English verb conjugation MUST UNDERGIRD

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

Affirmation

Simple form

I must undergird
you must undergird
she must undergird
we must undergird
you must undergird
they must undergird

V-ing form

I must be undergirding
you must be undergirding
she 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
she 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
she 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
she 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
she 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
she 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
she 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 she undergird?
must we undergird?
must you undergird?
must they undergird?

V-ing form

must I be undergirding?
must you be undergirding?
must she 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 she 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 she 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 she 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 she 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 she 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 she 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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