Not Only But Also Sentences | Rules And Real Examples

You’ve seen the pattern: “not only … but also …”. It’s short, punchy, and it can make a point feel cleaner than stacking two separate sentences.

The catch is that it’s picky. When the two parts don’t match, readers feel a wobble, even if they can’t name the rule. This page shows how to keep the pattern smooth in school writing, emails, and essays.

Fast Patterns You Can Copy

Pattern	When It Fits	Sample Sentence
Not only + verb, but also + verb	Two actions by the same subject	She not only sketched the plan, but also built the model.
Not only + noun, but also + noun	Two things in a list	The course teaches not only grammar, but also style.
Not only + adjective, but also + adjective	Two traits of one thing	The solution is not only simple, but also reliable.
Not only + adverb, but also + adverb	Two ways an action happens	He spoke not only clearly, but also calmly.
Not only + prepositional phrase, but also + prepositional phrase	Two places, times, or conditions	The policy applies not only in class, but also on field trips.
Not only + clause, but also + clause	Two full ideas with their own verbs	Not only did the data match, but also the method held up.
Not only + “to” verb, but also + “to” verb	Two goals or plans	We met not only to plan, but also to assign roles.
Not only + gerund, but also + gerund	Two activities as nouns	Not only studying, but also sleeping well, helped his scores.
Not only + “because” clause, but also + “because” clause	Two reasons with the same shape	She succeeded not only because she practiced, but also because she reviewed.

Using Not Only … But Also In Formal Writing

Not Only But Also Sentences In Formal Writing

The “not only … but also …” pair is a set of correlative conjunctions. That sounds technical, but the idea is plain: you’re joining two pieces that belong side by side.

In formal writing, the pattern adds emphasis without shouting. It can show that a claim has two parts, or that a result has two causes, or that a person has two strengths.

Parallel Parts Make The Sentence Sound Right

Parallelism means the two joined parts use the same grammatical form. If the first half is a noun, the second half should be a noun. If the first half is a verb phrase, the second half should be a verb phrase.

Try this quick test: block out the words “not only” and “but also,” then read just the two joined pieces as a mini list. If the list feels even, you’re close.

• Even list: “grammar” + “style”
• Uneven list: “grammar” + “writing clearly”

If you catch an uneven pair, you don’t need fancy edits. You can swap one side so both sides match.

Comma Choices And Where The Break Goes

Many writers place a comma before “but also” when the sentence has a natural pause.

In school essays, a comma is a safe default, since it prevents misreads.

One warning: don’t put a comma between a verb and its object just because “but also” feels like a pause. The grammar relationship still matters.

Inversion After “Not Only”

When “not only” starts the sentence, English often flips the order of the subject and an auxiliary verb. This is called inversion. It’s the same flip you see in questions, but the sentence is still a statement.

Compare the pair:

• Normal order: “She not only finished early, but also helped a friend.”
• Inversion: “Not only did she finish early, but she also helped a friend.”

Notice the helper verb did. That helper shows tense, and the main verb stays in its base form: “did finish,” not “did finished.”

Where “Also” Belongs

“Also” often sits right after the subject in the second half: “but she also helped.” That placement reads clean and keeps the rhythm steady.

How To Build The Pattern Step By Step

If you want a reliable method, build the sentence in three moves. You can do it on scratch paper in under a minute, then type the polished version.

Step 1: Write The Two Parts As A Plain List

Start with the two ideas you want to join, written as a list with no special phrasing. Keep them the same type of phrase.

• Action + action: “review the sources” / “check the math”
• Noun + noun: “clarity” / “credibility”

Step 2: Add “Not Only” Before The First Part

Place “not only” right before the first item in your list. Don’t move other words yet. Keep the sentence readable.

Step 3: Add “But Also” Before The Second Part

Place “but also” before the second item. Read the sentence aloud. If it feels lopsided, match the forms again.

It’s a clean habit.

This is where many not only but also sentences go wrong. Writers start with one structure, then drift into a different one on the second half. The list-first method blocks that drift.

When Inversion Is Needed In Your Draft

If “not only” comes after the subject, inversion is not needed: “The study not only raised questions, but also answered several.”

If “not only” starts the whole sentence, inversion often sounds best: “Not only did the study raise questions, but it also answered several.”

Common Uses In Essays, Emails, And Reports

Writers lean on this structure in three situations: when a claim has two parts, when a result has two causes, and when a person or plan has two strengths. The best use cases keep the two halves balanced.

