Is it a complete sentence, a fragment, or a run-on?

A complete sentence has:

  • A subject (who or what the sentence is about)
  • A predicate (what the subject does or is)
  • A complete thought

Example:
The dog barked loudly.
→ (Subject: The dog, Predicate: barked loudly)


A fragment is an incomplete sentence because:

  • It is missing a subject, a predicate, or does not express a complete thought.

🚫 Examples:

  • Because the weather was bad. (Not a complete thought)
  • Running through the forest. (No subject)

Fixed:

  • We stayed inside because the weather was bad.
  • She was running through the forest.

A run-on is when two or more complete sentences are joined incorrectly:

  • Without punctuation
  • Without a conjunction

🚫 Example:

  • I love to read I have many books.

Fixed:

  • I love to read. I have many books.
  • I love to read, and I have many books.
  • I love to read; I have many books.

Ask:

  • Does it have a subject?
  • Does it have a verb/predicate?
  • Does it express a complete thought?
  • Are multiple ideas joined properly?

  • Read your sentence aloud – does it sound finished?
  • Use punctuation like periods, commas + conjunctions, or semicolons properly.
  • Avoid starting sentences with because, while, or when unless followed by a full thought.

Classify these:

  1. After the movie ended.Fragment
  2. He played soccer, he also swam.Run-on
  3. The students completed the test.Complete Sentence

Let’s try some problems! ✍️