What is a Run-on Sentence?
A run-on sentence is a type of grammatical error where two or more independent clauses are joined together without proper punctuation, resulting in a sentence that lacks clarity and coherence. Independent clauses are complete sentences that contain a subject and a verb, and when joined together without correct punctuation, they can create a sentence that is difficult to follow.
Types of Run-on Sentences
There are two main types of run-on sentences: fused sentences and comma splices. A fused sentence occurs when two independent clauses are joined together without any punctuation, while a comma splice occurs when a comma is used to join two independent clauses without a conjunction. For example:
- Fused sentence: I went to the store, I bought milk.
- Comma splice: I went to the store, my friend was already there.
Why Are Run-on Sentences a Problem?
Run-on sentences can make it difficult for readers to understand the writer's intended meaning. When multiple independent clauses are joined together without proper punctuation, it can create a sense of confusion and make the sentence hard to follow. This can be particularly problematic in academic or professional writing, where clarity and precision are crucial. Additionally, run-on sentences can also undermine the writer's credibility, as they may be seen as careless or unprofessional.

Examples of Run-on Sentences
Here are a few examples of run-on sentences:
- I went to the store I bought milk I also picked up eggs.
- The new employee was nervous he stumbled over his words he apologized repeatedly.
- The company is expanding it will hire new employees it will also invest in new equipment.
How to Fix Run-on Sentences
There are several ways to fix run-on sentences, including:
- Using a semicolon to separate the two independent clauses.
- Using a period to separate the two independent clauses.
- Using a conjunction (such as and, but, or, nor) to join the two independent clauses.
- Rephrasing the sentence to make it clear and concise.
For example:

- Original sentence: I went to the store, I bought milk, I also picked up eggs.
- Fixed sentence: I went to the store and bought milk and also picked up eggs.
- Alternative sentence: I went to the store and picked up milk and eggs.
Preventing Run-on Sentences
Preventing run-on sentences is easier than fixing them. To avoid run-on sentences, it's essential to identify and separate independent clauses and use proper punctuation. Here are a few tips:
- Use a comma to separate items in a list.
- Use a semicolon to separate two independent clauses that are closely related.
- Use a conjunction to join two independent clauses.
- Use a period to separate two independent clauses.
By following these tips and being mindful of punctuation, you can avoid run-on sentences and ensure your writing is clear, concise, and effective.