Compound Sentences: Definition, Examples & How to Write Them

A compound sentence joins two or more independent clauses — each capable of standing alone as a complete sentence — into a single sentence. Compound sentences add rhythm and flow to your writing by connecting related ideas instead of chopping them into short, choppy fragments.

What Is a Compound Sentence?

A compound sentence contains at least two independent clauses connected by a coordinating conjunction (with a comma) or a semicolon. Each independent clause has its own subject and verb and expresses a complete thought.

The FANBOYS Coordinating Conjunctions

There are seven coordinating conjunctions in English, easily remembered with the acronym FANBOYS:

• FFor — explains a reason: She stayed inside, for it was raining.
• AAnd — adds information: He cooked dinner, and she set the table.
• NNor — presents a negative alternative: She didn't call, nor did she text.
• BBut — shows contrast: The test was hard, but she passed.
• OOr — offers a choice: We can leave now, or we can wait.
• YYet — introduces a contrasting idea: He was tired, yet he kept running.
• SSo — indicates a result: It started to rain, so we went inside.

20+ Compound Sentence Examples

• —The alarm went off, and he jumped out of bed.
• —She loves painting, but she rarely has time for it.
• —You can take the bus, or you can walk.
• —He studied all night, so he felt confident about the exam.
• —The movie was long, yet it held my attention.
• —She didn't enjoy the party, nor did she stay long.
• —He brought an umbrella, for the forecast predicted rain.
• —The coffee was cold, but she drank it anyway.
• —I wanted to go hiking, and my friend agreed to join me.
• —The road was blocked, so we took a detour.
• —She finished her novel, and the publisher accepted it immediately.
• —He could barely see the trail, yet he pressed on through the fog.
• —The wind howled outside, but the cabin felt warm and safe.
• —We can order pizza, or we can cook something at home.
• —The deadline was tomorrow, so she stayed up late.
• —He didn't complain, nor did he ask for help.
• —She whispered the secret, and he promised never to tell.
• —The lake was frozen, so they went ice skating.
• —I love summer, but autumn is my favorite season.
• —The music stopped, and the crowd fell silent.
• —He tried to fix the engine, yet it still wouldn't start.

Using Semicolons in Compound Sentences

You can also join independent clauses with a semicolon when the ideas are closely related and no conjunction is needed. This creates a tighter, more sophisticated connection.

• —The house was empty; no one had lived there for years.
• —She smiled at the stranger; he smiled back.
• —The experiment failed; however, the data was still valuable.

Compound vs. Simple vs. Complex Sentences

Punctuation Rules for Compound Sentences

Getting the punctuation right is the most common challenge with compound sentences. Here are the key rules:

1. Always place a comma before the coordinating conjunction when joining two independent clauses. The dog barked, and the cat hissed.
2. Do not use a comma if the conjunction joins two words or phrases (not full clauses). She sang and danced. (No comma needed — "danced" has no subject.)
3. Use a semicolon to join independent clauses without a conjunction. The sun set; the stars appeared.
4. Use a semicolon + conjunctive adverb + comma for transitions like however, therefore, meanwhile. He was exhausted; however, he finished the race.

Common Mistakes to Avoid

Quick Exercises

Combine these simple sentences into compound sentences using an appropriate coordinating conjunction:

1. The phone rang. Nobody answered. → The phone rang, but nobody answered.
2. She finished the book. She started another one. → She finished the book, and she started another one.
3. We can go to the park. We can stay home. → We can go to the park, or we can stay home.
4. He was hungry. He made a sandwich. → He was hungry, so he made a sandwich.

Related Guides

• Complex Sentences: Definition, Examples & How to Use Them →
• Compound-Complex Sentences: Definition & Examples →
• The Ultimate Editing Checklist →
• Revision Strategies for Writers →
• Show Don't Tell: A Practical Guide →