No. "By" is a preposition, but it is not a phrase.
Yes, the word "by" is a prepositional phrase. No, the word "by" is a preposition; a prepositional phrase including the word "by" would be "... by the wayside."
The word that introduces a prepositional phrase is a preposition.
Generally, the last word of a prepositional phrase is the "object of the preposition."
I'm not sure if your question is whether a prepositional phrase is the same thing as a word group, or if "group" is a prepositional phrase. The answer is no in either case. A word group must express a complete thought. A prepositional phrase is part of a sentence and it has to start with a preposition. "In the group" is a prepositional phrase beginning with the preposition "in."
No. "By" is a preposition, but it is not a phrase.
No. Into is a word. It is a preposition. A phrase is more than one word, so a prepositional phrase will have more than one word eg into the woods.
A prepositional phrase contains more than one word and is introduce by a preposition, which your is not.
no its not!
No.
No beneath is a proposition. A phrase is two or three words not one word. beneath the waves - is a prepositional phrase.
No, the word "yesterday" is not a prepositional phrase. It is an adverb that refers to the day before today. Prepositional phrases consist of a preposition and a noun or pronoun that functions as its object.
Almost is an adverb.A phrase is more than one word so a prepositional phrase has two or three or more words.I saw the book under the table.In this sentence under the tableis a prepositional phrase.