English Parts of Speech: Prepositions, Conjunctions, and Interjections

Series index: English Parts of Speech Overview



After reading Wikipedia’s entry on Adposition, I wondered why traditional grammar only mentions prepositions. What about postpositions? Ambipositions? Circumpositions? Anyway, prepositions link a noun phrase to another part of the sentence in order to express the relationship between the two. (Is the book on the table, under the table, or next to the table?) Here are some useful preposition links:


When I think of conjunctions, I think of Schoolhouse Rock: “Conjunction junction, what’s your function? Hooking up words and phrases and clauses.” Here are the three types of conjunctions:

Note: some words can function as both conjunctions and prepositions, like before, after, and until. See Prepositions Vs. Subordinating Conjunctions.


Interjections are words used for the sole purpose of expressing emotion. They’re either used as complete sentences, often with an exclamation mark (Wow! Oh! Good grief!), or within a sentence, offset by a comma (Well, I hope so. Oh, thank you!).