Why your brain prefers patterns over linguistic chaos
In short: Grammar is often taught as a rigid set of laws, but some rules are actually stylistic choices. Parallel structure is one of them. It isn't just about being correct; it is about creating a rhythmic consistency that signals to the reader that every idea holds equal weight.
Syntax is the study of how sentences work—specifically, the ordering of language. Within this field, parallel structure refers to using the same pattern of words to indicate that two or more ideas possess the same level of importance. This symmetry can occur at the word, phrase, or clause level. By maintaining a consistent pattern, writers help the reader navigate complex information without the cognitive friction caused by shifting grammatical structures.
The mechanics of parallelism often involve coordinating conjunctions like 'and' or 'or.' For instance, when listing activities, a writer must choose a consistent form: either the -ing form (gerunds) like 'hiking, swimming, and bicycling,' or infinitive phrases like 'to hike, to swim, and to ride.' A common pitfall is mixing these forms, such as 'hiking, swimming, and to ride,' which breaks the established pattern. Similarly, adverbs must remain consistent; 'quickly, accurately, and thoroughly' is parallel, whereas 'quickly, accurately, and in a detailed manner' is not.
At the more complex clause level, parallelism requires that if a sentence begins with a clause, it must continue with clauses. This means maintaining the same pattern and the same verb voice—avoiding a shift from active to passive. For example, a sentence describing a coach's instructions should not switch from 'that they should get sleep' to 'to do some warm-up exercises.' Instead, it should maintain the 'that' clause structure throughout to ensure the sentence remains balanced and clear.
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Sources
- Summary by Intellect · source: Parallel structure | Syntax | Khan Academy
- Also: Parallel Structure - Purdue OWL® - Purdue University
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