Get is just a word; it's a verb.
All it needs to be a sentence is a subject, or in the case of this word, you will also need an object.
We get.
It's a sentence because it has the required subject and verb but doesn't convey much meaning.
We get cable. or even: We get it.
As an exclamation, the word alone can be a sentence, "Get!"; the inferred subject is 'you'.
Do you work? is a complete sentence; it is not a sentence fragment.
"She wave." is fragment but "She waves" is a sentence.
fragment
Fragment.
sentence fragment
It is a sentence fragment
Make each fragment into a complete sentence.
is a sentence fragment
"After the storm," is not a complete sentence so it is a fragment.
A sentence is a fragment when you do not have a noun/pronoun and a verb.
A fragment sentence is a partial sentence. It does not have everything it needs to be a full sentence. For example: "The dog" is a fragment.
In order to not write a sentence fragment, you must always have a subject in your sentence and a predicate. For example: Fragment: Went to the movies. Sentence: I went to the movies.