I can base you can base she can base we can base you can base they can base
Forma com V-ing
I can be basing you can be basing she can be basing we can be basing you can be basing they can be basing
Perfeito
I can have based you can have based she can have based we can have based you can have based they can have based
Perfeito com V-ing
I can have been basing you can have been basing she can have been basing we can have been basing you can have been basing they can have been basing
Negação
Forma simple
I can't base you can't base she can't base we can't base you can't base they can't base
Forma com V-ing
I can't be basing you can't be basing she can't be basing we can't be basing you can't be basing they can't be basing
Perfeito
I can't have based you can't have based she can't have based we can't have based you can't have based they can't have based
Perfeito com V-ing
I can't have been basing you can't have been basing she can't have been basing we can't have been basing you can't have been basing they can't have been basing
Forma interrogativa
Forma simple
can I base? can you base? can she base? can we base? can you base? can they base?
Forma com V-ing
can I be basing? can you be basing? can she be basing? can we be basing? can you be basing? can they be basing?
Perfeito
can I have based? can you have based? can she have based? can we have based? can you have based? can they have based?
Perfeito com V-ing
can I have been basing? can you have been basing? can she have been basing? can we have been basing? can you have been basing? can they have been basing?
Forma interro-Negação
Forma simple
can't I base? can't you base? can't she base? can't we base? can't you base? can't they base?
Forma com V-ing
can't I be basing? can't you be basing? can't she be basing? can't we be basing? can't you be basing? can't they be basing?
Perfeito
can't I have based? can't you have based? can't she have based? can't we have based? can't you have based? can't they have based?
Perfeito com V-ing
can't I have been basing? can't you have been basing? can't she have been basing? can't we have been basing? can't you have been basing? can't they have been basing?