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 cannot roister you cannot roister he cannot roister we cannot roister you cannot roister they cannot roister	I cannot be roistering you cannot be roistering he cannot be roistering we cannot be roistering you cannot be roistering they cannot be roistering
Perfect	V-ing perfect
I cannot have roistered you cannot have roistered he cannot have roistered we cannot have roistered you cannot have roistered they cannot have roistered	I cannot have been roistering you cannot have been roistering he cannot have been roistering we cannot have been roistering you cannot have been roistering they cannot 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 I not roister? can you not roister? can he not roister? can we not roister? can you not roister? can they not roister?	can I not be roistering? can you not be roistering? can he not be roistering? can we not be roistering? can you not be roistering? can they not be roistering?
Perfect	V-ing perfect
can I not have roistered? can you not have roistered? can he not have roistered? can we not have roistered? can you not have roistered? can they not have roistered?	can I not have been roistering? can you not have been roistering? can he not have been roistering? can we not have been roistering? can you not have been roistering? can they not have been roistering?