English verb conjugation MUST STAFF

Regular verb: staff - staffed - staffed

Affirmation

Simple form

I must staff
you must staff
he must staff
we must staff
you must staff
they must staff

V-ing form

I must be staffing
you must be staffing
he must be staffing
we must be staffing
you must be staffing
they must be staffing

Perfect

I must have staffed
you must have staffed
he must have staffed
we must have staffed
you must have staffed
they must have staffed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I staff?
must you staff?
must he staff?
must we staff?
must you staff?
must they staff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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