I can sift you can sift she can sift we can sift you can sift they can sift
Forma com V-ing
I can be sifting you can be sifting she can be sifting we can be sifting you can be sifting they can be sifting
Perfeito
I can have sifted you can have sifted she can have sifted we can have sifted you can have sifted they can have sifted
Perfeito com V-ing
I can have been sifting you can have been sifting she can have been sifting we can have been sifting you can have been sifting they can have been sifting
Negação
Forma simple
I cannot sift you cannot sift she cannot sift we cannot sift you cannot sift they cannot sift
Forma com V-ing
I cannot be sifting you cannot be sifting she cannot be sifting we cannot be sifting you cannot be sifting they cannot be sifting
Perfeito
I cannot have sifted you cannot have sifted she cannot have sifted we cannot have sifted you cannot have sifted they cannot have sifted
Perfeito com V-ing
I cannot have been sifting you cannot have been sifting she cannot have been sifting we cannot have been sifting you cannot have been sifting they cannot have been sifting
Forma interrogativa
Forma simple
can I sift? can you sift? can she sift? can we sift? can you sift? can they sift?
Forma com V-ing
can I be sifting? can you be sifting? can she be sifting? can we be sifting? can you be sifting? can they be sifting?
Perfeito
can I have sifted? can you have sifted? can she have sifted? can we have sifted? can you have sifted? can they have sifted?
Perfeito com V-ing
can I have been sifting? can you have been sifting? can she have been sifting? can we have been sifting? can you have been sifting? can they have been sifting?
Forma interro-Negação
Forma simple
can I not sift? can you not sift? can she not sift? can we not sift? can you not sift? can they not sift?
Forma com V-ing
can I not be sifting? can you not be sifting? can she not be sifting? can we not be sifting? can you not be sifting? can they not be sifting?
Perfeito
can I not have sifted? can you not have sifted? can she not have sifted? can we not have sifted? can you not have sifted? can they not have sifted?
Perfeito com V-ing
can I not have been sifting? can you not have been sifting? can she not have been sifting? can we not have been sifting? can you not have been sifting? can they not have been sifting?