What is the prepositional phrase? "Without sugar, the blueberries were too sour for the dinner guest.

Question

Also what is the object of the preposition and the word it modifies?

Answer 1

Technically, any preposition and a noun it governs constitute a prepositional phrase. That makes 2 prepositional phrases in the sentence, which are “without sugar” and “for the dinner guest”. Prepositional phrases may serve as modifiers for other words in the text. Since the question is to find a prepositional phrase that modifies a word in the sentence, the one we are looking for will be “without sugar”, which modifies “blueberry” as an attribute (What sort of blueberries? Which blueberries? – The ones without sugar.)

Answer 2

Actually, the prepositional phrase is “Without sugar,” the preposition without and its object sugar working together to modify blueberries. For is also a preposition, with the object guest, but its phrase isn’t modifying another noun in this sentence.

Answer 3

The prepositional phrase in this sentence is "for the dinner guest." The object of the preposition is "the dinner guest."