May I know how to use was/is when talking about past CEOs pupils etc. For example, when we talk about someone who is longer e.g. Reagan
1) Reagan is a past president ofthe U.S.A. or Regan was...
2) Regan is a past pupil of Eureka Colleage or Regan was..
The words past/alumnus/former etc already mention they are not currently in those positions. So, is it necessary to put was instead of is ?
Also I want to know does this rule change based on the fact are they still living or not. For example Obama was/is the first African-American president of the United States ? What if we talk about him when he was in office. Say in 2010 is it still Obama was or is ?