could riot
Regular verb: riot - rioted- rioted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could riot
you could riot
he could riot
we could riot
you could riot
they could riot 	I could be rioting
you could be rioting
he could be rioting
we could be rioting
you could be rioting
they could be rioting	I could have rioted
you could have rioted
he could have rioted
we could have rioted
you could have rioted
they could have rioted	I could have been rioting
you could have been rioting
he could have been rioting
we could have been rioting
you could have been rioting
they could have been rioting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't riot
you couldn't riot
he couldn't riot
we couldn't riot
you couldn't riot
they couldn't riot 	I couldn't be rioting
you couldn't be rioting
he couldn't be rioting
we couldn't be rioting
you couldn't be rioting
they couldn't be rioting	I couldn't have rioted
you couldn't have rioted
he couldn't have rioted
we couldn't have rioted
you couldn't have rioted
they couldn't have rioted	I couldn't have been rioting
you couldn't have been rioting
he couldn't have been rioting
we couldn't have been rioting
you couldn't have been rioting
they couldn't have been rioting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I riot?
could you riot?
could he riot?
could we riot?
could you riot?
could they riot? 	could I be rioting?
could you be rioting?
could he be rioting?
could we be rioting?
could you be rioting?
could they be rioting? 	could I have rioted?
could you have rioted?
could he have rioted?
could we have rioted?
could you have rioted?
could they have rioted? 	could I have been rioting?
could you have been rioting?
could he have been rioting?
could we have been rioting?
could you have been rioting?
could they have been rioting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I riot?
couldn't you riot?
couldn't he riot?
couldn't we riot?
couldn't you riot?
couldn't they riot? 	couldn't I be rioting?
couldn't you be rioting?
couldn't he be rioting?
couldn't we be rioting?
couldn't you be rioting?
couldn't they be rioting? 	couldn't I have rioted?
couldn't you have rioted?
couldn't he have rioted?
couldn't we have rioted?
couldn't you have rioted?
couldn't they have rioted? 	couldn't I have been rioting?
couldn't you have been rioting?
couldn't he have been rioting?
couldn't we have been rioting?
couldn't you have been rioting?
couldn't they have been rioting?