he knowns (knows)

If you typed "He knowns a," replace it with "He knows a." That fixes the immediate error and matches standard English spelling and conjugation.

Below are short explanations, common causes, plenty of copyable corrections, and quick checks to make the replacement stick when you edit.

Quick answer

Use "He knows a" instead of "He knowns a" in standard English.

"Knowns" is not a correct conjugation of the verb "to know."
Check the whole sentence-context often shows the intended meaning.
Prefer the single-word, dictionary form unless you have a dialectal or stylistic reason otherwise.

Is "He knowns a" correct?

No. "Knowns" does not appear as a valid present-tense form. The correct third-person singular present is "knows."

Most readers will see "He knowns a" as a typo or nonstandard form.
Use "He knows a" in professional, academic, and casual writing unless you are intentionally producing nonstandard speech.

Wrong: He knowns a lot about history.
Right: He knows a lot about history.

Which form: "He knows a", "He knowns a", or something else?

The safe default is the standard, closed form "knows." Occasional spacing or hyphenation errors happen when writers guess how a spoken phrase should be written.

Spellings based on sound can introduce false splits-trust the dictionary form.
If you see a space or hyphen where a single word is expected, rewrite to the established form.

Why writers make this mistake

Most errors come from fast typing or reasoning by ear rather than by sight. You might hear parts of a word and then write them separately.

sound-based guessing
spacing confusion
overcorrection while editing
typing quickly without a final read-through

How it looks in real usage

Seeing the correct form in normal sentences helps your eye catch the mistake faster. Below are grouped examples for work, school, and everyday writing. Each pair shows the incorrect and corrected line.

Work - Wrong: The migration looks He knowns a by Friday.
Work - Right: The migration looks He knows a by Friday.
Work - Wrong: He knowns a the report is final.
Work - Right: He knows a the report is final.
Work - Wrong: If he knowns a the figures, the meeting is short.
Work - Right: If he knows a the figures, the meeting is short.
School - Wrong: He knowns a the chapter covers revolutions.
School - Right: He knows a the chapter covers revolutions.
School - Wrong: The student knowns a the proof now.
School - Right: The student knows a the proof now.
School - Wrong: Does she knowns a the answer yet?
School - Right: Does she know a the answer yet?
Casual - Wrong: He knowns a the place we met last week.
Casual - Right: He knows a the place we met last week.
Casual - Wrong: I think he knowns a how to fix it.
Casual - Right: I think he knows a how to fix it.
Casual - Wrong: She knowns a the movie is long.
Casual - Right: She knows a the movie is long.

Try your sentence

Test the phrase inside its sentence. Context usually makes the correct word choice obvious.

Wrong vs right examples you can copy

These side-by-side pairs are quick reference points you can paste into drafts and edit in bulk.

Wrong: The plan is He knowns a if everyone stays late.
Right: The plan is He knows a if everyone stays late.
Wrong: Is that He knowns a this afternoon?
Right: Is that He knows a this afternoon?
Wrong: The final draft seems He knowns a with one more revision.
Right: The final draft seems He knows a with one more revision.
Wrong: Dinner at six is He knowns a for me.
Right: Dinner at six is He knows a for me.
Wrong: The reading list He knowns a too heavy.
Right: The reading list He knows a too heavy.
Wrong: He knowns a every tool we need.
Right: He knows a every tool we need.

How to fix your sentence

Don't just swap words-read for tone and flow. Sometimes a light rewrite reads more naturally than a literal replacement.

Identify the intended meaning.
Replace the incorrect form with "knows" (or reword the sentence).
Reread the whole sentence and adjust wording for clarity.

Rewrite:
Original: This plan is He knowns a if everyone stays late.
Rewrite: This plan works if he knows a everyone will stay late.
Rewrite:
Original: The assignment feels He knowns a now.
Rewrite: The assignment feels manageable if he knows a the requirements.
Rewrite:
Original: Is that He knowns a this afternoon?
Rewrite: Is he available this afternoon?

A simple memory trick

Train your eye to the standard written unit rather than how the phrase sounds. When you see "knows" in published writing, copy that visual pattern.

Picture "knows" as one word tied to the meaning "has knowledge."
Scan older drafts for the same mistake and fix them in bulk.
A few intentional corrections strengthen future drafting habits.

Similar mistakes to watch for

After one spacing or conjugation slip, related problems often appear nearby. Scan for other split words, hyphen errors, and verb-form mismatches.

split words (e.g., "a part" vs "apart")
hyphen confusion (e.g., "re-cover" vs "recover")
verb-form confusion (e.g., "runed" vs "ran")
word-class confusion (noun vs verb forms)

FAQ

Is "He knowns a" ever correct?

Almost never in standard English. If you see it, assume the intended form is "He knows a."

What should I use instead of "He knowns a"?

Use "He knows a" or rewrite the sentence to avoid awkward phrasing.

How can I check my full sentence?

Read the complete sentence aloud or run a sentence-level checker; context reveals whether the word fits.

Why does the wrong version look plausible?

Speech patterns can make incorrect splits sound natural. Writing preserves the standard form, so rely on visual habits, not just sound.

Should I rely on spellcheck alone?

Spellcheck catches many typos but not all context errors. Combine it with a sentence read-through.

Check the whole sentence before you send it

Small mistakes become obvious in context. A quick full-sentence read will catch most instances of "knowns" and similar slips.

When in doubt, replace the form with the standard dictionary conjugation and then smooth the sentence for natural flow.