Questions & Answers about Ina son wannan da gaske.
Because ina already includes the idea of I. In this kind of sentence, it marks first person singular and a present/imperfective sense.
So ina son... is a very common Hausa pattern for saying things like I like..., I want..., or I love..., depending on context.
You do not need a separate word for I unless you want extra emphasis.
Many learners first meet the base form so, but in the very common pattern ina son + object, the form son is what you normally see.
So it is best to learn ina son... as a chunk:
- ina son wannan
- ina son ka
- ina son abinci
In other words, son is the expected form in this sentence, not a mistake.
Wannan means this or this one.
It can stand alone, just like English this, when the thing being talked about is already clear from the situation. So the sentence does not need an extra noun after it.
For example, if someone shows you a shirt, a song, a dish, or an idea, you can simply say Ina son wannan da gaske.