I
would have second-guessed
you
would have second-guessed
he / she / it
would have second-guessed
we
would have second-guessed
you
would have second-guessed
they
would have second-guessed
I
would have been second-guessing
you
would have been second-guessing
he / she / it
would have been second-guessing
we
would have been second-guessing
you
would have been second-guessing
they
would have been second-guessing