Have you ever been writing an essay, reached the end of a thought, and just tossed a comma in before starting the next sentence? It feels natural, right? You want to keep the flow going, so you use a comma to glue your ideas together.
Unfortunately, this creates one of the most common punctuation mistakes in English writing: the comma splice.
Don’t worry if you’ve never heard this term before. Today, we are going to learn exactly what a comma splice is and three simple ways to fix it!
What is a Comma Splice?
A comma splice happens when you join two complete sentences using only a comma.
In grammar, a complete sentence is a complete thought—it has a subject and a verb and can stand alone. A comma is a wonderful punctuation mark, but it is only meant for a short pause. It is simply not strong enough to hold two full sentences together on its own.
Think of a comma like a piece of tape. It is great for wrapping a small present, but you can’t use it to hold two heavy boxes together. For that, you need something stronger!
See it in Action: The Mistake
Let’s look at a classic example of a comma splice:
Incorrect: I stayed up late studying last night, I feel very tired today.
Why is this wrong? Look at the text before and after the comma:
- I stayed up late studying last night. (Complete sentence)
- I feel very tired today. (Complete sentence)
Because both sides are independent, full sentences, using just a comma between them is a comma splice.
3 Easy Ways to Fix a Comma Splice
The good news is that comma splices are incredibly easy to fix. Depending on your writing style, you can choose one of these three options:
1. Separate them with a Period
The simplest fix is to break the long sentence into two shorter, cleaner sentences.
- Correct: I stayed up late studying last night. I feel very tired today.
2. Add a Connecting Word (Conjunction)
If you want to keep the ideas in one sentence, you can keep the comma, but you must add a connecting word right after it. A great trick to remember these words is the acronym FANBOYS (For, And, Nor, But, Or, Yet, So).
- Correct: I stayed up late studying last night, so I feel very tired today.
- Correct: I stayed up late studying last night, and I feel very tired today.
3. Upgrade to a Semicolon
If the two sentences are very closely related, you can trade the weak comma for a strong semicolon (;). A semicolon is perfectly built to connect two complete thoughts.
- Correct: I stayed up late studying last night; I feel very tired today.
Quick Reference Summary
Here is a quick look at how to handle your sentences:
| Punctuation Style | Is it correct? | Example |
| Sentence , Sentence | ❌ No (Comma Splice) | Learning English is fun, it takes time. |
| Sentence . Sentence | Yes | Learning English is fun**.** It takes time. |
| Sentence , connecting word Sentence | Yes | Learning English is fun**, but** it takes time. |
| Sentence ; Sentence | Yes | Learning English is fun**;** it takes time. |
Your Next Step
When you proofread your next writing piece, look specifically at your commas. Ask yourself: “Can the words before this comma and the words after this comma stand alone as independent sentences?” If the answer is yes, you’ve caught a comma splice! Grab your period, your semicolon, or a connecting word, and fix it like a pro.