don't I cost? don't you cost? doesn't he cost? don't we cost? don't you cost? don't they cost?
Presente continuo
am I not costing? aren't you costing? isn't he costing? aren't we costing? aren't you costing? aren't they costing?
Preterito
didn't I cost? didn't you cost? didn't he cost? didn't we cost? didn't you cost? didn't they cost?
Preterite continua
wasn't I costing? weren't you costing? wasn't he costing? weren't we costing? weren't you costing? weren't they costing?
Presente perfetto
haven't I cost? haven't you cost? hasn't he cost? haven't we cost? haven't you cost? haven't they cost?
Presente perfetto continuo
haven't I been costing? haven't you been costing? hasn't he been costing? haven't we been costing? haven't you been costing? haven't they been costing?
Piuccheperfetto
hadn't I cost? hadn't you cost? hadn't he cost? hadn't we cost? hadn't you cost? hadn't they cost?
Piuccheperfetto continuo
hadn't I been costing? hadn't you been costing? hadn't he been costing? hadn't we been costing? hadn't you been costing? hadn't they been costing?
Futuro semplice
won't I cost? won't you cost? won't he cost? won't we cost? won't you cost? won't they cost?
Futuro continuo
won't I be costing? won't you be costing? won't he be costing? won't we be costing? won't you be costing? won't they be costing?
Futuro anteriore
won't I have cost? won't you have cost? won't he have cost? won't we have cost? won't you have cost? won't they have cost?
Futuro anteriore contínuo
won't I have been costing? won't you have been costing? won't he have been costing? won't we have been costing? won't you have been costing? won't they have been costing?
Condizionale
Presente
wouldn't I cost? wouldn't you cost? wouldn't he cost? wouldn't we cost? wouldn't you cost? wouldn't they cost?
Presente continuo
wouldn't I be costing? wouldn't you be costing? wouldn't he be costing? wouldn't we be costing? wouldn't you be costing? wouldn't they be costing?
Passato
wouldn't I have cost? wouldn't you have cost? wouldn't he have cost? wouldn't we have cost? wouldn't you have cost? wouldn't they have cost?
Passato continuo
wouldn't I have been costing? wouldn't you have been costing? wouldn't he have been costing? wouldn't we have been costing? wouldn't you have been costing? wouldn't they have been costing?