What Is a Preposition? Definition, Examples & Guide

If you’ve ever wondered why we say “on the table” but “in the box” — or why “at noon” works but “in noon” doesn’t — you’re already thinking about prepositions, even if you didn’t have the word for it. These small words quietly hold sentences together, showing where things are, when they happen, and how they move through space. This guide breaks down what prepositions are, how they work, and how to spot them in any sentence, drawing on definitions and examples from trusted grammar authorities like Merriam-Webster, Grammarly, and BBC Bitesize.

Primary function: Shows relationship between noun and other words · Typical position: Before noun or pronoun · Common examples: 20 most frequent · Usage contexts: Time, place, direction · Key sources: Merriam-Webster, Grammarly, BBC

The following table gathers authoritative definitions from leading grammar references to establish a solid foundation for understanding prepositions.

What is a preposition and examples?

A preposition is a word that creates a bridge between a noun (or pronoun) and another word in the sentence. Grammarly describes prepositions as “small words that describe relationships with other words” — showing location, time, or direction. Without these bridges, sentences would collapse into disconnected fragments.

According to Merriam-Webster, a preposition typically combines with a noun phrase to form a phrase that modifies another word. BBC Bitesize explains that prepositions “show the relationship between a noun and something else” — a definition that captures their linking role neatly.

Definition from Merriam-Webster and Grammarly

The definition from Merriam-Webster focuses on the grammatical function: prepositions are function words that combine with noun phrases to create modifying phrases. Grammarly takes a more practical angle, emphasizing how prepositions describe relationships — like place (“in a park”) or time (“at noon”). Both definitions point to the same core idea: prepositions connect ideas about space and time to the nouns they modify.

Basic examples in sentences

Each of these sentences demonstrates how a preposition links a noun to another word in the context.

• The cat is under the table.
• We meet at noon.
• She walked toward the door.
• The book is on the shelf.

What are the 10 examples of prepositions?

The ten most common prepositions form the backbone of English communication. Grammar Monster identifies these core prepositions as essential vocabulary for anyone learning English, whether child or adult.

Single-word prepositions

The ten single-word prepositions most frequently used in everyday English appear in these example sentences.

• in — The book is in the bag.
• on — The plate is on the counter.
• at — She stands at the window.
• to — They walked to the park.
• for — This gift is for you.
• of — A piece of cake.
• with — He cut it with a knife.
• by — She lives by the river.
• from — The letter is from her sister.
• about — We talked about the movie.

Examples in context

Each preposition carries a specific relationship. “In” typically means inside a space (in the box), “on” means on a surface (on the table), and “at” often points to a specific point (at the corner). FirstCry’s guide for kids categorizes these examples by place, time, and movement to help young learners see the pattern.

The implication is that mastering these ten prepositions gives learners a practical toolkit for most daily communication needs.

What are the 20 most common prepositions?

Beyond the core ten, English includes many more frequently-used prepositions. Grammarly’s comprehensive guide lists place prepositions like above, beneath, between, near, and beside alongside the basics.

Top list from Excelsior OWL

Organized by function, these prepositions cover place, time, and direction in most contexts you will encounter.

• Place: in, on, at, under, over, above, below, between, beside, near, behind, in front of, next to
• Time: before, after, during, in, on, at, by, until, for, since
• Direction: to, from, toward, through, across, along, into, onto, out of, off

Frequency ranking

Research from Teachers Pay Teachers identifies 59 prepositions as commonly listed in educational materials. ReadWriteThink’s official checklist includes additional prepositions like aboard, amid, and beneath, giving educators a thorough reference for classroom instruction.

The golden rule of prepositions: they always introduce a phrase that ends with a noun or pronoun. If you find yourself unsure whether a word is a preposition, check whether it needs a noun after it to complete its meaning.

— Grammarly

How do you explain prepositions to kids?

Teaching prepositions to children requires concrete, visual examples rather than abstract definitions. BBC Bitesize recommends starting with location prepositions since kids can physically act them out — a strategy confirmed by Child1st Publications, which found that physical movement helps children internalize spatial relationships.

KS2 English approach from BBC

The BBC’s KS2 English resources frame prepositions as “words that show the relationship between a noun and something else.” For this age group (roughly 7–11 years), the approach uses relatable scenarios: “The dog is under the table” or “The apple is on the plate.” Teachers can reinforce learning with the free pack of 19 preposition posters available through Teachwire, designed specifically for KS2 classrooms.

Simple visuals and stories

Classroom objects make excellent teaching tools. Twinkl USA recommends using everyday items — a book, a box, a desk — to demonstrate prepositions physically. Place the book in the box, then on the box, then under the box, and have children describe each position. This hands-on method works especially well for visual and kinesthetic learners.

These interactive games give children practice using prepositions in physical contexts.

• Musical chairs adapted: Call out prepositions (“Sit behind your chair!”) instead of removing seats (Begin Learning)
• Where’s the Toy: Hide a toy and give clues using prepositions to find it (Lingokids)
• Playground hunt: Send children on a scavenger hunt to find items under benches, beside trees, between rocks (Lucky Little Learners)

How can I identify prepositions in a sentence?

Spotting prepositions becomes easier once you know what to look for. Grammar Monster offers a straightforward test: ask whether a word shows a relationship of place, time, or direction between a noun and something else in the sentence.

Test methods

The simplest identification method involves asking two questions: Does the word come before a noun or pronoun? Does it show where, when, or how something exists? If both answers are yes, you’re likely looking at a preposition. St. Mary’s College’s preposition chart (March 2023) provides a comprehensive checklist including aboard, behind, during, about, and below as additional prepositions beyond the most common twenty.

Sentence breakdown examples

Consider the sentence: “She read the book during the storm.” Here, “during” comes before “the storm” (a noun phrase) and shows when she read — making it a preposition of time. FirstCry’s categorization helps learners distinguish between prepositions of time (“during”), place (“under”), and movement (“through”) by examining the relationship the word creates.

The pattern reveals that asking two simple questions quickly isolates prepositions in any sentence.

Prepositions are linking words. They link one thing to another. The mouse is under the chair. The coin is in the box. The bird is on the branch.

— Grammar Monster

What are the different types of prepositions?

Grammarly categorizes prepositions into three main groups based on the relationships they express. Understanding these categories helps writers choose the right preposition for their intended meaning.

Prepositions of place

These prepositions answer the question “where?” and show spatial relationships between objects.

• in — in the room, in the box
• on — on the table, on the wall
• at — at the corner, at the door
• under — under the bed, under the bridge
• above — above the clouds, above the shelf
• beside — beside the window, beside the chair
• between — between two trees, between the lines
• behind — behind the house, behind the curtain

Prepositions of time

These prepositions answer the question “when?” and specify temporal relationships.

• at — at noon, at 3 PM, at midnight
• on — on Monday, on July 4th, on the weekend
• in — in the morning, in December, in 2025
• before — before noon, before the meeting
• after — after school, after dinner
• during — during the lecture, during summer

Prepositions of direction or movement

These prepositions answer the question “where to?” or “in what direction?” and indicate movement or direction.

• to — to the store, to the park
• into — into the water, into the room
• through — through the tunnel, through the forest
• across — across the street, across the river
• along — along the road, along the path
• toward / towards — toward the exit, towards the goal

Related reading: proper noun · landing page

Prepositional phrases often function as fronted adverbials, vividly setting time, place, or manner at a sentence’s beginning.

Frequently asked questions