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