I could cost you could cost he could cost we could cost you could cost they could cost
Forma con V-ing
I could be costing you could be costing he could be costing we could be costing you could be costing they could be costing
Perfecto
I could have cost you could have cost he could have cost we could have cost you could have cost they could have cost
Perfecto con V-ing
I could have been costing you could have been costing he could have been costing we could have been costing you could have been costing they could have been costing
Negación
Forma simple
I couldn't cost you couldn't cost he couldn't cost we couldn't cost you couldn't cost they couldn't cost
Forma con V-ing
I couldn't be costing you couldn't be costing he couldn't be costing we couldn't be costing you couldn't be costing they couldn't be costing
Perfecto
I couldn't have cost you couldn't have cost he couldn't have cost we couldn't have cost you couldn't have cost they couldn't have cost
Perfecto con V-ing
I couldn't have been costing you couldn't have been costing he couldn't have been costing we couldn't have been costing you couldn't have been costing they couldn't have been costing
Forma interrogativa
Forma simple
could I cost? could you cost? could he cost? could we cost? could you cost? could they cost?
Forma con V-ing
could I be costing? could you be costing? could he be costing? could we be costing? could you be costing? could they be costing?
Perfecto
could I have cost? could you have cost? could he have cost? could we have cost? could you have cost? could they have cost?
Perfecto con V-ing
could I have been costing? could you have been costing? could he have been costing? could we have been costing? could you have been costing? could they have been costing?
Forma interro-negativa
Forma simple
couldn't I cost? couldn't you cost? couldn't he cost? couldn't we cost? couldn't you cost? couldn't they cost?
Forma con V-ing
couldn't I be costing? couldn't you be costing? couldn't he be costing? couldn't we be costing? couldn't you be costing? couldn't they be costing?
Perfecto
couldn't I have cost? couldn't you have cost? couldn't he have cost? couldn't we have cost? couldn't you have cost? couldn't they have cost?
Perfecto con V-ing
couldn't I have been costing? couldn't you have been costing? couldn't he have been costing? couldn't we have been costing? couldn't you have been costing? couldn't they have been costing?