When you reach your 18th birthday, we'll give you a car. - Can be an instant. When the sun is out, it's generally light. - Can be an extended time. When I was young ... While you are still in school we expect you to study. - Usually a duration, extended time. While you were gone, we voted you out :) While I might try to answer this, you must be the judge of quality? - Not time related. meaning - "understanding that" or "even though". .