English verb conjugation MUST STAFF

Regular verb: staff - staffed - staffed

Affirmation

Simple form

I must staff
you must staff
she must staff
we must staff
you must staff
they must staff

V-ing form

I must be staffing
you must be staffing
she must be staffing
we must be staffing
you must be staffing
they must be staffing

Perfect

I must have staffed
you must have staffed
she 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
she 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
she 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
she 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
she 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
she 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 she staff?
must we staff?
must you staff?
must they staff?

V-ing form

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

Perfect

must I have staffed?
must you have staffed?
must she 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 she 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 she 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 she 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 she 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 she 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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