what's the difference between "allein" and "alleine" ?
please, give me kindly some examples.
Might "sound" better to some, but still it doesn't make a difference and hasn't anything to do with time (now, always or whatever). You could still say "Jetzt bin ich allein" or "Jetzt bin ich alleine". It really does not make a difference.
BUT: "Allein" is the formal and correct word to use. "Alleine" is rather colloquial and often used by children.