Not unless it is missing the main parts it needs.
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
is a sentence fragment
Make each fragment into a complete sentence.
"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.