What Are Conjunctions?
Conjunctions are small but powerful words that connect other words, phrases, or clauses within a sentence. Without conjunctions, English would consist of nothing but short, choppy sentences that fail to express complex ideas. Words like and, but, or, so, because, although, and when are all conjunctions, and they appear in virtually every paragraph of written or spoken English.
There are three main types of conjunctions in English: coordinating conjunctions, subordinating conjunctions, and correlative conjunctions. Each type serves a different purpose and follows its own grammatical rules. Coordinating conjunctions join elements of equal grammatical importance. Subordinating conjunctions create a relationship between a main clause and a dependent clause. Correlative conjunctions work in pairs to connect balanced elements.
Mastering conjunctions is essential for every level of English proficiency, from basic sentence building to advanced academic writing. They determine how ideas flow, how arguments are structured, and how meaning is communicated. A student who uses conjunctions accurately and naturally will produce writing that is not only grammatically correct but also clear, sophisticated, and easy to follow.
Conjunctions do not just connect words — they show the relationship between ideas. And adds information, but shows contrast, or offers alternatives, so shows result, because explains reasons, and although introduces unexpected information. Choosing the right conjunction changes the entire meaning of a sentence.
When Do We Use Conjunctions?
We use conjunctions whenever we need to connect ideas within a sentence or between sentences. The type of conjunction we choose depends on the relationship between the ideas we want to express. Here is an overview of the main conjunction types and their functions:
| Type | Function | Examples |
|---|---|---|
| Coordinating | Join words, phrases, or independent clauses of equal importance | and, but, or, nor, for, yet, so |
| Subordinating | Connect a dependent clause to an independent clause | because, although, when, while, if, since, until, after, before, unless |
| Correlative | Work in pairs to join balanced elements | both...and, either...or, neither...nor, not only...but also, whether...or |
| Relationship | Conjunction | Example |
|---|---|---|
| Addition | and | She plays the guitar and sings beautifully. |
| Contrast | but, yet, although | He studied hard, but he failed the exam. |
| Choice / Alternative | or, either...or | Would you like tea or coffee? |
| Cause / Reason | because, since, for | We stayed inside because it was raining. |
| Result / Effect | so | It was cold, so I wore a jacket. |
| Time | when, while, before, after, until | When the bell rang, everyone stood up. |
| Condition | if, unless | If you study regularly, you will improve. |
| Concession | although, even though | Although he was tired, he finished the project. |
The seven coordinating conjunctions can be remembered with the acronym FANBOYS: For, And, Nor, But, Or, Yet, So. This is one of the most useful memory tools in English grammar, and it appears regularly in exams.
Coordinating Conjunctions — FANBOYS
Coordinating conjunctions join two or more elements of equal grammatical rank: word + word, phrase + phrase, or independent clause + independent clause. There are exactly seven coordinating conjunctions in English, and each one expresses a different logical relationship.
Independent Clause + , + FANBOYS + Independent Clause
When a coordinating conjunction joins two independent clauses (each with its own subject and verb), a comma is placed before the conjunction.
Word/Phrase + FANBOYS + Word/Phrase
When a coordinating conjunction joins words or phrases (not full clauses), no comma is needed.
| Conjunction | Meaning | Joining Clauses | Joining Words/Phrases |
|---|---|---|---|
| For | Because / Since (formal, literary) | She stayed home, for she was feeling unwell. | — (rarely joins words) |
| And | Addition, continuation | I finished my homework, and I went to bed. | bread and butter |
| Nor | Negative addition (not this either) | He does not eat meat, nor does he drink milk. | neither rain nor snow |
| But | Contrast, contradiction | The movie was long, but it was very entertaining. | cheap but effective |
| Or | Choice, alternative | We can eat here, or we can order takeaway. | red or blue |
| Yet | Contrast (stronger than but, = nevertheless) | She is very young, yet she speaks with great confidence. | simple yet elegant |
| So | Result, consequence | It was raining heavily, so we cancelled the picnic. | — (rarely joins words) |
Students frequently forget the comma before coordinating conjunctions when joining two independent clauses. This creates a comma splice error or a run-on sentence.
