English verb conjugation MUST DUN

Regular verb: dun - dunned - dunned

Affirmation

Simple form

I must dun
you must dun
he must dun
we must dun
you must dun
they must dun

V-ing form

I must be dunning
you must be dunning
he must be dunning
we must be dunning
you must be dunning
they must be dunning

Perfect

I must have dunned
you must have dunned
he must have dunned
we must have dunned
you must have dunned
they must have dunned

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I dun?
must you dun?
must he dun?
must we dun?
must you dun?
must they dun?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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