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.
an intentional fragment is a form of writing where you use one word as a sentence. this creates "drama" and makes the word stand out.
I have a fragment of glass in my hand. As political agreement could not be achieved, society began to fragment.
No, the sentence "all you could do was keep writing" is a complete sentence because it has a subject ("you") and a verb phrase ("could do was keep writing"). It expresses a complete thought on its own.
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
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.
Make each fragment into a complete sentence.
"After the storm," is not a complete sentence so it is a fragment.