I can doubt you can doubt she can doubt we can doubt you can doubt they can doubt
Forma com V-ing
I can be doubting you can be doubting she can be doubting we can be doubting you can be doubting they can be doubting
Perfeito
I can have doubted you can have doubted she can have doubted we can have doubted you can have doubted they can have doubted
Perfeito com V-ing
I can have been doubting you can have been doubting she can have been doubting we can have been doubting you can have been doubting they can have been doubting
Negação
Forma simple
I cannot doubt you cannot doubt she cannot doubt we cannot doubt you cannot doubt they cannot doubt
Forma com V-ing
I cannot be doubting you cannot be doubting she cannot be doubting we cannot be doubting you cannot be doubting they cannot be doubting
Perfeito
I cannot have doubted you cannot have doubted she cannot have doubted we cannot have doubted you cannot have doubted they cannot have doubted
Perfeito com V-ing
I cannot have been doubting you cannot have been doubting she cannot have been doubting we cannot have been doubting you cannot have been doubting they cannot have been doubting
Forma interrogativa
Forma simple
can I doubt? can you doubt? can she doubt? can we doubt? can you doubt? can they doubt?
Forma com V-ing
can I be doubting? can you be doubting? can she be doubting? can we be doubting? can you be doubting? can they be doubting?
Perfeito
can I have doubted? can you have doubted? can she have doubted? can we have doubted? can you have doubted? can they have doubted?
Perfeito com V-ing
can I have been doubting? can you have been doubting? can she have been doubting? can we have been doubting? can you have been doubting? can they have been doubting?
Forma interro-Negação
Forma simple
can I not doubt? can you not doubt? can she not doubt? can we not doubt? can you not doubt? can they not doubt?
Forma com V-ing
can I not be doubting? can you not be doubting? can she not be doubting? can we not be doubting? can you not be doubting? can they not be doubting?
Perfeito
can I not have doubted? can you not have doubted? can she not have doubted? can we not have doubted? can you not have doubted? can they not have doubted?
Perfeito com V-ing
can I not have been doubting? can you not have been doubting? can she not have been doubting? can we not have been doubting? can you not have been doubting? can they not have been doubting?