English verb conjugation MUST UPSPRING

Irregular verb: upspring - upsprang, upsprung - upsprung

Affirmation

Simple form

I must upspring
you must upspring
she must upspring
we must upspring
you must upspring
they must upspring

V-ing form

I must be upspringing
you must be upspringing
she must be upspringing
we must be upspringing
you must be upspringing
they must be upspringing

Perfect

I must have upsprung
you must have upsprung
she must have upsprung
we must have upsprung
you must have upsprung
they must have upsprung

V-ing perfect

I must have been upspringing
you must have been upspringing
she must have been upspringing
we must have been upspringing
you must have been upspringing
they must have been upspringing

Negation

Simple form

I mustn't upspring
you mustn't upspring
she mustn't upspring
we mustn't upspring
you mustn't upspring
they mustn't upspring

V-ing form

I mustn't be upspringing
you mustn't be upspringing
she mustn't be upspringing
we mustn't be upspringing
you mustn't be upspringing
they mustn't be upspringing

Perfect

I mustn't have upsprung
you mustn't have upsprung
she mustn't have upsprung
we mustn't have upsprung
you mustn't have upsprung
they mustn't have upsprung

V-ing perfect

I mustn't have been upspringing
you mustn't have been upspringing
she mustn't have been upspringing
we mustn't have been upspringing
you mustn't have been upspringing
they mustn't have been upspringing

Interrogative form

Simple form

must I upspring?
must you upspring?
must she upspring?
must we upspring?
must you upspring?
must they upspring?

V-ing form

must I be upspringing?
must you be upspringing?
must she be upspringing?
must we be upspringing?
must you be upspringing?
must they be upspringing?

Perfect

must I have upsprung?
must you have upsprung?
must she have upsprung?
must we have upsprung?
must you have upsprung?
must they have upsprung?

V-ing perfect

must I have been upspringing?
must you have been upspringing?
must she have been upspringing?
must we have been upspringing?
must you have been upspringing?
must they have been upspringing?

Interro-negative form

Simple form

mustn't I upspring?
mustn't you upspring?
mustn't she upspring?
mustn't we upspring?
mustn't you upspring?
mustn't they upspring?

V-ing form

mustn't I be upspringing?
mustn't you be upspringing?
mustn't she be upspringing?
mustn't we be upspringing?
mustn't you be upspringing?
mustn't they be upspringing?

Perfect

mustn't I have upsprung?
mustn't you have upsprung?
mustn't she have upsprung?
mustn't we have upsprung?
mustn't you have upsprung?
mustn't they have upsprung?

V-ing perfect

mustn't I have been upspringing?
mustn't you have been upspringing?
mustn't she have been upspringing?
mustn't we have been upspringing?
mustn't you have been upspringing?
mustn't they have been upspringing?

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