excuse me
I am sorry to interrupt you:
Excuse me, where is the bathroom?
excuse me
Excuse me is also used to say you are sorry for having done something, esp. unintentionally, that might be annoying to other people.
excuse me
You might also use excuse me as a question when you want someone to repeat something that person has said because you could not hear it:
"Excuse me? I didn’t get that last part."