Example of Prepositional Phrase as Adjective: How to Use Them

An example of a prepositional phrase as adjective is the phrase “with the red cover” in the sentence “The book with the red cover is mine.” Here the preposition with heads the phrase with the red cover, and the whole phrase describes the noun book, telling you which book is meant. A prepositional phrase functioning as an adjective is simply a preposition plus its object (usually a noun or pronoun) that together modify a noun or pronoun. Because it answers the question which one? about a noun, it does the same job a single-word adjective does, just with more detail.

What Is an Adjectival Prepositional Phrase

A prepositional phrase has two core parts: a preposition (such as in, on, with, under, from, or near) and its complement, typically a noun phrase. According to Wikipedia’s overview of adpositional phrases, the preposition acts as the head of the phrase, and the complement is the object of that preposition, often a noun, pronoun, or gerund.

When such a phrase modifies a noun, it is functioning adjectivally. That means it behaves like an adjective: it narrows or identifies the noun it attaches to rather than describing an action. A key test is what the phrase describes. If it tells you which person, place, or thing is meant, it is adjectival.

Adjectival prepositional phrases almost always follow the noun they modify, which is why they are sometimes called postmodifiers. Consider these short illustrations:

• The woman in the blue coat — the phrase in the blue coat identifies which woman.
• A house on the hill — the phrase on the hill identifies which house.
• The keys to the office — the phrase to the office identifies which keys.

In each case, removing the phrase leaves a grammatically complete noun but loses essential identifying information. That is the hallmark of an adjective phrase at work.

Examples in Sentences

The clearest way to learn this pattern is to see it labeled. In the examples below, the adjectival prepositional phrase is shown in bold, and the noun it modifies is underlined.

1. The girl with the violin is my cousin.
   • with the violin modifies girl — it tells you which girl.
2. I bought a cake from the bakery on Main Street.
   • from the bakery modifies cake — it tells you which cake.
3. The students in the front row finished first.
   • in the front row modifies students — it identifies the group.
4. Anyone without a ticket must wait outside.
   • without a ticket modifies anyone — it restricts who is included.
5. The letter on the table is addressed to you.
   • on the table modifies letter — it points to one specific letter.

Notice that every phrase follows its noun directly. Merriam-Webster’s entry for preposition confirms that a preposition links its object to another word in the sentence, and in these cases that link is to a noun rather than a verb.

A Worked Example

Take the sentence: “The dog in the yard barked at the mail carrier.”

Ask what in the yard describes. It does not describe how the dog barked (that would be adverbial). It tells you which dog, so it attaches to the noun dog and is adjectival. The phrase at the mail carrier, by contrast, tells you what the dog barked at, so it modifies the verb barked and is adverbial. One sentence, two prepositional phrases, two different jobs — a useful contrast to keep in mind.

Adjective vs Adverb Phrases

The single most reliable distinction is what the phrase modifies: a noun or a verb. An adjective prepositional phrase answers which one? about a noun. An adverb prepositional phrase answers where?, when?, how?, or why? about a verb, an adjective, or another adverb.

Compare: “The flowers in the vase are fresh” versus “She arranged the flowers in the vase.” In the first, in the vase identifies which flowers — adjectival. In the second, in the vase tells where she arranged them — adverbial.

A quick two-step test works almost every time. First, locate the phrase. Second, ask which word it is giving information about. If that word is a noun, the phrase is adjectival. If it is a verb, the phrase is adverbial. When a phrase is ambiguous, context decides, which is why reading the full sentence matters.

Placement and Usage Tips

Adjectival prepositional phrases are flexible but not random. In standard English, they sit immediately after the noun they modify. Placing them too far away creates confusion about what is being described.

• Keep the phrase next to its noun. “The report on climate change was released” is clear; moving the phrase away can make readers attach it to the wrong noun.
• Avoid stacking too many. One or two phrases after a noun read smoothly. Three or more can bog a sentence down: “the box on the shelf in the corner of the room by the door.”
• Watch for misplacement. In “I saw the man with the telescope,” the phrase could describe the man or the seeing. Rephrase if the meaning is unclear.
• Do not confuse it with a complement. Some verbs require a specific preposition (depend on, listen to). Those phrases are tied to the verb, not the noun.
• Use them for economy. They often replace a full relative clause: “the house that is on the hill” becomes “the house on the hill.”

For more on how these phrases fit into sentence structure, the Purdue Online Writing Lab is a solid reference on prepositions and their functions.

Key Takeaways

• An adjectival prepositional phrase is a preposition plus its object that modifies a noun or pronoun.
• It answers which one? about the noun, just as a single-word adjective would.
• In English it almost always follows the noun it modifies.
• The core test: if the phrase describes a noun, it is adjectival; if it describes a verb, it is adverbial.
• Keep the phrase next to its noun, limit how many you stack, and rephrase when placement causes ambiguity.