okay, I am super bad on Arabic verb conjugation, but I do believe there is a difference between the imperative and the simple present, negated. I am basing this on all the other languages I know and the fact that Arabic has MORE conjugations than ANY of them, so I cannot fathom that there wouldn't be a difference. It is not logical, and Arabic, though extremely difficult, is also an extremely logical language in many respects.
I don't understand the difference between taskun and yaskun. I thought taskun might be used when speaking to a female and yaskun for males but then this sentence came up and I'm sure seth is a male name but taskun was used... I'd really appreciate it if anyone can explain this to me :)
Here we use "taskun(u)" (you live) because we talk with Seth (who is in front of us, is a male interlocutor). We do not talk about him, which it will be "yaskun(u)" (he lives).
1) you (2nd person masc. sing.) live = she (3rd person fem. sing.) live = تَسْكُنُ taskun(u)
2) he (3rd person masc. sing.) live = يَسْكُنُ yaskun(u)