How to ask permission_2?
Some students are sitting in an auditorium listening to their teacher. You open the door and want to invite one of the students to talk to you, and for that you need to get permission from their teacher. What should be said in situations like this one: 'May I...?'
Unless it were very urgent, I wouldn't interrupt the class. If I were to interrupt, I would knock on the door, and when the teacher acknowledged me, I would say, "I'm really sorry to interrupt, but may I please speak with Steve a moment?"