Sentences With Parallel Structure

Parallel structure keeps sentences balanced by repeating the same grammar form across a list or pair.

Parallel structure is one of those writing moves readers feel before they name it. When it’s there, the line sounds steady. When it’s missing, a sentence can feel lopsided, even if each word is spelled right.

This guide gives clear patterns, real fixes, and a quick self-check you can run on essays, emails, and academic paragraphs.

What Parallel Structure Means

Parallel structure means that items in a series, a comparison, or a paired construction use the same grammatical shape. If one item is a noun, the other items should be nouns too. If one item is a verb in the -ing form, the rest should match.

Where Parallel Structure Shows Up Most

Lists and series (three or more items)
Pairs joined by and or or
Comparisons using than or as
Correlative pairs like either/or, not only/but also, both/and

Sentences With Parallel Structure In Real Writing

In sentences with parallel structure, the reader can predict what comes next. That helps when a sentence carries several details, like steps in a method or reasons in an argument.

Uneven: The lab requires measuring samples, to record results, and careful labeling.
Parallel: The lab requires measuring samples, recording results, and labeling carefully.

Pattern	Uneven Sentence	Parallel Revision
Nouns in a list	Her strengths are patience, to plan ahead, and clear speech.	Her strengths are patience, planning ahead, and clear speech.
-ing verbs in a list	The job involves answering calls, filing forms, and to schedule visits.	The job involves answering calls, filing forms, and scheduling visits.
Infinitives in a list	My goal is to learn Spanish, practicing daily, and to travel with ease.	My goal is to learn Spanish, to practice daily, and to travel with ease.
Clauses after that	She believes that the plan is fair and the team can finish on time.	She believes that the plan is fair and that the team can finish on time.
Comparisons	Reading the article was easier than I could understand the chart.	Reading the article was easier than understanding the chart.
Either/or	You can either submit the form online or by dropping it at the office.	You can either submit the form online or drop it at the office.
Not only/but also	He not only finished early but also his work was accurate.	He not only finished early but also wrote accurately.
Paired adjectives	The tone should be clear and with respect.	The tone should be clear and respectful.

How To Build Parallel Lists

Most parallelism problems live inside lists. A list can be written as nouns, verbs, adjectives, or full clauses. The trick is picking one form and holding it steady.

Step 1: Name The Form

Circle the first item in the list and name its shape: noun, -ing, infinitive, clause, adjective. Then match the rest.

Step 2: Keep The Shared “Handle” Consistent

Many lists share a handle like to, an article (a, an, the), or a preposition (by, with, in). If the handle is there for one item, keep it for all items, or remove it from all items.

Uneven: She applied for a scholarship, an internship, and to a mentorship program.
Parallel: She applied for a scholarship, an internship, and a mentorship program.

Step 3: Watch For Category Mix-Ups

Lists work best when they name the same type of thing. Mixing a task, a tool, and a result in one list can confuse the reader. If you need all three, split it into two lists.

Step 4: Match The Punctuation To The List

If list items already contain commas, use semicolons to keep the parts clear. Also check that a colon is followed by a list that stays in one form. A colon sets up a promise: what follows should be a clean series, not a mix of sentence types.

Parallel Structure With Correlative Pairs

Correlative pairs work like matched brackets. The grammar after the first half should match the grammar after the second half.

Both/And

Uneven: She is both skilled in research and writes clearly.
Parallel: She is both skilled in research and clear in her writing.

Either/Or

Uneven: You can either revise tonight or the draft can be edited tomorrow.
Parallel: You can either revise tonight or edit the draft tomorrow.

Not Only/But Also

Uneven: The course not only teaches grammar but also students gain confidence.
Parallel: The course not only teaches grammar but also builds confidence.

For a quick reference you can trust, Purdue’s writing lab has a clear overview of parallel structure.

Parallel Structure In Comparisons

Comparisons need matching grammar too. When you use than or as, the two sides should be built from the same kind of words.

Uneven: Updating the resume was easier than I expected the interview to be.
Parallel: Updating the resume was easier than preparing for the interview.
Uneven: Her explanation was as clear as the chart helped.
Parallel: Her explanation was as clear as the chart was.

Editing For Parallel Structure

To edit for parallel structure, find the list or pair, underline each item, and label each one: noun, -ing, infinitive, clause, adjective. If one item breaks the pattern, change the outlier or rewrite the whole list in a new form.

