Writing: Sentence Errors


If you want to improve your writing, it’s essential to understand how to detect and correct sentence errors. Sentence errors can affect the clarity and impact of your message. This tutorial provides an in-depth look into some of the most common sentence errors, along with tips and examples to help you identify and correct them.

Common Types of Sentence Errors

Sentence errors often occur due to grammatical mistakes, usage of inappropriate words, punctuation errors, or sentence structure issues. Here are some types of errors commonly seen in sentences:

  • Fragments
  • Run-on sentences
  • Comma splices
  • Fused sentences
  • Agreement errors
  • Incorrect word usage


Fragments are incomplete sentences. They may lack a subject, a verb, or an adequate thought. It’s important to ensure that your sentences are complete and make sense on their own.


Error: Running quickly.

Correction: He was running quickly.

Run-on Sentences

Run-on sentences occur when two or more independent clauses are connected improperly. Independent clauses are complete sentences that can stand on their own, and when two or more such are joined without any punctuation, it results in a run-on sentence.


Error: She loves dancing she attends classes every day.

Correction: She loves dancing. She attends classes every day.

Comma Splices

Comma splices happen when two independent clauses are connected by only a comma. This usage is incorrect, and a conjunction, semicolon or period is needed to correct this mistake.


Error: He submitted his assignment, he forgot to write his name.

Correction: He submitted his assignment, but he forgot to write his name.

Fused Sentences

Fused sentences, like run-on sentences, are made up of two independent clauses. The difference is that in fused sentences, the clauses are completely joined without any punctuation. They are fused together.


Error: She wanted to read the book she couldn’t find it.

Correction: She wanted to read the book, but she couldn’t find it.

 Agreement Errors

Agreement errors occur when the subject and verb of a sentence do not agree in number. If the subject is singular, the verb needs to be singular. If the subject is plural, the verb should be plural.


Error: The team of researchers are presenting their findings.

Correction: The team of researchers is presenting their findings.

Incorrect Word Usage

Using the wrong word in a sentence can result in unintended meanings and confusion. Always double-check the word meanings and their context before using them.


Error: She walked though the door.

Correction: She walked through the door.

Strategies to Avoid Sentence Errors

Now that you’re aware of some common sentence errors, let’s discuss a few strategies you can apply to avoid them. These include but are not limited to:

  • Avoiding long, complex sentences
  • Checking for subject-verb agreement
  • Checking for correct word usage
  • Proofreading your work

Avoiding sentence errors might look daunting initially. But as you consistently pay attention to them, they become easier to notice and fix. The best way to improve is to practice writing as much as possible. As you become more comfortable and confident in your writing, you’ll see these errors less frequently over time. Remain patient and persevere in your effort to write grammatically correct sentences.

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