English verb conjugation
MUST STAFF

Regular verb: staff - staffed - staffed

Affirmation

Simple form	V-ing form
I must staff you must staff she must staff we must staff you must staff they must staff	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
must I staff? must you staff? must she staff? must we staff? must you staff? must they staff?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?