English verb conjugation MUST FROWN

Regular verb: frown - frowned - frowned

Affirmation

Simple form

I must frown
you must frown
he must frown
we must frown
you must frown
they must frown

V-ing form

I must be frowning
you must be frowning
he must be frowning
we must be frowning
you must be frowning
they must be frowning

Perfect

I must have frowned
you must have frowned
he must have frowned
we must have frowned
you must have frowned
they must have frowned

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I frown?
must you frown?
must he frown?
must we frown?
must you frown?
must they frown?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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