✘ She was hungry so she ordered pizza. (missing comma)
✔ She was hungry, so she ordered pizza.
However, do not use a comma when the conjunction joins only words or phrases:
✘ I like apples, and bananas. (unnecessary comma)
✔ I like apples and bananas.
Subordinating Conjunctions
Subordinating conjunctions connect a dependent (subordinate) clause to an independent (main) clause. The dependent clause cannot stand alone as a complete sentence — it needs the main clause to make sense. Subordinating conjunctions are essential for creating complex sentences and expressing relationships of time, cause, condition, contrast, and purpose.
Subordinating Conjunction + Dependent Clause , + Main Clause
When the dependent clause comes first, use a comma after it.
Main Clause + Subordinating Conjunction + Dependent Clause
When the main clause comes first, no comma is usually needed.
| Category | Conjunctions | Example (Conjunction First) | Example (Conjunction Middle) |
|---|---|---|---|
| Time | when, while, before, after, until, since, as soon as, once | Before you leave, close all the windows. | Close all the windows before you leave. |
| Cause / Reason | because, since, as | Because the traffic was terrible, we arrived late. | We arrived late because the traffic was terrible. |
| Condition | if, unless, provided that, as long as, in case | If you need help, do not hesitate to ask. | Do not hesitate to ask if you need help. |
| Contrast / Concession | although, even though, though, whereas, while | Although she was nervous, she gave an excellent speech. | She gave an excellent speech although she was nervous. |
| Purpose | so that, in order that | So that everyone could hear, he used a microphone. | He used a microphone so that everyone could hear. |
| Comparison | as, than, as...as | — | She works harder than anyone else on the team. |
| Place | where, wherever | Wherever you go, I will follow. | I will follow wherever you go. |
A very common error is using because and so in the same sentence. They express the same cause-effect relationship from different directions.
✘ Because it was raining, so we stayed inside.
✔ Because it was raining, we stayed inside.
✔ It was raining, so we stayed inside.
Choose one or the other — never both in the same sentence.
Similarly, do not combine although with but. They both express contrast.
✘ Although he was tired, but he continued working.
✔ Although he was tired, he continued working.
✔ He was tired, but he continued working.
Correlative Conjunctions
Correlative conjunctions always come in pairs. They work together to join words, phrases, or clauses that are grammatically equal. The elements connected by correlative conjunctions must be parallel in structure — this means they should have the same grammatical form (noun + noun, verb + verb, clause + clause).
both...and | either...or | neither...nor | not only...but also | whether...or
| Pair | Meaning | Example 1 | Example 2 |
|---|---|---|---|
| both...and | Two things are true together | She is both intelligent and hardworking. | Both the students and the teachers enjoyed the event. |
| either...or | One or the other (choice) | You can either call me or send an email. | Either we leave now, or we will miss the train. |
| neither...nor | Not this and not that (double negative) | He speaks neither French nor German. | Neither the manager nor the staff were informed. |
| not only...but also | Both, with emphasis on the second | She is not only a great singer but also a talented dancer. | He not only passed the exam but also got the highest score. |
| whether...or | It does not matter which option | Whether you agree or not, the decision has been made. | I cannot decide whether to stay or leave. |
The elements joined by correlative conjunctions must be grammatically parallel. If one side is a noun, the other must be a noun. If one side is a verb phrase, the other must be a verb phrase.
✘ She not only likes reading but also to swim. (gerund + infinitive = not parallel)
✔ She not only likes reading but also likes swimming. (gerund + gerund = parallel)
✔ She likes not only reading but also swimming. (gerund + gerund = parallel)
When either...or or neither...nor connects two subjects, the verb agrees with the nearer subject (the one closest to the verb).
