In which sentence is the underlined phrase an adverb prepositional phrase? An airport on Rarotonga is a destination for tourists
to the Cook Islands. The Cook Islands stretch over 800 miles. The biggest industry of the Cook Islands is tourism, which brings in more revenue than exporting fish and fruit. The Cook Islands is a group of 15 small volcanic islands.
The answer to your question would be that the sentence in which the underlined phrase is an adverb prepositional phrase is the following one: The Cook Islands stretch over 800 miles. In this case, the adverb prepositional phrase is "over 800 miles".
A PP can function in three ways in a sentence: It can function as an adjective, a noun, or as an adverb. When it functions as an adverb phrase, it tells us something as regards the relantionship between the object of the PP and the verb. If the PP answers any of these questions about the verb in the sentence: when, where, why, how, to what extent, under what conditions; the PP functions as an adverb phrase. In the example, the PP tells something about the extent of the Cook Islands (the area streches over 800 miles).
