Correcting Appositive Errors - GMAT Verbal

This appositive clause (that John Smith is a notable economist at a certain university) is necessary to understand the meaning of the sentence; therefore, it must not be surrounded by commas. If it is surrounded by commas, the identify of the John Smith in the sentence is still not known because he has several other colleagues that go by the same name. Presumably, identifying him as "the notable economist" removes this ambiguity.

This sentence is correct as written. Appositive clauses that supply additional information should be surrounded by commas.

In the sentence, the phrase "a new tool for sports franchises" is an appositive phrase, a phrase that adds extra meaning to the subject "projections," but is not a part of the main subject of the sentence. Any such appositive phrase must be set apart from the rest of the sentence with commas, both before and after the phrase. "The projections, a new tool for sports franchises, gave" is the only answer choice that correctly places commas around the phrase.

In the sentence, "the thirteenth-century philosopher and theologian" is an appositive that renames "Thomas Aquinas"; appositives are set off by commas at both ends, as in the credited response. No comma is needed between "philosopher" and "theologian," however. Because "thirteenth-century" is being used as an adjective in this case a hyphen is needed.

The appositive phrase that renames "John Duns Scotus" is "the most notable Scholastic philosopher of the generation after Aquinas." Commas are required at both ends of this complete phrase to set it off, but commas are not needed before the prepositional phrases "of the generation" or "after Aquinas."

Appositive phrases, which rename a noun, are set off by commas from the rest of the sentence. However, "Richard Melville" is not itself an appositive renaming "the Englishman," as it tells us which Englishman the sentence is talking about, rather than renaming a known Englishman "Richard Melville."

In this case, an appositive comes at the beginning of the sentence, renaming "Richard Melville" as "one such transitional figure" among many. Appositives must be set off by commas from the rest of the sentence if they contain information that is unnecessary for understanding the rest of the sentence. Since taking out the appositive phrase ("One such transitional figure, who worked . . .") yields a complete sentence, the appositive "Richard Melville" must be set apart by commas.

"scheduled to take place at 2:00" is an appositive phrase, adding meaning to the subject "the seminal presentation. Appositive phrases such as these should be offset by commas at both beginning and end. Such phrases often rename the subject of a sentence.

"an early advocate..." is an appositive, further describing, renaming, or defining the subject of the sentence (in this case "Jeremy Bentham" is being classified as "an early advocate for various civil right and liberties"). Appositives such as these should be offset by two commas, one each before and after.

"The music sharing service considered a threat to copyright protection" is a phrase modifying the subject noun "Napster." It is an appositive phrase and should, therefore, be offset by two commas. Appositives define or rename the subject of the sentence, in this case Napster (the subject) is being re-characterized as "the music sharing service considered a threat to copyright protection." The appositive must be offset with commas because it is outside of the fundamental grammatical structure of the sentence.

Appositive clauses that supply additional or optional information must be contained within commas. Since we do not need to know that Melissa is the Treasure of Acme Inc. that information must be contained by commas. The correct answer also uses the active voice.

This appositive clause (that John Smith is a notable economist at a certain university) is necessary to understand the meaning of the sentence; therefore, it must not be surrounded by commas. If it is surrounded by commas, the identify of the John Smith in the sentence is still not known because he has several other colleagues that go by the same name. Presumably, identifying him as "the notable economist" removes this ambiguity.

This sentence is correct as written. Appositive clauses that supply additional information should be surrounded by commas.

In the sentence, the phrase "a new tool for sports franchises" is an appositive phrase, a phrase that adds extra meaning to the subject "projections," but is not a part of the main subject of the sentence. Any such appositive phrase must be set apart from the rest of the sentence with commas, both before and after the phrase. "The projections, a new tool for sports franchises, gave" is the only answer choice that correctly places commas around the phrase.

In the sentence, "the thirteenth-century philosopher and theologian" is an appositive that renames "Thomas Aquinas"; appositives are set off by commas at both ends, as in the credited response. No comma is needed between "philosopher" and "theologian," however. Because "thirteenth-century" is being used as an adjective in this case a hyphen is needed.

The appositive phrase that renames "John Duns Scotus" is "the most notable Scholastic philosopher of the generation after Aquinas." Commas are required at both ends of this complete phrase to set it off, but commas are not needed before the prepositional phrases "of the generation" or "after Aquinas."

Appositive phrases, which rename a noun, are set off by commas from the rest of the sentence. However, "Richard Melville" is not itself an appositive renaming "the Englishman," as it tells us which Englishman the sentence is talking about, rather than renaming a known Englishman "Richard Melville."

In this case, an appositive comes at the beginning of the sentence, renaming "Richard Melville" as "one such transitional figure" among many. Appositives must be set off by commas from the rest of the sentence if they contain information that is unnecessary for understanding the rest of the sentence. Since taking out the appositive phrase ("One such transitional figure, who worked . . .") yields a complete sentence, the appositive "Richard Melville" must be set apart by commas.

"scheduled to take place at 2:00" is an appositive phrase, adding meaning to the subject "the seminal presentation. Appositive phrases such as these should be offset by commas at both beginning and end. Such phrases often rename the subject of a sentence.