Either the teacher or the students are responsible. (students = plural, nearer)
Neither the students nor the teacher is responsible. (teacher = singular, nearer)
Special Rules and Important Details
Conjunctions follow specific punctuation and grammar rules that are frequently tested in exams. Understanding these details will help you avoid the most common mistakes and write more accurately.
| Rule | Explanation | Example |
|---|---|---|
| Oxford Comma | In a list of three or more items, a comma before the final and/or is optional (but recommended for clarity) | I bought apples, oranges, and bananas. |
| Starting a Sentence with And/But | Traditionally avoided in formal writing, but acceptable in modern English for emphasis | But the real question is: does it matter? |
| Nor + Inversion | After nor, the word order is inverted (auxiliary + subject) | She does not like coffee, nor does she like tea. |
| For = Because | For as a conjunction means "because" but is very formal and literary; rarely used in conversation | He did not attend, for he was feeling ill. |
| Yet vs. But | Yet is stronger than but and often implies surprise; more formal | The task was difficult, yet everyone completed it on time. |
| So That vs. So | So that = purpose ("in order that"); So = result ("therefore") | I left early so that I could catch the bus. (purpose) I was tired, so I went to bed. (result) |
| While vs. Whereas | Both show contrast, but whereas is more formal; while can also mean "during the time that" | Tom likes jazz, whereas his brother prefers rock. |
| Unless = If...not | Unless introduces a negative condition; do not use not in the unless clause | Unless you hurry, you will miss the bus. (= If you do not hurry, you will miss the bus.) |
1. Although / Even though vs. Despite / In spite of
Although / Even though + clause (subject + verb): Although it rained, we went out.
Despite / In spite of + noun / gerund: Despite the rain, we went out.
✘ Although the rain, we went out.
✘ Despite it rained, we went out.
2. Because vs. Because of
Because + clause: Because it was cold, I wore a coat.
Because of + noun / gerund: Because of the cold weather, I wore a coat.
✘ Because of it was cold, I wore a coat.
Many exam questions test whether you know the difference between a conjunction (followed by a clause) and a preposition (followed by a noun or gerund). Learn these pairs:
because (conjunction) ↔ because of (preposition)
although / even though (conjunction) ↔ despite / in spite of (preposition)
while / when (conjunction) ↔ during (preposition)
“A conjunction is a bridge between two islands of thought — choose the right bridge, and your reader will cross with ease.”
— The Grammar GazetteExamples in Context
Study these example sentences carefully. Each group demonstrates a different aspect of conjunctions in real English sentences.
Conjunctions Grouped by Function
One of the most effective ways to master conjunctions is to learn them by function rather than by type. This section organizes the most important conjunctions by the logical relationship they express, making it easier to choose the right one when writing or speaking.
| Function | Conjunctions | Example Sentence |
|---|---|---|
| Addition (adding information) |
and, both...and, not only...but also, as well as | He plays the guitar as well as the piano. |
| Contrast (showing difference) |
but, yet, although, even though, though, whereas, while | She loves the city, whereas her husband prefers the countryside. |
| Cause & Reason (explaining why) |
because, since, as, for | Since you are already here, you might as well stay for dinner. |
| Result & Effect (showing outcome) |
so, so...that, such...that | The film was so boring that half the audience left early. |
| Choice (offering alternatives) |
or, either...or, neither...nor, whether...or | Neither the manager nor the assistant was available. |
| Time (indicating when) |
when, while, before, after, until, since, as soon as, once, as | As soon as the meeting ended, everyone rushed to the cafeteria. |
| Condition (setting requirements) |
if, unless, provided that, as long as, in case, even if | You may borrow my car as long as you drive carefully. |
| Purpose (explaining goal) |
so that, in order that | She woke up early so that she would not miss the flight. |
Both express result, but the structure is different:
so + adjective/adverb + that: The test was so difficult that nobody passed.
such + (a/an) + noun + that: It was such a difficult test that nobody passed.
