Será ud its the short form of será usted you can use it for a question like Será usted el azafato del vuelo? Are you the flight assistant? I’m Spanish, if you need help, ask me whenever you want, and please, if I was useful please let Brainly know!
A good oneis yo estaba corriendo = I was running as estaba can also be used for he/she was running or when using 3rd person singular él quiere ir a Madrid = He wants to go to Madrid -