I can cost you can cost he can cost we can cost you can cost they can cost
Forma com V-ing
I can be costing you can be costing he can be costing we can be costing you can be costing they can be costing
Perfeito
I can have cost you can have cost he can have cost we can have cost you can have cost they can have cost
Perfeito com V-ing
I can have been costing you can have been costing he can have been costing we can have been costing you can have been costing they can have been costing
Negação
Forma simple
I cannot cost you cannot cost he cannot cost we cannot cost you cannot cost they cannot cost
Forma com V-ing
I cannot be costing you cannot be costing he cannot be costing we cannot be costing you cannot be costing they cannot be costing
Perfeito
I cannot have cost you cannot have cost he cannot have cost we cannot have cost you cannot have cost they cannot have cost
Perfeito com V-ing
I cannot have been costing you cannot have been costing he cannot have been costing we cannot have been costing you cannot have been costing they cannot have been costing
Forma interrogativa
Forma simple
can I cost? can you cost? can he cost? can we cost? can you cost? can they cost?
Forma com V-ing
can I be costing? can you be costing? can he be costing? can we be costing? can you be costing? can they be costing?
Perfeito
can I have cost? can you have cost? can he have cost? can we have cost? can you have cost? can they have cost?
Perfeito com V-ing
can I have been costing? can you have been costing? can he have been costing? can we have been costing? can you have been costing? can they have been costing?
Forma interro-Negação
Forma simple
can I not cost? can you not cost? can he not cost? can we not cost? can you not cost? can they not cost?
Forma com V-ing
can I not be costing? can you not be costing? can he not be costing? can we not be costing? can you not be costing? can they not be costing?
Perfeito
can I not have cost? can you not have cost? can he not have cost? can we not have cost? can you not have cost? can they not have cost?
Perfeito com V-ing
can I not have been costing? can you not have been costing? can he not have been costing? can we not have been costing? can you not have been costing? can they not have been costing?