In the spoken version of this sentence, is it only the tone of voice that identifies it as a question?
This is a good question. I was taught that to indicate a question in Swahili, you begin the sentence with "Je," but this course does not seem to use that.
A belated thanks.
Lighting a fire is acceptable for 'igniting'
How about, "mom are you lighting the fire?"
Then it would be unawasha. The a- prefix can only be used for third person, not second