could sift
Verbe régulier : sift - sifted- sifted
Traduction française : tamiser - fouiller 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could sift
you could sift
she could sift
we could sift
you could sift
they could sift 	I could be sifting
you could be sifting
she could be sifting
we could be sifting
you could be sifting
they could be sifting	I could have sifted
you could have sifted
she could have sifted
we could have sifted
you could have sifted
they could have sifted	I could have been sifting
you could have been sifting
she could have been sifting
we could have been sifting
you could have been sifting
they could have been sifting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not sift
you could not sift
she could not sift
we could not sift
you could not sift
they could not sift 	I could not be sifting
you could not be sifting
she could not be sifting
we could not be sifting
you could not be sifting
they could not be sifting	I could not have sifted
you could not have sifted
she could not have sifted
we could not have sifted
you could not have sifted
they could not have sifted	I could not have been sifting
you could not have been sifting
she could not have been sifting
we could not have been sifting
you could not have been sifting
they could not have been sifting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I sift?
could you sift?
could she sift?
could we sift?
could you sift?
could they sift? 	could I be sifting?
could you be sifting?
could she be sifting?
could we be sifting?
could you be sifting?
could they be sifting? 	could I have sifted?
could you have sifted?
could she have sifted?
could we have sifted?
could you have sifted?
could they have sifted? 	could I have been sifting?
could you have been sifting?
could she have been sifting?
could we have been sifting?
could you have been sifting?
could they have been sifting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not sift?
could you not sift?
could she not sift?
could we not sift?
could you not sift?
could they not sift? 	could I not be sifting?
could you not be sifting?
could she not be sifting?
could we not be sifting?
could you not be sifting?
could they not be sifting? 	could I not have sifted?
could you not have sifted?
could she not have sifted?
could we not have sifted?
could you not have sifted?
could they not have sifted? 	could I not have been sifting?
could you not have been sifting?
could she not have been sifting?
could we not have been sifting?
could you not have been sifting?
could they not have been sifting?