Three Reliable Fix Moves

Convert to one verb form. Turn all actions into -ing verbs or all actions into infinitives.
Convert to noun phrases. Turn all items into nouns plus modifiers.
Split the sentence. If one item needs extra detail, pull it into its own sentence.

Mistakes That Slip Past Spellcheck

Spellcheck won’t flag parallelism because each word can be correct on its own. These slips show up often:

Mixing -ing And Infinitives

Uneven: The plan is for saving money, paying debt, and to invest later.
Parallel: The plan is for saving money, paying debt, and investing later.

Mixing Nouns And Clauses

Uneven: The report includes costs, timelines, and how the team will respond.
Parallel: The report includes costs, timelines, and response plans.

UNC’s writing center also has a clean handout on parallel structure that pairs well with the checklist above.

Parallel Structure In Bullets And Headings

Parallel structure isn’t only for full sentences. It also makes bullet lists and headings easier to skim. If one bullet starts with a verb, start the rest with verbs. If one heading is a noun phrase, keep the rest as noun phrases.

This matters in resumes, study notes, and slide decks because the reader’s eye jumps line to line. When the grammar matches, the list feels organized without extra words doing the work.

Uneven bullets: “Review the article,” “Editing the draft,” “Final checks.”
Parallel bullets: “Review the article,” “Edit the draft,” “Run final checks.”

A 10-Second Parallelism Test

When you suspect a problem, try this: read only the first word of each list item. If the first words don’t match in type, the list often needs a rewrite. Next, read the sentence with a short pause after each comma. If one item makes you back up and reread, that’s the outlier.

Then fix it with one move: turn all items into the same form, or split the sentence so the list stays clean.

Check	What To Scan	Fix Move
List items match	Items after commas, semicolons, or bullets	Pick one form and rewrite the outlier
Handles stay consistent	Repeated words like to, by, with, that	Repeat the handle for each item or drop it from all items
Correlative pairs align	either/or, both/and, not only/but also	Match grammar right after each half
Comparison sides match	Phrases around than and as	Rewrite the second side to mirror the first
Tense stays steady	Lists of verbs across time	Shift all verbs to the same tense unless time is part of the meaning
Voice stays steady	Active vs. passive inside one list	Turn all items active, or all items passive
Modifiers attach cleanly	Phrases that could attach to the wrong item	Move modifiers next to the word they describe
Items match category	Mixing a task, a tool, and a result	Group like things together or split into two lists

Practice: Fix These Sentences

Try these fast. Hide the “Fix” line, rewrite the sentence, then compare.

Sentence: The workshop teaches students to draft essays, revising paragraphs, and citation rules.

Fix: The workshop teaches students to draft essays, to revise paragraphs, and to follow citation rules.
Sentence: My routine includes stretching, a short walk, and to drink water.

Fix: My routine includes stretching, taking a short walk, and drinking water.
Sentence: She is admired for her honesty, working hard, and she stays calm.

Fix: She is admired for her honesty, her hard work, and her calm style.
Sentence: You can either email the file or the file can be uploaded to the portal.

Fix: You can either email the file or upload it to the portal.
Sentence: The memo explains what changed, why it changed, and the next steps.

Fix: The memo explains what changed, why it changed, and what comes next.
Sentence: The team values honesty, respect, and treating people with fairness.

Fix: The team values honesty, respect, and fairness.
Sentence: Reading the chapter was harder than I could take the quiz.

Fix: Reading the chapter was harder than taking the quiz.
Sentence: The app helps users track habits, budgeting, and to set reminders.

Fix: The app helps users track habits, budget wisely, and set reminders.
Sentence: He not only answered the question but also his tone stayed polite.

Fix: He not only answered the question but also stayed polite.
Sentence: The goal was to reduce stress, better sleep, and to eat on time.

Fix: The goal was to reduce stress, to sleep better, and to eat on time.

When It’s Fine To Break Parallel Structure

Parallel structure is a default for clarity, but you can break it on purpose when the meaning calls for a shift. One case is when you move from a list of actions to a final item that is a result, like a punch line.

If the reader might think it’s a mistake, keep the grammar matched and use a new sentence for the twist.

A Final Pass Before You Hit Submit

Underline each list and label each item on paper (noun, -ing, infinitive, clause, adjective).
Check correlative pairs by reading only the words right after each half.
Read comparisons out loud and listen for a wobble after than or as.
Fix the outlier first. If the sentence still feels off, rewrite the list in one form.

After this pass, your sentences with parallel structure will read smoother, and your points will land without grammar getting in the way right away.