English verb conjugation
CAN ROISTER

Regular verb: roister - roistered - roistered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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