A sentence will have both a subject and a predicate (or one that is understood, for imperatives, e.g. "Stop!" = You must stop! / You should stop!)
A sentence fragment will be missing either a subject or a predicate, or may be a dependent clause without an independent clause.
Sentence: John has a dog that likes to play.
Fragment: Has a dog that likes to play (no subject)
Fragment: A dog that likes to play (no predicate for dog)
Fragment: That likes to play (no independent clause)
Sometimes fragments are acceptable in literary forms, e.g. where used for effect.
"The killer had struck again! In broad daylight. And gotten away."
(the phrase and clause are fragments that should have been part of the sentence)
YES - it doesn't tell you what happens next - eg - I picked a beautiful flower.
Do you work? is a complete sentence; it is not a sentence fragment.
fragment
"She wave." is fragment but "She waves" is a sentence.
Fragment.
sentence fragment
It is a sentence fragment
Make each fragment into a complete sentence.
"After the storm," is not a complete sentence so it is a fragment.
is a sentence fragment
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.
A sentence is a fragment when you do not have a noun/pronoun and a verb.