- We use may, can, be allowed to for permission.
E.g You can ask questions at the end of talk
I'm allowed to have a party for my birthday.
2. We use could or was/were allowed to for general permission in the past. For specific events, we use was/were allowed to.
E.g When I was younger, I could play with my friends every night
They were allowed to go to the concert last nigt.