Almost always sentence fragments are caused by the writer using a period in a sentence where all that was really needed was a comma.
Example fragment: He always felt at home in the city. Having spent so much of his childhood there. ("Having spent so much of his childhood there." is the "fragment," because it has been "broken off of" the sentence it belongs to.)
The sentence should have been, "He always felt at home in the city, having spent so much of his childhood there."
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.
sentences
You should not capitalize a sentence fragment following a colon.
Yes, if it doesn't have a predicate, it doesn't qualify as a sentence, only a fragment.
A sentence fragment is an incomplete sentence. The mistake that causes sentence fragments is failure to be fully aware of what you are saying (or writing). I often see sentence fragments on this site. Some people post questions that look like this: Why do horses? How did it? Do they really? And so forth.
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.