Dear colleagues,

I´ve found this joke on the internet:

Mum, do all fairy tales begin with “Once upon a time”?

No, darling. Some start with: “Sorry I’m so late, darling, I was detained at the office."

Would it also be possible to replace the last sentence with

I´ve been detained at the office

or

I had been detained at the office?

Why or why not? If it´s possible, how exactly would it change the meaning?

Thanks for your help.

Lenka