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Sentence structure

Grade 5 · English Language Arts · Free lesson

Hi there! I am Studyfin, your friendly learning buddy. Today, we will explore how to build and fix complete sentences!

Every complete sentence needs two main parts to be whole. It needs a subject, which is who or what the sentence is about. It also needs a predicate, which tells what the subject does or is.

A complete sentence must also express a complete thought. If a sentence is missing a subject, a predicate, or a complete thought, we call it a fragment. Let's look at how we can spot and fix these fragments!

The happy dog [Subject] + barked loudly. [Predicate] ✓ Complete Sentence!

Sometimes, we accidentally glue two complete sentences together without the right punctuation. This is called a run-on sentence. We can fix run-on sentences by separating them with a period, or by using a comma and a connecting word like 'and' or 'but'.

I love reading books are great. . Add a period to separate them!
✏️ Worked example

Let's edit this draft sentence to make sure it is correct: "The fluffy kitten slept on the rug it was very warm."

  1. Analyze the draft to see if there are multiple complete thoughts. We find two: 'The fluffy kitten slept on the rug' and 'it was very warm.'
  2. Notice that these two thoughts are pushed together with no punctuation. This is a run-on sentence!
  3. Choose a way to edit and fix the run-on. We can split them into two separate sentences using a period.
  4. Add a period at the end of the first complete thought, and capitalize the first letter of the next sentence.
  5. Read the edited version to check: 'The fluffy kitten slept on the rug. It was very warm.' Now it is perfect!
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