 2007, 17:39
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# Astronomers have theorized that the Big Bang governs the

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