I'm sure that from among the following sentences, the first sound natural to natives, but the question is that whereas 'being sorry' and 'being afraid' are the same, then whether 'afraid' is usable in the following ways as numbers 3 and 4 or not?
- I’m sorry for being absent last session; I was on a trip.
- I’m sorry that I was absent last session; I was on a trip.
- I’m afraid for being absent last session; I was on a trip.
- I’m afraid that I was absent last session; I was on a trip.