English verb conjugation COULD SIRE

Regular verb: sire - sired - sired

Affirmation

Simple form

I could sire
you could sire
he could sire
we could sire
you could sire
they could sire

V-ing form

I could be siring
you could be siring
he could be siring
we could be siring
you could be siring
they could be siring

Perfect

I could have sired
you could have sired
he could have sired
we could have sired
you could have sired
they could have sired

V-ing perfect

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

Negation

Simple form

I could not sire
you could not sire
he could not sire
we could not sire
you could not sire
they could not sire

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I sire?
could you sire?
could he sire?
could we sire?
could you sire?
could they sire?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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