Parallel Structure: Make Your Sentences Flow
Keep lists and comparisons balanced for professional clarity.
Quick Answer
Parallel structure means using matching grammatical patterns for words, phrases, or clauses that serve the same function.
Fix it by identifying the shared sentence frame, then making each coordinated item fit that frame.
Memory check: Read the sentence frame before each item: She likes reading, likes swimming, and likes biking. If one item no longer fits, revise the series.
🔑 Key Takeaway
Match equal ideas at the same grammatical level: noun with noun, phrase with phrase, or clause with clause.
Where to Check Parallel Structure
When words, phrases, or clauses express equal ideas in the same construction, parallel form makes their relationship explicit. Check these four recurring locations.
| Structure | The items must match in… | Example |
|---|---|---|
| Lists joined by and / or | part of speech / phrase type | reading, writing, and editing (all -ing) |
| Correlatives (not only…but also, either…or) | the form after each half | not only fast but also affordable |
| Paired comparison (not so much…as) | the grammatical structure on both sides | not so much opposed to revising as it is to delaying |
| Comparable CV descriptions | one chosen structure across entries | If one description uses complete sentences, use them in every description. |
Common Mistakes
She likes reading, swimming, and to bike.
She likes reading, swimming, and biking.
The role involves analyzing data, report writing, and to present findings.
The role involves analyzing data, writing reports, and presenting findings.
The plan is not only ambitious but also it is risky.
The plan is not only ambitious but also risky.
The committee is not so much opposed to revising the plan as delaying the vote.
The committee is not so much opposed to revising the plan as it is to delaying the vote.
🎯 Test Your Knowledge
1. Make it parallel: "The job requires planning, budgeting, and ___ the team."
2. "She works efficiently, carefully, and ___."
3. "The phone is not only sleek but also ___."
4. "He came here to rest and ___."
5. "The team managed the budget, ___ the campaign, and led the launch."
See It Live: Parallel Structure at Work
The seed coordinates two gerund phrases with a how to clause. A parallel revision uses three gerund phrases, but the exact checker test did not report the mismatch.
Manual revision: The workshop covers writing clearly, editing quickly, and presenting confidently.
On July 16, 2026, both the exact seed and the parallel revision returned no issues. This is a documented false negative for one list; it does not establish the checker's behavior on every parallelism pattern.
Frequently Asked Questions
Why is "She likes running, swimming, and to bike" nonparallel?
Does parallel structure apply to a CV?
Do correlative conjunctions require parallel structure?
Does parallel structure apply to paired comparisons?
Can the checker detect every parallel-structure error?
Source-Backed Boundaries
Purdue OWL's parallel-structure guide defines the pattern across words, phrases, and clauses joined by coordinating conjunctions.
The MLA Style Center's conjunction guide states that coordinating conjunctions join elements of equal weight and the same grammatical character, and that correlative pairs should introduce units in the same form.
UW–Madison's faulty-parallelism guidance demonstrates how equal ideas in a series can be repaired with matching gerund phrases and how a paired not so much…as comparison can be balanced. Its CV guide separately recommends consistent formatting, structure, and content; it gives complete sentences across job descriptions as one example.
More Parallel Patterns
The package includes training, support, and updates.
The interface is fast, clear, and accessible.
The reviewer asked whether the data were complete and whether the conclusion followed.
The update is not only faster but also easier to audit.
Match Function, Not Just Endings
Parallel items do not need identical word counts or endings. They need comparable grammatical roles. In to review the draft and correct the citations, the second to is omitted but both verbs belong to the same infinitive phrase. Expand the shared frame when testing: to review and to correct.
Parallelism asks whether coordinated units share a grammatical frame. If the units already match but their time shifts without a reason, use the separate tense consistency guide. If the structure matches but the verb does not agree with its subject, review subject-verb agreement instead.
Related Articles
- Dangling Modifiers – Fix unclear descriptions
- Run-On Sentences – Clean up long sentences
- Tense Consistency – Keep time steady
- Subject-Verb Agreement – Balance subjects and verbs
- Academic Writing Words – Choose precise language for formal prose
- ← View All Grammar Guides
A Four-Pass Parallelism Edit
Use this pass after checking the sentence skeleton.
- Mark every coordinating or correlative conjunction and paired comparison markers such as not so much…as.
- Bracket the words, phrases, or clauses that the marker joins or compares.
- Name each unit's grammatical form: noun, gerund phrase, infinitive phrase, adjective, or clause.
- Choose one shared frame for equivalent units, rewrite any mismatch, and reread by repeating the governing words.
The Swap Test
Move one item into another item's slot. If the governing sentence must change, the forms may not be parallel. Check grammatical function and meaning, not just length or matching endings.
Make Your Writing Flow
Our exact mixed workshop list returned no issues. Use the checker as one pass, then bracket and compare each coordinated unit manually.
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