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Preposition vs. Conjunction — What's the Difference?

By Urooj Arif & Fiza Rafique — Updated on May 10, 2024
Prepositions link nouns, pronouns, or phrases to other words in a sentence, denoting relationships like location or time, while conjunctions connect clauses or sentences, indicating relationships like choice or causality.
Preposition vs. Conjunction — What's the Difference?

Difference Between Preposition and Conjunction

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Key Differences

Prepositions are used to express relationships of place, time, or direction within a sentence, such as "in," "at," or "by." Whereas, conjunctions serve to connect words, phrases, or entire clauses together, using words like "and," "but," or "because."
A preposition typically precedes a noun or pronoun to form a prepositional phrase, which functions as an adjective or adverb. On the other hand, a conjunction sits between the elements it connects, coordinating or subordinating them depending on its type.
The role of prepositions is largely static, focusing on spatial, temporal, or logical relationships. In contrast, conjunctions are dynamic, creating complex sentence structures and linking thoughts and ideas.
Understanding prepositions involves recognizing their fixed relationships with other words in a sentence. Conversely, conjunctions require an understanding of the logic or sequence between the clauses they join.
Prepositions do not alter the basic structure of a sentence but add detail. Conjunctions, however, can significantly change the flow and meaning of sentences by the way they connect parts.
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Comparison Chart

Basic Function

Links nouns to other words
Connects clauses or sentences

Examples

In, at, on, by, under
And, but, because, although, or

Position in Sentence

Before noun/pronoun
Between clauses or words

Impact on Sentence Meaning

Adds detail about time, place, manner
Affects logic and relationship

Types

Simple, compound, participle
Coordinating, subordinating, correlative

Compare with Definitions

Preposition

A word used to show the relationship of a noun or pronoun to another word.
The book is on the table.

Conjunction

Shows causality or reason.
He was late because traffic was bad.

Preposition

Functions as a bridge in a sentence.
They sat by the fire.

Conjunction

A word that connects phrases, words, or clauses.
She bought apples and oranges.

Preposition

Often used to indicate direction.
He walked towards the park.

Conjunction

Introduces an alternative or choice.
You can either stay or leave.

Preposition

Can show possession.
This is a friend of mine.

Conjunction

Helps in building complex sentences.
Although it was raining, they went hiking.

Preposition

Expresses temporal, spatial, or logical relationship.
She arrived after midnight.

Conjunction

Can contrast or compare.
She likes tea, but he prefers coffee.

Preposition

A word governing, and usually preceding, a noun or pronoun and expressing a relation to another word or element in the clause, as in ‘the man on the platform’, ‘she arrived after dinner’, ‘what did you do it for?’.

Conjunction

The act of joining.

Preposition

A word or phrase placed typically before a substantive and indicating the relation of that substantive to a verb, an adjective, or another substantive, as English at, by, with, from, and in regard to.

Conjunction

The state of being joined.

Preposition

To position or place in position in advance
Artillery that was prepositioned at strategic points in the desert.

Conjunction

A joint or simultaneous occurrence; concurrence
The conjunction of historical and economic forces that created a depression.

Preposition

Any of a class of non-inflecting words typically employed to connect a following noun or a pronoun, in an adjectival or adverbial sense, with some other word: a particle used with a noun or pronoun (in English always in the objective case) to make a phrase limiting some other word.

Conjunction

One resulting from or embodying a union; a combination
"He is, in fact, a remarkable conjunction of talents" (Jerry Adler).

Preposition

An adposition.

Conjunction

The part of speech that serves to connect words, phrases, clauses, or sentences.

Preposition

(obsolete) A proposition; an exposition; a discourse.

Conjunction

Any of the words belonging to this part of speech, such as and, but, as, and because.

Preposition

To place in a location before some other event occurs.
It is important to preposition the material before turning on the machine.

Conjunction

(Astronomy) The position of two celestial objects when they have the same celestial longitude. As viewed from Earth, two objects in conjunction will appear to be close to each other in the sky.

