do I concern? do you concern? does she concern? do we concern? do you concern? do they concern?
Presente continuo
am I concerning? are you concerning? is she concerning? are we concerning? are you concerning? are they concerning?
Pretérito
did I concern? did you concern? did she concern? did we concern? did you concern? did they concern?
Pretérito continuo
was I concerning? were you concerning? was she concerning? were we concerning? were you concerning? were they concerning?
Presente perfecto
have I concerned? have you concerned? has she concerned? have we concerned? have you concerned? have they concerned?
Presente perfecto continuo
have I been concerning? have you been concerning? has she been concerning? have we been concerning? have you been concerning? have they been concerning?
Pluscuamperfecto
had I concerned? had you concerned? had she concerned? had we concerned? had you concerned? had they concerned?
Pluscuamperfecto continuo
had I been concerning? had you been concerning? had she been concerning? had we been concerning? had you been concerning? had they been concerning?
Futuro simple
will I concern? will you concern? will she concern? will we concern? will you concern? will they concern?
Futuro continuo
will I be concerning? will you be concerning? will she be concerning? will we be concerning? will you be concerning? will they be concerning?
Futuro perfecto
will I have concerned? will you have concerned? will she have concerned? will we have concerned? will you have concerned? will they have concerned?
Futuro perfecto contínuo
will I have been concerning? will you have been concerning? will she have been concerning? will we have been concerning? will you have been concerning? will they have been concerning?
Condicional
Presente
would I concern? would you concern? would she concern? would we concern? would you concern? would they concern?
Presente continuo
would I be concerning? would you be concerning? would she be concerning? would we be concerning? would you be concerning? would they be concerning?
Passado
would I have concerned? would you have concerned? would she have concerned? would we have concerned? would you have concerned? would they have concerned?
Passado continuo
would I have been concerning? would you have been concerning? would she have been concerning? would we have been concerning? would you have been concerning? would they have been concerning?