could ferule
Regular verb: ferule - feruled- feruled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could ferule
you could ferule
she could ferule
we could ferule
you could ferule
they could ferule 	I could be feruling
you could be feruling
she could be feruling
we could be feruling
you could be feruling
they could be feruling	I could have feruled
you could have feruled
she could have feruled
we could have feruled
you could have feruled
they could have feruled	I could have been feruling
you could have been feruling
she could have been feruling
we could have been feruling
you could have been feruling
they could have been feruling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not ferule
you could not ferule
she could not ferule
we could not ferule
you could not ferule
they could not ferule 	I could not be feruling
you could not be feruling
she could not be feruling
we could not be feruling
you could not be feruling
they could not be feruling	I could not have feruled
you could not have feruled
she could not have feruled
we could not have feruled
you could not have feruled
they could not have feruled	I could not have been feruling
you could not have been feruling
she could not have been feruling
we could not have been feruling
you could not have been feruling
they could not have been feruling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I ferule?
could you ferule?
could she ferule?
could we ferule?
could you ferule?
could they ferule? 	could I be feruling?
could you be feruling?
could she be feruling?
could we be feruling?
could you be feruling?
could they be feruling? 	could I have feruled?
could you have feruled?
could she have feruled?
could we have feruled?
could you have feruled?
could they have feruled? 	could I have been feruling?
could you have been feruling?
could she have been feruling?
could we have been feruling?
could you have been feruling?
could they have been feruling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not ferule?
could you not ferule?
could she not ferule?
could we not ferule?
could you not ferule?
could they not ferule? 	could I not be feruling?
could you not be feruling?
could she not be feruling?
could we not be feruling?
could you not be feruling?
could they not be feruling? 	could I not have feruled?
could you not have feruled?
could she not have feruled?
could we not have feruled?
could you not have feruled?
could they not have feruled? 	could I not have been feruling?
could you not have been feruling?
could she not have been feruling?
could we not have been feruling?
could you not have been feruling?
could they not have been feruling?