English verb conjugation
MUST ROLF

Regular verb: rolf - rolfed - rolfed

Affirmation

Simple form	V-ing form
I must rolf you must rolf she must rolf we must rolf you must rolf they must rolf	I must be rolfing you must be rolfing she must be rolfing we must be rolfing you must be rolfing they must be rolfing
Perfect	V-ing perfect
I must have rolfed you must have rolfed she must have rolfed we must have rolfed you must have rolfed they must have rolfed	I must have been rolfing you must have been rolfing she must have been rolfing we must have been rolfing you must have been rolfing they must have been rolfing

Negation

Simple form	V-ing form
I mustn't rolf you mustn't rolf she mustn't rolf we mustn't rolf you mustn't rolf they mustn't rolf	I mustn't be rolfing you mustn't be rolfing she mustn't be rolfing we mustn't be rolfing you mustn't be rolfing they mustn't be rolfing
Perfect	V-ing perfect
I mustn't have rolfed you mustn't have rolfed she mustn't have rolfed we mustn't have rolfed you mustn't have rolfed they mustn't have rolfed	I mustn't have been rolfing you mustn't have been rolfing she mustn't have been rolfing we mustn't have been rolfing you mustn't have been rolfing they mustn't have been rolfing

Interrogative form

Simple form	V-ing form
must I rolf? must you rolf? must she rolf? must we rolf? must you rolf? must they rolf?	must I be rolfing? must you be rolfing? must she be rolfing? must we be rolfing? must you be rolfing? must they be rolfing?
Perfect	V-ing perfect
must I have rolfed? must you have rolfed? must she have rolfed? must we have rolfed? must you have rolfed? must they have rolfed?	must I have been rolfing? must you have been rolfing? must she have been rolfing? must we have been rolfing? must you have been rolfing? must they have been rolfing?

Interro-negative form

Simple form	V-ing form
mustn't I rolf? mustn't you rolf? mustn't she rolf? mustn't we rolf? mustn't you rolf? mustn't they rolf?	mustn't I be rolfing? mustn't you be rolfing? mustn't she be rolfing? mustn't we be rolfing? mustn't you be rolfing? mustn't they be rolfing?
Perfect	V-ing perfect
mustn't I have rolfed? mustn't you have rolfed? mustn't she have rolfed? mustn't we have rolfed? mustn't you have rolfed? mustn't they have rolfed?	mustn't I have been rolfing? mustn't you have been rolfing? mustn't she have been rolfing? mustn't we have been rolfing? mustn't you have been rolfing? mustn't they have been rolfing?