The subject of the sentence is sometimes a prepositional phrase.

True or False
I say true as my answer

This is definitely false.

Prepositional phrases are never subjects or verbs. The act as adjectives and adverbs.

Your answer is correct! Sometimes, the subject of a sentence can indeed be a prepositional phrase. In order to determine whether this is the case, you need to identify the subject of the sentence first. The subject is the noun or pronoun that the sentence is about. However, in some sentences, the subject can be a prepositional phrase, which consists of a preposition (such as "in," "on," or "with") followed by a noun or pronoun object. To determine the subject, you can ask yourself "Who or what is doing or being the action in the sentence?" If the answer is a prepositional phrase, then the subject is the noun or pronoun object of that phrase.