English verb conjugation COULD SIRE

Regular verb: sire - sired - sired

Affirmation

Simple form

I could sire
you could sire
she could sire
we could sire
you could sire
they could sire

V-ing form

I could be siring
you could be siring
she could be siring
we could be siring
you could be siring
they could be siring

Perfect

I could have sired
you could have sired
she 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
she could have been siring
we could have been siring
you could have been siring
they could have been siring

Negation

Simple form

I couldn't sire
you couldn't sire
she couldn't sire
we couldn't sire
you couldn't sire
they couldn't sire

V-ing form

I couldn't be siring
you couldn't be siring
she couldn't be siring
we couldn't be siring
you couldn't be siring
they couldn't be siring

Perfect

I couldn't have sired
you couldn't have sired
she couldn't have sired
we couldn't have sired
you couldn't have sired
they couldn't have sired

V-ing perfect

I couldn't have been siring
you couldn't have been siring
she couldn't have been siring
we couldn't have been siring
you couldn't have been siring
they couldn't have been siring

Interrogative form

Simple form

could I sire?
could you sire?
could she sire?
could we sire?
could you sire?
could they sire?

V-ing form

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

Perfect

could I have sired?
could you have sired?
could she 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 she have been siring?
could we have been siring?
could you have been siring?
could they have been siring?

Interro-negative form

Simple form

couldn't I sire?
couldn't you sire?
couldn't she sire?
couldn't we sire?
couldn't you sire?
couldn't they sire?

V-ing form

couldn't I be siring?
couldn't you be siring?
couldn't she be siring?
couldn't we be siring?
couldn't you be siring?
couldn't they be siring?

Perfect

couldn't I have sired?
couldn't you have sired?
couldn't she have sired?
couldn't we have sired?
couldn't you have sired?
couldn't they have sired?

V-ing perfect

couldn't I have been siring?
couldn't you have been siring?
couldn't she have been siring?
couldn't we have been siring?
couldn't you have been siring?
couldn't they have been siring?

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