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 mustn't sire
you mustn't sire
he mustn't sire
we mustn't sire
you mustn't sire
they mustn't sire

V-ing form

I mustn't be siring
you mustn't be siring
he mustn't be siring
we mustn't be siring
you mustn't be siring
they mustn't be siring

Perfect

I mustn't have sired
you mustn't have sired
he mustn't have sired
we mustn't have sired
you mustn't have sired
they mustn't have sired

V-ing perfect

I mustn't have been siring
you mustn't have been siring
he mustn't have been siring
we mustn't have been siring
you mustn't have been siring
they mustn't 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

mustn't I sire?
mustn't you sire?
mustn't he sire?
mustn't we sire?
mustn't you sire?
mustn't they sire?

V-ing form

mustn't I be siring?
mustn't you be siring?
mustn't he be siring?
mustn't we be siring?
mustn't you be siring?
mustn't they be siring?

Perfect

mustn't I have sired?
mustn't you have sired?
mustn't he have sired?
mustn't we have sired?
mustn't you have sired?
mustn't they have sired?

V-ing perfect

mustn't I have been siring?
mustn't you have been siring?
mustn't he have been siring?
mustn't we have been siring?
mustn't you have been siring?
mustn't they have been siring?

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