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What Is Parallel Sentence Structure?
Parallel structure means using the same grammatical form for items that serve the same function in a sentence. When you write a list, a comparison, or a paired construction (like "not only... but also"), each element should follow the same pattern. Breaking that pattern is called faulty parallelism, and it makes sentences awkward to read.
For example, "She likes hiking, swimming, and to ride bikes" mixes gerunds with an infinitive. The parallel version is "She likes hiking, swimming, and riding bikes."
Common Parallelism Errors
Mismatched Lists
Lists are the most frequent source of faulty parallelism. Every item in a list should use the same word form.
- Wrong: "The job requires experience in coding, database management, and to communicate with clients."
- Fixed: "The job requires experience in coding, database management, and client communication."
Faulty Paired Constructions
Correlative conjunctions like "both... and," "either... or," "not only... but also," and "neither... nor" require parallel elements after each part of the pair.
- Wrong: "The software is both easy to install and it runs quickly."
- Fixed: "The software is both easy to install and quick to run."
Inconsistent Verb Forms
When a sentence uses multiple verbs in sequence, they should share the same tense and form unless the meaning requires a shift.
- Wrong: "The team planned the sprint, assigns the tasks, and delivered the update."
- Fixed: "The team planned the sprint, assigned the tasks, and delivered the update."
Why Parallelism Matters
Parallel structure improves readability by setting up a rhythm that readers can follow. It signals that the listed items carry equal weight. In persuasive writing and speeches, parallelism is a deliberate rhetorical tool ("government of the people, by the people, for the people"). In everyday professional writing, it simply keeps your sentences clean and scannable.
Paste your text into the checker above to find every instance of faulty parallelism, with suggestions for how to align your sentence elements.
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