[MrPedantic]

Hello Bboy

I think it's rather that "to be married" expresses the state of marriage, whereas "to graduate" expresses the action of becoming a graduate.

If you were to say "I was graduated 5 years ago", however, it would suggest that someone had somehow "graduated" you. This sense doesn't normally exist (no one can "graduate" someone).

As for more examples, did you mean examples of verbs that express states?

All the best,

MrP