Ni na sani.

I know.

Breakdown of Ni na sani.

• ni: I
• sani: to know

Questions & Answers about Ni na sani.

What do the individual words Ni na sani mean?

• Ni = I / me (independent pronoun).
• na = I as a subject marker on the verb (1st person singular, perfective aspect).
• sani = to know / knew (verb).

So literally: “I, I-know.”

Why are there two “I” elements (both ni and na) in this short sentence?

Hausa often uses both the independent pronoun (ni) and the verb-attached subject marker (na) to add focus or emphasis.

• Na sani = I know / I knew.
• Ni na sani = I know (as opposed to someone else), “It’s me who knows.”

The doubling is not a mistake; it is a normal way to mark contrastive focus on the subject.

What is the difference between “Na sani” and “Ni na sani”?

• Na sani: neutral “I know / I knew.”
• Ni na sani: focused, something like “I’m the one who knows”, “I know (not someone else).”

You would typically use Ni na sani when answering a “who” question or correcting someone, e.g. after “Wa ya sani?” (Who knows?) you say “Ni na sani.”

Does “Na sani / Ni na sani” mean “I know” or “I knew”?

Grammatically the form na sani is perfective, which very often corresponds to past (“I knew”).
However, with verbs of knowing, seeing, etc., Hausa commonly uses the perfective for present knowledge, so Na sani is usually understood as “I know” in context.
Only the context tells you whether the time is present (“I know”) or past (“I found out / I knew”).

Why don’t we say “Ina sani” for “I know”?

Ina is the imperfective/continuous form (“I am …‑ing”), so ina sani would feel like “I am knowing,” which is unusual for a stative verb like “know.”
For knowledge, the perfective (na sani) is the normal choice, and it usually covers the English simple present “I know.”

Is na here the same as the na used between nouns, like in littafin Audu na Hausa?

No. They are different functions that just happen to have the same form:

• In Ni na sani / Na sani, na is a subject marker meaning “I (did X)”.
• Between nouns, na is a linker / genitive particle, roughly like “of” (e.g. littafi na Hausa = “Hausa book / book of Hausa”).

The pronunciation is similar, but their grammatical roles are not the same.

What kind of pronoun is ni, and what kind is na?

• ni is an independent (strong) pronoun used for emphasis, isolation, answers to “who?”, contrast, etc.
• na (in na sani) is a clitic subject pronoun attached to the verb and also carries aspect/tense information (perfective 1st person singular).

In Ni na sani, Hausa stacks them: one for focus (ni), one for normal verb agreement and aspect (na).

Can I change the word order and say “Na sani ni”?

No, that is not the normal way to say it.
The focused subject comes before the verb phrase, so you say Ni na sani, not Na sani ni.
Na sani ni would sound odd or be interpreted differently, and is not the standard pattern for this meaning.

How would I say “I didn’t know” versus “It’s not I who knew”?

For a simple negative of the verb:

• Ban sani ba. = I didn’t know.

For a focused negative subject (denying that you were the knower):

• Ba ni ne na sani ba. ≈ It’s not I who knew / I’m not the one who knew.

Compare with our positive:

• Ni ne na sani. = I am the one who knew / knows.

Is “Ni na sani” polite, or does it sound too strong?

On its own, Ni na sani is neutral but emphatic.
In a calm context (e.g. just answering “Who knows?”) it is fine and not rude.
If you stress it strongly in argument, it can sound like “I’m the one who knows, not you,” so the tone of voice and situation matter for how forceful it feels.