Preposition

A word employed to connect a noun or a pronoun, in an adjectival or adverbial sense, with some other word; a particle used with a noun or pronoun (in English always in the objective case) to make a phrase limiting some other word; - so called because usually placed before the word with which it is phrased; as, a bridge of iron; he comes from town; it is good for food; he escaped by running.

Conjunction

A compound proposition that has components joined by the word and or its symbol and is true only if both or all the components are true.

Preposition

A proposition; an exposition; a discourse.
He made a long preposition and oration.

Conjunction

The relationship between the components of a conjunction.

Preposition

A function word that combines with a noun or pronoun or noun phrase to form a prepositional phrase that can have an adverbial or adjectival relation to some other word

Conjunction

The act of joining, or condition of being joined.

Preposition

(linguistics) the placing of one linguistic element before another (as placing a modifier before the word it modifies in a sentence or placing an affix before the base to which it is attached)

Conjunction

(grammar) A word used to join other words or phrases together into sentences. The specific conjunction used shows how the two joined parts are related.

Conjunction

Cooccurrence; coincidence.

Conjunction

(astronomy) The alignment of two bodies in the solar system such that they have the same longitude when seen from Earth.

Conjunction

(astrology) An aspect in which planets are in close proximity to one another.

Conjunction

(logic) The proposition resulting from the combination of two or more propositions using the ∧ (\and) operator.

Conjunction

A place where multiple things meet

Conjunction

The act of conjoining, or the state of being conjoined, united, or associated; union; association; league.
He will unite the white rose and the red:Smille heaven upon his fair conjunction.
Man can effect no great matter by his personal strength but as he acts in society and conjunction with others.

Conjunction

A connective or connecting word; an indeclinable word which serves to join together sentences, clauses of a sentence, or words; as, and, but, if.
Though all conjunctions conjoin sentences, yet, with respect to the sense, some are conjunctive and some disjunctive.

Conjunction

The temporal property of two things happening at the same time;
The interval determining the coincidence gate is adjustable

Conjunction

The state of being joined together

Conjunction

An uninflected function word that serves to conjoin words or phrases or clauses or sentences

Conjunction

The grammatical relation between linguistic units (words or phrases or clauses) that are connected by a conjunction

Conjunction

(astronomy) apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac

Conjunction

Something that joins or connects

Common Curiosities

How do prepositions affect sentence structure?

Prepositions typically do not alter the sentence structure but provide clarifying details.

What are examples of prepositions?

Examples include "in," "at," "by," and "with."

What are examples of conjunctions?

Examples include "and," "but," "or," and "because."

What is a preposition?

A preposition is a part of speech that indicates the relationship of a noun or pronoun to other parts of the sentence.

What is a conjunction?

A conjunction is a word that connects clauses or sentences or coordinates words in the same clause.

What are compound prepositions?

Compound prepositions consist of more than one word, such as "according to."

Do prepositions have objects?

Yes, prepositions typically require an object to complete their phrase.

Why is the correct use of prepositions important?

Correct use of prepositions is crucial for clear communication and precise meaning.

Can a word be both a preposition and a conjunction?

Yes, some words can function both ways, depending on usage.

How do conjunctions affect sentence structure?

Conjunctions can significantly alter the structure by connecting different clauses.

Can prepositions end sentences?

In spoken English, prepositions often end sentences.

Do conjunctions have objects?

No, conjunctions do not have objects but connect sentence elements.

What are correlative conjunctions?

These are pairs like "either...or" and "neither...nor" that work together in a sentence.

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Author Spotlight

Written by
Urooj Arif
Urooj is a skilled content writer at Ask Difference, known for her exceptional ability to simplify complex topics into engaging and informative content. With a passion for research and a flair for clear, concise writing, she consistently delivers articles that resonate with our diverse audience.
Co-written by
Fiza Rafique
Fiza Rafique is a skilled content writer at AskDifference.com, where she meticulously refines and enhances written pieces. Drawing from her vast editorial expertise, Fiza ensures clarity, accuracy, and precision in every article. Passionate about language, she continually seeks to elevate the quality of content for readers worldwide.

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