Adding A Second Point Without A Run-On

Instead of chaining ideas with “and,” you can use “not only … but also …” to show that the second point carries extra weight.

Showing Two Causes Or Two Reasons

This pattern works well with reason phrases that match. If you start with “because,” keep “because” on both sides. If you start with “due to,” keep “due to” on both sides.

For a clear check on parallelism, you can compare your draft with guidance on parallel structure from Purdue OWL Parallel Structure.

Keeping Tone Measured

Because the pattern adds emphasis, it can sound dramatic if you stack it again and again. In a page-long essay, one or two uses is plenty.

Mistakes That Make The Pattern Feel Off

Most errors fall into a few buckets: mismatched forms, missing pieces, and inversion slips. Fixing them is usually a small rewrite, not a full rebuild.

Two Forms That Don’t Match

This is the classic slip: a noun on one side and a verb phrase on the other, or a “to” verb on one side and a gerund on the other. The reader feels the bump.

Missing “Also” Or Overusing It

In many sentences, “also” helps the cadence. In other sentences, it adds clutter. Read the second half with and without it, then keep the cleaner line.

Inversion With The Wrong Verb Form

When you use “did,” “does,” or “do,” the main verb stays in base form. When you use “has” or “have,” the main verb becomes a past participle. Mixing those forms is a common slip.

Draft Problem	What Sounds Wrong	Clean Rewrite
He is not only smart, but also works hard.	Adjective + verb phrase don’t match	He is not only smart, but also hardworking.
She not only likes reading, but also to write.	Gerund + “to” verb don’t match	She not only likes reading, but also likes writing.
Not only she finished early, but also she helped.	Inversion missing after sentence-start “not only”	Not only did she finish early, but she also helped.
Not only did he wrote the script, but he also edited it.	Base verb needed after “did”	Not only did he write the script, but he also edited it.
The plan not only reduced costs, but improved morale.	Second marker missing in a formal line	The plan not only reduced costs, but also improved morale.
Not only did the team win, but also the crowd cheered.	Second half needs a clear subject pattern	Not only did the team win, but the crowd also cheered.
She not only finished the report but also, sent it late.	Comma splits verb and object	She not only finished the report, but also sent it late.
Not only has he finish the lab, but he also wrote notes.	Past participle needed after “has”	Not only has he finished the lab, but he also wrote notes.

Style Choices That Help Readers Trust The Sentence

Even when the grammar is correct, a few style moves make the line easier to scan.

Keep The Joined Parts Similar In Length

When one half is three words and the other half is twenty, the pattern can feel top-heavy. You can shorten the long half or expand the short half so they meet in the middle.

Use The Pair For A Real Contrast In Weight

The phrase “not only” sets up a surprise. If the first half is tiny, the surprise falls flat. Use it when the first half is already a solid claim, then add a second claim that strengthens it.

Check Meaning With A Simple Swap Test

Swap “not only … but also …” with a plain “and,” then read the sentence. If the meaning barely changes, you may not need the pair. If the pair adds a clear lift in emphasis, keep it.

Use A Reliable Reference When You’re Unsure

When you want a quick confirmation that your placement matches standard usage, the Cambridge Dictionary Grammar Note On “Not Only … But Also” shows common patterns and word order.

Mini Templates For Clean Drafting

These templates are meant for fast drafting. Replace the brackets with your own words, then run the parallelism test.

Templates Without Inversion

• [Subject] not only [verb phrase], but also [verb phrase].
• [Subject] is not only [adjective], but also [adjective].

Templates With Inversion

• Not only did [subject] [base verb], but [subject] also [past tense verb].
• Not only are [plural subject] [adjective], but [plural subject] are also [adjective].

Editing Checklist You Can Run In Two Minutes

1. Underline the two parts after “not only” and “but also.”
2. Label each part: noun, verb phrase, adjective, prepositional phrase, or clause.
3. Make both labels match. If they don’t, rewrite one side.
4. If the sentence starts with “not only,” check inversion and the verb form after the helper verb.
5. Read the sentence aloud once. If you stumble, shorten the longer half.
6. Check commas. Don’t split a verb from its object.

If you build and edit with this checklist, not only but also sentences start to feel easy to write, and the emphasis lands where you want it.

When you’re proofreading, scan for repeated patterns across a paragraph. One good “not only … but also …” can lift a line; three in a row can weigh it down.