- I'd be happy to see Jim as manager.
- That might be a little confusing because they know me as manager.
- We will work with him on the issue, in his capacity as manager of the company.
- But as manager, you can hire your own staff.
Why isn't any article added after "as" and before the noun? in comparison with below examples:
- As a police officer, violence is part of my everyday life.
- I'm not here as a friend.
Is there any specific grammar rule for such phrases?