Explain the difference between a sentence and a sentence fragment in your own words.

A sentence expresses a complete thought and has a subject and a verb, while a fragment is missing one or both and doesn't express a complete thought.

Rewrite the following sentence fragment to make it a complete sentence: 'Running quickly down the street.'

The dog was running quickly down the street.

I can distinguish between complete sentences and sentence fragments.

1
A complete sentence is a group of words that contains a subject and a verb and expresses a complete thought.
2
A sentence fragment is a group of words that is missing a subject, a verb, or both, and does not express a complete thought.
3
A complete sentence begins with a capital letter and ends with a period, question mark, or exclamation point.