Definition · Plain-language
Sentence fragment
A sentence fragment is a group of words that looks like a sentence but is missing a subject, a main verb, or an independent clause, leaving the thought incomplete.
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What a complete sentence requires
A complete sentence must have three things: a subject (who or what performs the action), a predicate with a main verb (what the subject does, is or has), and the ability to stand alone as an independent clause — a complete thought. Remove any one of these elements and you have a fragment. A fragment may look like a sentence because it starts with a capital letter and ends with a full stop, but grammatically it is incomplete. Fragments are among the most common errors in student writing, often occurring when a writer adds a phrase or clause as an afterthought and punctuates it separately rather than attaching it to the sentence it belongs to.
Types of fragments and examples
Fragments fall into three main categories. Missing-subject fragments omit who is acting: "Submitted the report on Friday." (Who submitted?) Fix: add a subject — "She submitted the report on Friday." Missing-verb fragments omit the action: "The new research team in the second building." (What did they do?) Fix: add a verb — "The new research team met in the second building." Dependent-clause fragments are subordinate clauses punctuated as complete sentences: "Because the deadline moved." (What happened because of this?) Fix: attach to a main clause — "Because the deadline moved, we revised the plan." Verbal phrase fragments (beginning with an -ing, infinitive or past participle) also appear: "Running the analysis." Fix: "She was running the analysis."
Intentional vs accidental fragments
Not all fragments are errors. Skilled writers use intentional fragments for stylistic effect: short emphatic statements ("Absolutely."), exclamations ("What a result!"), questions ("The question is: what next?"), and topic sentences in informal pieces. Context signals whether a fragment is deliberate. In formal academic and professional writing, however, fragments almost always represent errors and undermine the writer's credibility. Copy-editing and proofreading should identify fragments by asking of each sentence: does it have a subject? Does it have a main verb? Can it stand alone? A yes to all three confirms a complete sentence; a no to any one flags a fragment that needs correction or intentional justification.
Key facts
At a glance
- Definition: a group of words punctuated as a sentence but missing a subject, main verb, or independent clause
- Three requirements for a complete sentence: subject + main verb + ability to stand alone
- Fragment type 1: missing subject — "Analysed the results."
- Fragment type 2: missing verb — "The team in the corridor."
- Fragment type 3: dependent clause alone — "Because the sample was small."
- Fragment type 4: verbal phrase — "Running the experiment."
- Fix options: attach to adjacent sentence, or add the missing element
- Intentional fragments: acceptable in informal or creative writing for stylistic effect
Common misconceptions
What people often get wrong
Often heard: Any short sentence is a fragment.
Actually: A sentence can be very short and still be complete: "She wrote." has a subject (She) and a main verb (wrote). Length does not determine whether a sentence is complete; the presence of a subject and main verb in an independent clause does.
Often heard: A fragment always lacks a verb.
Actually: Some fragments have a verb but still lack a main verb: "Running to the library" contains a verbal (running) but no finite main verb. Others have verbs in dependent clauses: "Although she revised the paper" has a verb (revised) but is still a fragment because it cannot stand alone.
Often heard: Fragments are always wrong and should never appear in writing.
Actually: Intentional fragments serve legitimate purposes in creative, journalistic and informal writing for emphasis, rhythm and effect. The issue is accidental fragments in formal writing, where completeness and clarity are expected. Knowing when a fragment is intentional vs unintentional is part of stylistic control.
Common questions
FAQ
What is a sentence fragment?+
A sentence fragment is an incomplete sentence that is missing a subject, a main verb, or the independence needed to stand alone as a complete thought. Despite beginning with a capital and ending with a full stop, it does not meet the grammatical requirements of a sentence. Fragments arise most often when dependent clauses or phrases are separated from their main clause.
How do I fix a sentence fragment?+
There are two main approaches. First, attach the fragment to a nearby complete sentence: "Because the deadline moved. We revised the plan." becomes "Because the deadline moved, we revised the plan." Second, add the missing element: supply the subject, the main verb, or both. Always check: does the result have a subject, a main verb, and the ability to stand alone?
What is the difference between a fragment and a run-on sentence?+
A fragment is too little — it is missing a required element (subject, main verb, or independent clause). A run-on is too much — it joins two or more independent clauses without proper punctuation or conjunction. Both are errors in formal writing, but they are opposite problems and require different fixes.
Going deeper