Remember: so goes with adjectives/adverbs; such goes with nouns (often with an adjective before them).
All three can mean "because," but they differ in formality and emphasis:
Because — the strongest and most common; directly states the reason (any register)
Since — slightly softer; the reason is often already known (semi-formal)
As — the weakest; used when the reason is obvious or secondary (formal)
In exams, because is almost always the safest choice for expressing cause.
Common Mistakes and How to Avoid Them
Conjunctions are responsible for some of the most frequent grammar errors in student writing. This section identifies the mistakes that appear most often in exams and provides clear corrections.
| Error Type | Incorrect | Correct |
|---|---|---|
| Double conjunction (because + so) |
Because she was sick, so she stayed home. | Because she was sick, she stayed home. She was sick, so she stayed home. |
| Double conjunction (although + but) |
Although it was expensive, but I bought it. | Although it was expensive, I bought it. It was expensive, but I bought it. |
| Conjunction + preposition confusion (because vs. because of) |
Because of she was late, she missed the bus. | Because she was late, she missed the bus. Because of her lateness, she missed the bus. |
| Conjunction + preposition confusion (although vs. despite) |
Despite he worked hard, he did not succeed. | Although he worked hard, he did not succeed. Despite working hard, he did not succeed. |
| Unless + negative verb | Unless you don't study, you will fail. | Unless you study, you will fail. |
| Faulty parallelism | She likes both dancing and to sing. | She likes both dancing and singing. |
| Missing comma with subordinator first | When I arrived the shop was closed. | When I arrived, the shop was closed. |
| Run-on sentence (missing comma + conjunction) |
It was late she decided to walk home. | It was late, so she decided to walk home. |
Conjunctions vs. Linking Words (Adverbial Connectors)
Students often confuse conjunctions with linking words (also called adverbial connectors or transition words). While both connect ideas, they follow different grammatical rules, especially regarding punctuation. Understanding this distinction is critical for exam success and academic writing.
| Feature | Conjunctions | Linking Words (Connectors) |
|---|---|---|
| What they are | Grammatical words that join clauses | Adverbs that show the relationship between sentences |
| Position | Between the clauses they connect | Usually at the beginning of a new sentence or after a semicolon |
| Punctuation | Comma before (if joining clauses) or none | Period or semicolon before; comma after |
| Examples (Contrast) | but, although, yet | however, nevertheless, on the other hand |
| Examples (Result) | so, so that | therefore, consequently, as a result |
| Examples (Addition) | and, both...and | moreover, furthermore, in addition |
| Examples (Cause) | because, since, as | for this reason, due to this |
Key Punctuation Difference:
One of the most common errors in student writing is treating however as a conjunction. However is NOT a conjunction — it is an adverbial connector. You cannot use just a comma before it to join two clauses. You must use a period or a semicolon.
✘ It was expensive, however, I bought it.
✔ It was expensive. However, I bought it.
✔ It was expensive; however, I bought it.
✔ It was expensive, but I bought it. (using the conjunction but instead)
| Conjunction | Equivalent Linking Word | Conjunction Example | Linking Word Example |
|---|---|---|---|
| but | however, nevertheless | It rained, but we went out. | It rained. However, we went out. |
| so | therefore, consequently | He was late, so he missed the flight. | He was late. Therefore, he missed the flight. |
| and | moreover, furthermore | She is smart, and she works hard. | She is smart. Moreover, she works hard. |
| because | for this reason, as a result | I left early because I was tired. | I was tired. For this reason, I left early. |
| although | nevertheless, even so | Although he tried, he failed. | He tried. Nevertheless, he failed. |
If the question asks you to join two sentences with one word and no extra punctuation change, the answer is almost always a conjunction (but, because, although, so, etc.).
If the question allows you to use a period or semicolon, you may also consider linking words (however, therefore, moreover, etc.).
Always check whether the blank is between two clauses (conjunction territory) or at the start of a new sentence (linking word territory).