How to Sign "Before" in American Sign Language (ASL)
In ASL, "before" is signed by holding your dominant hand in front of your body, palm facing down, and moving it backward over your shoulder. The sign shows that the past is behind us and the future is ahead. This movement can be made longer or shorter, or you can add facial expressions to change its meaning. It's a common sign. You can use it with other time signs to be more specific about when something happened.