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