"I will be sleeping on Wednesday."
Translation:Bidh mi a' cadal Diciadain.
Bidh mi - I will be; Cha bhi mi - I will not be, Am bi mi? - Will I be? Nach bi mi - Will I not be? Bi is a bit of an irregular verb. But there's not that many irregulars overall. Just some common ones.
So it's whether you're using a positive statement, or asking a question.