A sentence fragment is an incomplete sentence presented as if it were complete — given a capital letter at the start and a period (or other terminal punctuation) at the end, but lacking one or more of the elements that make a sentence grammatically complete.

What makes a sentence complete

A grammatically complete sentence requires: a subject (someone or something the sentence is about), a finite verb (a verb that carries tense and agrees with the subject), and a complete thought (the clause is not left dependent on another clause).

A fragment fails at least one of these requirements.

Types of sentence fragments

Missing subject: Analyzed the data thoroughly and produced three charts. — who did this? The subject is absent.

Missing verb: The most significant finding of the study. — there is a noun phrase but no predicate.

Dependent clause fragment: Because the sample size was small. — this is a grammatically dependent clause. It has a subject and a verb, but the subordinating conjunction because makes it depend on a main clause that isn’t there.

Participial phrase fragment: Using the revised protocol and accounting for all confounding variables. — a participial phrase without a main clause or subject.

How to fix fragments

Add the missing element: if the subject is missing, add one. If the verb is missing, add one.

Fragment: The most significant finding of the study.

Fixed: The most significant finding of the study was the unexpected correlation between variables.

Attach the fragment to an adjacent sentence: dependent clause and phrase fragments often belong with the sentence before or after them.

Fragment: The team revised the protocol. Because the first round of data collection had failed.

Fixed: The team revised the protocol because the first round of data collection had failed.

Intentional fragments

Fragments are used deliberately in journalism, advertising, and creative writing for emphasis or rhythm. Remarkable results. Consistently. These are fragments, but they are intentional stylistic choices that work in their context.

In formal academic writing, fragments are generally not appropriate. The challenge is distinguishing accidental fragments (errors) from intentional ones (style choices that require careful judgment about register and context).

Trinka’s grammar checker identifies sentence fragments and dependent clause fragments in academic and professional writing, distinguishing them from intentional stylistic choices in context.

References

Huddleston, R. & Pullum, G. K. (2002). The Cambridge Grammar of the English Language. Cambridge University Press.