Questions & Answers about Na yi wanka jiya da dare.
Na in this sentence is the subject pronoun “I” in the completed (perfective) aspect. It is the normal way to say “I [did something]” in Hausa.
- Na yi wanka = I bathed / I took a bath.
- Na ci abinci = I ate food.
Ni is a different kind of pronoun: it is the independent/emphatic “I”. You use ni mainly for emphasis or after certain prepositions:
- Ni na yi wanka. = It was me who bathed.
- Ba ni ba. = Not me.
So in a neutral sentence like this, you say Na yi, not Ni yi.
If you strongly emphasize I, you can say Ni na yi wanka jiya da dare.