English verb conjugation COULD SIUM

Regular verb: sium - siumed - siumed

Affirmation

Simple form

I could sium
you could sium
he could sium
we could sium
you could sium
they could sium

V-ing form

I could be siuming
you could be siuming
he could be siuming
we could be siuming
you could be siuming
they could be siuming

Perfect

I could have siumed
you could have siumed
he could have siumed
we could have siumed
you could have siumed
they could have siumed

V-ing perfect

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

Negation

Simple form

I could not sium
you could not sium
he could not sium
we could not sium
you could not sium
they could not sium

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I sium?
could you sium?
could he sium?
could we sium?
could you sium?
could they sium?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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