If you've ever paused while typing "he sais" and wondered whether it looked right, you're not alone. It's a surprisingly common spelling mistake that catches both native English speakers and learners. The confusion isn't between two accepted spellings—it's between one correct English word (says) and another word (sais) that doesn't function as an English verb at all.
Let's settle the question once and for all.
The Short Answer
Says is the only correct spelling when you're using the third-person singular form of the verb say.
Examples:
She says she's ready.
My teacher says the exam will be difficult.
The report says sales increased this year.
Sais is not an English verb. The only time you'll see sais in English is as the plural of sai, the traditional three-pronged martial arts weapon. If you're writing about speaking or expressing something, sais is always a spelling mistake.
Why Is "Says" Pronounced "Sez"?
One reason people mistakenly write sais is that says doesn't sound the way it looks.
Unlike words such as plays, stays, or days, says is pronounced "sez." It rhymes with fez, not days.
English pronunciation has changed over hundreds of years, while the spelling has mostly stayed the same. As a result, the pronunciation no longer matches what many learners expect. People often spell words the way they hear them, and sais seems like a logical attempt to represent the "sez" sound.
In French, endings such as -ais appear in many verb forms, so people familiar with French may accidentally transfer that spelling pattern into English.
Another reason the mistake survives is that many spell-checkers don't flag sais because it's already recognized as a valid word in other contexts. Since it's technically a real word, automatic corrections often leave it untouched even though it's incorrect in an English sentence.
The Grammar Rule Behind "Says"
The rule is straightforward.
In the present tense, say changes to says only when the subject is third-person singular.
Subject
Correct Form
I
say
You
say
He
says
She
says
It
says
We
say
They
say
Correct examples:
He says he'll call later.
My brother says he's busy.
The sign says parking is prohibited.
Incorrect examples:
He sais he'll call later.
My brother say he's busy.
Common Mistakes Related to "Says"
Even after learning that sais is incorrect, writers often make a few other mistakes.
1. Mixing Verb Tenses
Incorrect:
He says he was tired and said he needs rest.
Correct:
He says he's tired and needs rest.
Or:
He said he was tired and needed rest.
Keep your verb tenses consistent throughout the sentence.
2. Using "Says" After "Does"
When you use does or doesn't, the main verb returns to its base form.
Incorrect:
Does she says anything?
He doesn't says much.
Correct:
Does she say anything?
He doesn't say much.
The -s belongs to does, not the main verb.
Easy Ways to Remember the Difference
If you're unsure whether to write say or says, try replacing the subject with she.
She says → use says.
They say → use say.
Another useful memory trick is pronunciation. Remember that says sounds like "sez." Once you associate the pronunciation with the correct spelling, you're much less likely to type sais by mistake.
Why This Small Difference Matters
The word says appears constantly in English. You'll find it in news articles, emails, books, academic papers, business documents, and everyday conversations.
Because it's used so frequently, misspelling it can make your writing appear less polished. A single typo may not be a major issue, but repeatedly writing sais instead of says can distract readers and reduce your credibility.
Mastering this simple distinction also strengthens your understanding of subject-verb agreement, making it easier to avoid similar grammar mistakes elsewhere.
The Bottom Line
The answer is simple:
Says is the correct third-person singular form of the verb say.
Sais is not an English verb.
Says is pronounced "sez," which explains why many people accidentally misspell it.
If you're ever unsure, replace the subject with she. If she says sounds right, says is the correct choice.
Once you remember this rule, you'll never have to stop and wonder whether to write sais or says again.
