run-on sentence
B2-C1Formal, Academic, Educational
Definition
Meaning
A grammatical error where two or more independent clauses are joined without proper punctuation or conjunctions.
A sentence that lacks appropriate grammatical boundaries, often resulting in a confusing or overly long structure that impedes readability. It can also refer to the stylistic effect of deliberately joining clauses to convey urgency, stream-of-consciousness, or overwhelming emotion in creative writing.
Linguistics
Semantic Notes
Primarily a term from grammar and composition pedagogy. While it denotes an error in formal writing, it can be an intentional stylistic device in literature (e.g., James Joyce, William Faulkner). The term is metalinguistic—used to talk about language itself.
Dialectal Variation
British vs American Usage
Differences
The term is identical in both varieties. The concept is taught similarly, though British style guides may use the term 'comma splice' more specifically for clauses joined only by a comma.
Connotations
Universally negative in instructional contexts regarding formal writing.
Frequency
Equally common in academic and educational settings in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] wrote/writes a run-on sentence.The paragraph contains several run-on [structures].Her essay was marked down for [numerous] run-ons.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “It's a bit of a run-on. (informal critique)”
- “Don't run your sentences together.”
Usage
Context Usage
Business
Used in reports or communications training to advocate for clarity and conciseness, e.g., 'Please revise the memo to eliminate run-on sentences for better readability.'
Academic
A key term in composition classes and style guides, e.g., 'The student's argument was strong, but her prose was weakened by frequent run-on sentences.'
Everyday
Used informally to critique unclear writing or speech, e.g., 'Sorry, that was a run-on sentence—let me rephrase.'
Technical
Used in linguistics and computational grammar checking to describe specific clause-combining errors.
Examples
By Part of Speech
noun
British English
- The most frequent issue in first-year essays is the run-on sentence.
- He tends to write in lengthy run-ons when he's excited.
American English
- Her teacher circled three run-on sentences in the draft.
- That paragraph is just one giant run-on.
Examples
By CEFR Level
- This sentence is too long it needs a full stop.
- I like cakes I eat them every day. (run-on)
- I went to the shop I bought some milk then I came home, it was a long day. (run-on)
- To fix a run-on, you can add a period or a word like 'and' or 'but'.
- Although the author's ideas were compelling, her tendency to write run-on sentences made the text difficult to follow, which unfortunately undermined her overall argument.
- A comma splice, a type of run-on sentence, occurs when two independent clauses are joined solely by a comma.
- The novelist's deliberate use of run-on sentences masterfully mirrored the protagonist's frantic, stream-of-consciousness panic.
- Legalese is often criticized not merely for its jargon but for its labyrinthine, run-on sentence structures that obscure meaning.
Learning
Memory Aids
Mnemonic
Think of a train (sentence) that should have couplings (conjunctions/punctuation) between carriages (clauses). A RUN-ON sentence is like a train where carriages have RUN ON into each other without proper couplings.
Conceptual Metaphor
WRITING IS A JOURNEY / SENTENCES ARE VEHICLES. A run-on sentence is a vehicle that fails to stop at required stations (punctuation).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Russian often uses commas or dashes where English requires periods or conjunctions due to different rules of clause combination. Direct translation of a long Russian sentence with multiple clauses often results in an English run-on.
- The concept of 'сложное предложение' (complex sentence) in Russian allows for comma links between independent clauses, which is not permissible in standard English.
Common Mistakes
- Confusing a long but grammatically correct compound-complex sentence with a run-on.
- Correcting a run-on by creating a comma splice instead.
- Overusing semicolons to 'fix' run-ons, leading to stylistically awkward prose.
- Using 'and' repeatedly to join clauses, creating a different stylistic issue.
Practice
Quiz
Which of the following is a correctly revised version of this run-on sentence: 'It was raining we decided to stay indoors.'?
FAQ
Frequently Asked Questions
No. A sentence can be very long yet grammatically correct if it uses proper subordination, coordination, and punctuation (e.g., a complex-compound sentence). A run-on specifically involves improperly joined independent clauses.
1. Use a period to create two separate sentences. 2. Use a semicolon (if the clauses are closely related). 3. Use a comma followed by a coordinating conjunction (for, and, nor, but, or, yet, so). 4. Use a subordinating conjunction (because, although, since, etc.) to make one clause dependent.
A comma splice is a specific type of run-on sentence where two independent clauses are joined only by a comma. All comma splices are run-ons, but not all run-ons are comma splices (e.g., clauses with no punctuation at all).
In formal academic or business writing, they are considered errors. However, in creative writing, journalism, or informal dialogue, they can be used intentionally to create a specific rhythm, convey excitement, confusion, or stream-of-consciousness thought.