Conjunctions are words that connect clauses, sentences, phrases, or individual words. They are the glue that holds English sentences together and are essential for building complex, meaningful communication. There are three main types: coordinating conjunctions, subordinating conjunctions, and correlative conjunctions. Understanding how each type works will help you write more fluent, well-structured English.
How to Form Sentences with Conjunctions
Coordinating Conjunctions (FANBOYS)
Coordinating conjunctions join two equal or independent elements — two words, two phrases, or two independent clauses. The seven coordinating conjunctions are remembered by the acronym FANBOYS.
| Letter | Conjunction | Function | Example |
|---|---|---|---|
| F | for | reason | She stayed home, for she was feeling ill. |
| A | and | addition | I bought apples and oranges. |
| N | nor | negative addition | He doesn't sing, nor does he dance. |
| B | but | contrast | She is small but strong. |
| O | or | alternative | Would you like tea or coffee? |
| Y | yet | contrast/surprise | It was raining, yet they went hiking. |
| S | so | result | I was tired, so I went to bed early. |
Formula: Independent clause + , + FANBOYS + independent clause
Important punctuation rule: When joining two independent clauses with a coordinating conjunction, place a comma before the conjunction.
Subordinating Conjunctions
Subordinating conjunctions join a dependent (subordinate) clause to an independent clause. The dependent clause cannot stand alone as a complete sentence.
| Category | Conjunctions | Example |
|---|---|---|
| Time | after, before, when, while, until, since, as soon as, once | I will call you when I arrive. |
| Reason | because, since, as, now that | She succeeded because she worked hard. |
| Condition | if, unless, provided that, as long as, in case | You can go if you finish your homework. |
| Contrast | although, though, even though, while, whereas | Although it was cold, we went swimming. |
| Purpose | so that, in order that | She studied hard so that she could pass. |
| Result | so...that, such...that | It was so hot that we stayed indoors. |
| Manner | as, as if, as though | He behaves as if he owns the place. |
Formula: Independent clause + subordinating conjunction + dependent clause OR: Subordinating conjunction + dependent clause , + independent clause
Punctuation rule: When the subordinate clause comes first, use a comma. When it comes second, no comma is usually needed.
Correlative Conjunctions
Correlative conjunctions work in pairs to join equal grammatical elements.
| Pair | Example |
|---|---|
| both...and | She speaks both English and French. |
| either...or | You can either call me or send an email. |
| neither...nor | He is neither tall nor short. |
| not only...but also | She is not only intelligent but also kind. |
| whether...or | I don't know whether to laugh or cry. |
Formula: First conjunction + element A + second conjunction + element B
When to Use Each Type
Use Coordinating Conjunctions When:
- Joining two complete, independent ideas of equal importance
- Connecting words or phrases in a list
- Showing simple addition, contrast, cause, or result between equal items
I enjoy reading, and my sister enjoys painting. The restaurant was expensive but worth every penny.
Use Subordinating Conjunctions When:
- One idea depends on or is less important than the other
- Showing time relationships, reasons, conditions, or contrasts between a main idea and a supporting idea
Because the roads were icy, several accidents occurred. I will not leave until you give me an answer.
Use Correlative Conjunctions When:
- Emphasizing the relationship between two parallel elements
- Presenting alternatives, additions, or negations in a balanced structure
Neither the manager nor the employees were aware of the problem. Not only did she apologize, but she also offered to fix the mistake.
Common Mistakes
| Mistake (Wrong) | Correction (Right) | Explanation |
|---|---|---|
| I like tea and but I don't like coffee. | I like tea, but I don't like coffee. | Do not combine two conjunctions. |
| Although she was tired, but she kept working. | Although she was tired, she kept working. | Do not use "but" after "although" — one conjunction is enough. |
| Because of she was late. | Because she was late, she missed the bus. | "Because" introduces a clause, not a complete sentence on its own. |
| Neither the cat or the dog was inside. | Neither the cat nor the dog was inside. | "Neither" pairs with "nor," not "or." |
| He plays both soccer but also tennis. | He plays both soccer and tennis. | "Both" pairs with "and," not "but also." |
| I went to the store, I forgot to buy milk. | I went to the store, but I forgot to buy milk. | Two independent clauses need a conjunction (or a semicolon), not just a comma. |
Practice Examples
- She wanted to go to the party, but she had to study for her exam.
- Although the instructions were clear, several students made errors.
- You should take an umbrella in case it rains later.
- Not only did he finish first, but he also broke the previous record.
- I had breakfast before I left the house this morning.
- Neither the teacher nor the students could solve the puzzle.
- The concert was canceled, so we went to a movie instead.
- She whispered so that no one else could hear her secret.
Quick Reference
- Coordinating conjunctions (FANBOYS): for, and, nor, but, or, yet, so — join equal elements. Use a comma before them when connecting two independent clauses.
- Subordinating conjunctions: because, although, if, when, while, until, etc. — join a dependent clause to an independent clause. Comma goes after the dependent clause when it comes first.
- Correlative conjunctions: both...and, either...or, neither...nor, not only...but also — work in pairs to connect parallel structures.
- Never combine "although/though" with "but" in the same sentence.
- "Neither" always pairs with "nor"; "either" always pairs with "or"; "both" always pairs with "and."
- Avoid comma splices: always use a conjunction (or semicolon) between two independent clauses.
Conjunctions are fundamental building blocks of fluent English. By choosing the right type for each situation, you create sentences that are clear, well-connected, and easy to follow.
