Sentence Errors – Fragments and Run-Ons


Sentence Errors – Fragments and Run-Ons teaches students how to identify complete sentences versus fragments and run-ons. Students will learn what constitutes a complete sentence and how to correct errors to make a sentence complete. The lesson focuses only on sentence fragments and run-ons.

There is one suggestion in the “Options for Lesson” section that you may wish to use during your lesson. At the end of the lesson, you can have students go to the listed website hosted by The “Floyd Danger Adventure: Sentence vs. Fragment” activity will help them learn more about sentence fragments. Or, if you choose to start with this activity, it will introduce the students to this particular sentence error.

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What our Sentence Errors – Fragments and Run-Ons lesson plan includes

Lesson Objectives and Overview: Sentence Errors – Fragments and Run-Ons teaches students how to identify complete sentences. The lesson describes what a sentence must contain to be complete. Students will then learn about two specific sentence errors: fragments and run-ons. By the end of the lesson, they will be able to find and correct run-on and fragmented sentences.

Two content pages detail what a complete sentence is and the two errors that this lesson focuses on. Students will learn that complete sentences begin with a capital letter, end with punctuation, and contain a subject and verb or predicate. Students may not know what a predicate is, but the lesson defines predicate as well.

The lesson then describes sentence fragments. It reminds students that not all short sentences are fragments. Fragments simply do not contain either a subject or verb, or both. Even the sentence “Go!” is a complete because of the implied you subject. The lesson then reminds students that not all long sentences are run-ons. Run-ons simply include many subjects and verbs and not enough punctuation. Students will also learn how to correct both sentence fragments and run-ons.


For the activity, students will read 16 sentences. They will have to decide whether each one is a fragment (F) or a run-on (R). They will then need to rewrite the sentences correctly on a separate sheet of paper.


The practice worksheet requires students to fix run-on sentences. To do so, they will either add a comma or conjunction or separate the content into two or more sentences. There is a total of eight statements to correct. There is extra space at the bottom of the page if they need more room to rewrite certain sentences.


Similar to the practice worksheet, the homework assignment requires students to fix sentences, this time fragments. There is a total of 12 sentence fragments. Students must rewrite the sentences after figuring out which part of the sentence is missing: subject or predicate.

Additional information


4th Grade, 5th Grade


Language Arts

State Educational Standards


Lessons are aligned to meet the education objectives and goals of most states. For more information on your state objectives, contact your local Board of Education or Department of Education in your state