English verb conjugation COULD SIFT

Regular verb: sift - sifted - sifted

Affirmation

Simple form

I could sift
you could sift
he could sift
we could sift
you could sift
they could sift

V-ing form

I could be sifting
you could be sifting
he could be sifting
we could be sifting
you could be sifting
they could be sifting

Perfect

I could have sifted
you could have sifted
he could have sifted
we could have sifted
you could have sifted
they could have sifted

V-ing perfect

I could have been sifting
you could have been sifting
he could have been sifting
we could have been sifting
you could have been sifting
they could have been sifting

Negation

Simple form

I could not sift
you could not sift
he could not sift
we could not sift
you could not sift
they could not sift

V-ing form

I could not be sifting
you could not be sifting
he could not be sifting
we could not be sifting
you could not be sifting
they could not be sifting

Perfect

I could not have sifted
you could not have sifted
he could not have sifted
we could not have sifted
you could not have sifted
they could not have sifted

V-ing perfect

I could not have been sifting
you could not have been sifting
he could not have been sifting
we could not have been sifting
you could not have been sifting
they could not have been sifting

Interrogative form

Simple form

could I sift?
could you sift?
could he sift?
could we sift?
could you sift?
could they sift?

V-ing form

could I be sifting?
could you be sifting?
could he be sifting?
could we be sifting?
could you be sifting?
could they be sifting?

Perfect

could I have sifted?
could you have sifted?
could he have sifted?
could we have sifted?
could you have sifted?
could they have sifted?

V-ing perfect

could I have been sifting?
could you have been sifting?
could he have been sifting?
could we have been sifting?
could you have been sifting?
could they have been sifting?

Interro-negative form

Simple form

could I not sift?
could you not sift?
could he not sift?
could we not sift?
could you not sift?
could they not sift?

V-ing form

could I not be sifting?
could you not be sifting?
could he not be sifting?
could we not be sifting?
could you not be sifting?
could they not be sifting?

Perfect

could I not have sifted?
could you not have sifted?
could he not have sifted?
could we not have sifted?
could you not have sifted?
could they not have sifted?

V-ing perfect

could I not have been sifting?
could you not have been sifting?
could he not have been sifting?
could we not have been sifting?
could you not have been sifting?
could they not have been sifting?

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