can sift
Verbo regular: sift - sifted- sifted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can sift
you can sift
she can sift
we can sift
you can sift
they can sift 	I can be sifting
you can be sifting
she can be sifting
we can be sifting
you can be sifting
they can be sifting	I can have sifted
you can have sifted
she can have sifted
we can have sifted
you can have sifted
they can have sifted	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot sift
you cannot sift
she cannot sift
we cannot sift
you cannot sift
they cannot sift 	I cannot be sifting
you cannot be sifting
she cannot be sifting
we cannot be sifting
you cannot be sifting
they cannot be sifting	I cannot have sifted
you cannot have sifted
she cannot have sifted
we cannot have sifted
you cannot have sifted
they cannot have sifted	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 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I sift?
can you sift?
can she sift?
can we sift?
can you sift?
can they sift? 	can I be sifting?
can you be sifting?
can she be sifting?
can we be sifting?
can you be sifting?
can they be sifting? 	can I have sifted?
can you have sifted?
can she have sifted?
can we have sifted?
can you have sifted?
can they have sifted? 	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-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not sift?
can you not sift?
can she not sift?
can we not sift?
can you not sift?
can they not sift? 	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? 	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? 	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?