English verb conjugation MUST QUAFF

Regular verb: quaff - quaffed - quaffed

Affirmation

Simple form

I must quaff
you must quaff
he must quaff
we must quaff
you must quaff
they must quaff

V-ing form

I must be quaffing
you must be quaffing
he must be quaffing
we must be quaffing
you must be quaffing
they must be quaffing

Perfect

I must have quaffed
you must have quaffed
he must have quaffed
we must have quaffed
you must have quaffed
they must have quaffed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I quaff?
must you quaff?
must he quaff?
must we quaff?
must you quaff?
must they quaff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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