A prepositional phrase begins with a preposition and ends with its object. The object is usually a noun, a pronoun, or a noun phrase. In in the kitchen, in is the preposition and the kitchen is the object. In with her, with is the preposition and her is the object. A prepositional phrase does not stand alone in the same way a sentence does. It links one part of the sentence to another and adds information about time, place, direction, or another relationship. For more about the words that start these phrases, see Prepositions.

Common meanings of prepositional phrases

Usage	Explanation	Example
Place	Use this meaning when a prepositional phrase shows where something is located.	The keys are on the table.
Time	Use this meaning when a prepositional phrase shows when something happens.	We will meet after lunch.
Direction	Use this meaning when a prepositional phrase shows movement toward a place.	She walked into the room.
Manner	Use this meaning when a prepositional phrase shows how an action happens.	He spoke with confidence.
Reason	Use this meaning when a prepositional phrase shows why something happens.	They left because of the rain.

Prepositional phrases can show where something is, when something happens, how something is done, where something moves, or why something happens. At the station gives place. In the morning gives time. To the office shows direction. With care shows manner. For a mistake gives reason. The same preposition can express different meanings in different sentences, so the whole phrase matters, not just the preposition by itself. In on the table, on shows place. In on Monday, on shows time.

Typical positions of prepositional phrases

Example	Pattern
We stayed at home last night.	A prepositional phrase usually comes after the verb when it adds information about place or time.
The book on the shelf is mine.	A prepositional phrase can come after a noun when it gives more detail about that noun.
I put my phone in my bag.	A prepositional phrase can come at the end of a sentence when the detail feels natural there.
In the morning, I usually go for a walk.	A prepositional phrase can come at the beginning of a sentence when you want to highlight it.

Prepositional phrases usually come after the word they describe. After a verb, they often tell where, when, or how an action happens: She waited at the door and They left in the afternoon. After a noun, they add extra detail about that noun: the man in the red coat or a book about history. A sentence can contain more than one prepositional phrase, and they can appear in different parts of the sentence when the meaning stays clear. Their position affects what they modify, so the girl with the telescope and the girl on the hill do not describe the same thing.

Some verbs need a particular preposition after them. English does not choose these combinations by form alone, so the whole verb + preposition pattern must be learned. Interested in shows the thing that attracts attention: She is interested in music. Good at shows skill: He is good at chess. Worried about shows concern: They are worried about the exam. These phrases are common in speaking and writing, and the preposition is part of the verb pattern, not a separate idea. For more on how prepositions work in general, see Prepositions.

Noun phrases with added detail

Usage	Explanation	Example
Location after a noun	Use a prepositional phrase to show where the noun is.	The cafe near the park is open late.
Purpose after a noun	Use a prepositional phrase to explain what something is for.	This is a bag for school.
Connection after a noun	Use a prepositional phrase to show a link between two nouns.	The idea of a new project sounds exciting.
Description after a noun	Use a prepositional phrase to give extra information about a noun.	The girl with the red bike lives next door.

A noun can be followed by a prepositional phrase to add important detail. The phrase may show location, purpose, material, connection, or topic. The house on the corner gives location. A key for the door gives purpose. A ring of silver gives material. The teacher of the class gives connection. A discussion about travel gives topic. The prepositional phrase belongs to the noun before it, so it tells you which house, which key, or which discussion is meant. Without the phrase, the noun is still grammatical, but the meaning is less specific.

Object pronouns after prepositions

Example	Pattern
This gift is for her.	Use object pronouns after a preposition, not subject pronouns.
The message is from me.	Use me after a preposition when the pronoun refers to the speaker.
The waiter brought water for us.	Use us after a preposition when the pronoun refers to the speaker and other people.
The notes are for them.	Use them after a preposition when the pronoun refers to other people.

A pronoun after a preposition must use the object form. Say for me, with him, to her, between us, and without them. The subject forms I, he, she, we, and they do not follow prepositions. The preposition needs the object form because the pronoun is the object of that preposition. This rule applies in phrases like to us, from her, and about me.

Some prepositional phrases are fixed expressions, so the preposition cannot be changed in normal English. People say at night, not in night; by chance; and on purpose. Other phrases look similar but mean different things. In time means early enough to do something, while on time means at the expected hour. At school refers to being there as part of regular activity, while in school often means enrolled as a student. These patterns are part of natural English usage, and many appear frequently in Prepositions and in everyday sentence structure.