I'm going over the entry for のだ in my grammar dictionary, and I pretty much understand the meaning, but I'm unsure about casual question forms:
- んだ (male) / の (female) んだい? (male) / の? (female)
The female form I am okay with. But I have never heard だい before, and I remember being told that it's very uncommon. I think males might simply say
Am I correct? But I've read that this can sound too interrogative or accusatory if the intonation is not right, so how would I say it properly?
Finally, I've seen のか, what is the difference? Is it feminine?