Answered By: Writing Center Last Updated: Nov 05, 2015 Views: 0
Unless means if not.
e.g.: Please stay unless you really have to go.
As long as/providing/provided means if or on condition.
e.g.: You can stay as long as you'll help pay for the room rental fee.
The Learning Commons
140 William T. Jerome Library
Bowling Green State University
Bowling Green, OH 43403