English verb conjugation MUST PI

Regular verb: pi - pied - pied

Affirmation

Simple form

I must pi
you must pi
he must pi
we must pi
you must pi
they must pi

V-ing form

I must be piing
you must be piing
he must be piing
we must be piing
you must be piing
they must be piing

Perfect

I must have pied
you must have pied
he must have pied
we must have pied
you must have pied
they must have pied

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I pi?
must you pi?
must he pi?
must we pi?
must you pi?
must they pi?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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