Questions & Answers about Na yi amfani da guduma.
Na means I here, but more specifically it is the 1st person singular subject form used with completed action. So in Na yi amfani da guduma, it tells you that the speaker is I and that the action is being presented as completed: I used ...
It is not just a stand-alone pronoun in the same way as English I. In Hausa, forms like na, ka, ya, ta often work together with aspect.
Yi is the verb to do / to make. In this sentence, though, it is part of the fixed expression yi amfani da, which means to use.
So it is better to learn this as a chunk:
- yi amfani da ... = to use ...
If you translate too literally, you may get something like do use of, which sounds odd in English. But in normal Hausa, this is just the standard way to say use.
Amfani on its own is related to use, usefulness, benefit, profit, advantage depending on context.
But in this sentence, the important thing is the expression:
- yi amfani da ... = use ...
So while amfani has its own meaning, in this pattern you should mainly recognize the whole phrase rather than trying to interpret every word separately each time.