Answer :
Running is not necessary, since we have plenty of time.
Running is appositive phrases
plenty of time ---- prepositional phrases
What Is an Appositive Phrase?
An appositive phrase redefines, renames, or modifies a noun with essential or nonessential information. Basically, appositives clarify a noun with another noun or phrase that gives a noun extra context.
Prepositional phrases :
A phrase is a group of words consisting of a preposition, its object, and any words that modify the thing . Most of the time, a phrase modifies a verb or a noun. These two sorts of prepositional phrases are called adverbial phrases and adjectival phrases, respectively
A phrase starts with a preposition and ends with a noun or a pronoun. samples of prepositional phrases are “in our house” and “between friends” and “since the war.
Learn more about the prepositional phrases :
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