can roister
Verbe régulier : roister - roistered- roistered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can roister
you can roister
she can roister
we can roister
you can roister
they can roister 	I can be roistering
you can be roistering
she can be roistering
we can be roistering
you can be roistering
they can be roistering	I can have roistered
you can have roistered
she 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
she can have been roistering
we can have been roistering
you can have been roistering
they can have been roistering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I cannot roister
you cannot roister
she cannot roister
we cannot roister
you cannot roister
they cannot roister 	I cannot be roistering
you cannot be roistering
she cannot be roistering
we cannot be roistering
you cannot be roistering
they cannot be roistering	I cannot have roistered
you cannot have roistered
she 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
she cannot have been roistering
we cannot have been roistering
you cannot have been roistering
they cannot have been roistering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I roister?
can you roister?
can she roister?
can we roister?
can you roister?
can they roister? 	can I be roistering?
can you be roistering?
can she be roistering?
can we be roistering?
can you be roistering?
can they be roistering? 	can I have roistered?
can you have roistered?
can she 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 she have been roistering?
can we have been roistering?
can you have been roistering?
can they have been roistering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I not roister?
can you not roister?
can she 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 she not be roistering?
can we not be roistering?
can you not be roistering?
can they not be roistering? 	can I not have roistered?
can you not have roistered?
can she 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 she not have been roistering?
can we not have been roistering?
can you not have been roistering?
can they not have been roistering?