English verb conjugation MUST SIRE

Regular verb: sire - sired - sired

Affirmation

Simple form

I must sire
you must sire
he must sire
we must sire
you must sire
they must sire

V-ing form

I must be siring
you must be siring
he must be siring
we must be siring
you must be siring
they must be siring

Perfect

I must have sired
you must have sired
he must have sired
we must have sired
you must have sired
they must have sired

V-ing perfect

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

Negation

Simple form

I must not sire
you must not sire
he must not sire
we must not sire
you must not sire
they must not sire

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I sire?
must you sire?
must he sire?
must we sire?
must you sire?
must they sire?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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