English verb conjugation
MUST ROISTER

Regular verb: roister - roistered - roistered

Affirmation

Simple form	V-ing form
I must roister you must roister she must roister we must roister you must roister they must roister	I must be roistering you must be roistering she must be roistering we must be roistering you must be roistering they must be roistering
Perfect	V-ing perfect
I must have roistered you must have roistered she must have roistered we must have roistered you must have roistered they must have roistered	I must have been roistering you must have been roistering she must have been roistering we must have been roistering you must have been roistering they must have been roistering

Negation

Simple form	V-ing form
I mustn't roister you mustn't roister she mustn't roister we mustn't roister you mustn't roister they mustn't roister	I mustn't be roistering you mustn't be roistering she mustn't be roistering we mustn't be roistering you mustn't be roistering they mustn't be roistering
Perfect	V-ing perfect
I mustn't have roistered you mustn't have roistered she mustn't have roistered we mustn't have roistered you mustn't have roistered they mustn't have roistered	I mustn't have been roistering you mustn't have been roistering she mustn't have been roistering we mustn't have been roistering you mustn't have been roistering they mustn't have been roistering

Interrogative form

Simple form	V-ing form
must I roister? must you roister? must she roister? must we roister? must you roister? must they roister?	must I be roistering? must you be roistering? must she be roistering? must we be roistering? must you be roistering? must they be roistering?
Perfect	V-ing perfect
must I have roistered? must you have roistered? must she have roistered? must we have roistered? must you have roistered? must they have roistered?	must I have been roistering? must you have been roistering? must she have been roistering? must we have been roistering? must you have been roistering? must they have been roistering?

Interro-negative form

Simple form	V-ing form
mustn't I roister? mustn't you roister? mustn't she roister? mustn't we roister? mustn't you roister? mustn't they roister?	mustn't I be roistering? mustn't you be roistering? mustn't she be roistering? mustn't we be roistering? mustn't you be roistering? mustn't they be roistering?
Perfect	V-ing perfect
mustn't I have roistered? mustn't you have roistered? mustn't she have roistered? mustn't we have roistered? mustn't you have roistered? mustn't they have roistered?	mustn't I have been roistering? mustn't you have been roistering? mustn't she have been roistering? mustn't we have been roistering? mustn't you have been roistering? mustn't they have been roistering?