do I not concern? do you not concern? does he not concern? do we not concern? do you not concern? do they not concern?
Presente continuo
am I not concerning? are you not concerning? is he not concerning? are we not concerning? are you not concerning? are they not concerning?
Pretérito
did I not concern? did you not concern? did he not concern? did we not concern? did you not concern? did they not concern?
Pretérito continuo
was I not concerning? were you not concerning? was he not concerning? were we not concerning? were you not concerning? were they not concerning?
Presente perfecto
have I not concerned? have you not concerned? has he not concerned? have we not concerned? have you not concerned? have they not concerned?
Presente perfecto continuo
have I not been concerning? have you not been concerning? has he not been concerning? have we not been concerning? have you not been concerning? have they not been concerning?
Pluscuamperfecto
had I not concerned? had you not concerned? had he not concerned? had we not concerned? had you not concerned? had they not concerned?
Pluscuamperfecto continuo
had I not been concerning? had you not been concerning? had he not been concerning? had we not been concerning? had you not been concerning? had they not been concerning?
Futuro simple
will I not concern? will you not concern? will he not concern? will we not concern? will you not concern? will they not concern?
Futuro continuo
will I not be concerning? will you not be concerning? will he not be concerning? will we not be concerning? will you not be concerning? will they not be concerning?
Futuro perfecto
will I not have concerned? will you not have concerned? will he not have concerned? will we not have concerned? will you not have concerned? will they not have concerned?
Futuro perfecto contínuo
will I not have been concerning? will you not have been concerning? will he not have been concerning? will we not have been concerning? will you not have been concerning? will they not have been concerning?
Condicional
Presente
would I not concern? would you not concern? would he not concern? would we not concern? would you not concern? would they not concern?
Presente continuo
would I not be concerning? would you not be concerning? would he not be concerning? would we not be concerning? would you not be concerning? would they not be concerning?
Passado
would I not have concerned? would you not have concerned? would he not have concerned? would we not have concerned? would you not have concerned? would they not have concerned?
Passado continuo
would I not have been concerning? would you not have been concerning? would he not have been concerning? would we not have been concerning? would you not have been concerning? would they not have been concerning?