English verb conjugation MUST UNDERGIRD

Irregular verb: undergird - undergirt, undergirded - undergirt, undergirded

Affirmation

Simple form

I must undergird
you must undergird
he must undergird
we must undergird
you must undergird
they must undergird

V-ing form

I must be undergirding
you must be undergirding
he must be undergirding
we must be undergirding
you must be undergirding
they must be undergirding

Perfect

I must have undergirt, undergirded
you must have undergirt, undergirded
he must have undergirt, undergirded
we must have undergirt, undergirded
you must have undergirt, undergirded
they must have undergirt, undergirded

V-ing perfect

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

Negation

Simple form

I mustn't undergird
you mustn't undergird
he mustn't undergird
we mustn't undergird
you mustn't undergird
they mustn't undergird

V-ing form

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

Perfect

I mustn't have undergirt, undergirded
you mustn't have undergirt, undergirded
he mustn't have undergirt, undergirded
we mustn't have undergirt, undergirded
you mustn't have undergirt, undergirded
they mustn't have undergirt, undergirded

V-ing perfect

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

Interrogative form

Simple form

must I undergird?
must you undergird?
must he undergird?
must we undergird?
must you undergird?
must they undergird?

V-ing form

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

Perfect

must I have undergirt, undergirded?
must you have undergirt, undergirded?
must he have undergirt, undergirded?
must we have undergirt, undergirded?
must you have undergirt, undergirded?
must they have undergirt, undergirded?

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

mustn't I have undergirt, undergirded?
mustn't you have undergirt, undergirded?
mustn't he have undergirt, undergirded?
mustn't we have undergirt, undergirded?
mustn't you have undergirt, undergirded?
mustn't they have undergirt, undergirded?

V-ing perfect

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

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