Questions & Answers about Musa yana karatu a ɗaki har yanzu.
Yana marks an ongoing action for a masculine singular subject, so here it means something like he is ...-ing.
In Musa yana karatu:
- Musa = Musa
- yana = he is / he is engaged in
- karatu = reading/studying
So yana is a key part of saying that the action is happening now or is currently in progress.
Yes, from an English point of view it can feel a bit like that, but this is normal Hausa grammar.
With a named subject like Musa, Hausa still uses the appropriate subject marker in the predicate:
- Musa yana karatu
- Aisha tana karatu
So even though Musa already tells you who the subject is, yana is still required to form the clause naturally.