you shouldn't have
No debiste hacerlo sin preguntarme primero.
You shouldn't have done it without asking me first.
You shouldn't have written that.
You shouldn't have come back.
No debiste haber tomado prestado el auto de Tom.
You shouldn't have borrowed Tom's car.
You shouldn't have said it.
Mucha gente te va a decir que no debiste haber hecho eso.
A lot of people are going to tell you that you shouldn’t have done that.