could madden
Regular verb: madden - maddened- maddened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could madden
you could madden
she could madden
we could madden
you could madden
they could madden 	I could be maddening
you could be maddening
she could be maddening
we could be maddening
you could be maddening
they could be maddening	I could have maddened
you could have maddened
she could have maddened
we could have maddened
you could have maddened
they could have maddened	I could have been maddening
you could have been maddening
she could have been maddening
we could have been maddening
you could have been maddening
they could have been maddening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not madden
you could not madden
she could not madden
we could not madden
you could not madden
they could not madden 	I could not be maddening
you could not be maddening
she could not be maddening
we could not be maddening
you could not be maddening
they could not be maddening	I could not have maddened
you could not have maddened
she could not have maddened
we could not have maddened
you could not have maddened
they could not have maddened	I could not have been maddening
you could not have been maddening
she could not have been maddening
we could not have been maddening
you could not have been maddening
they could not have been maddening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I madden?
could you madden?
could she madden?
could we madden?
could you madden?
could they madden? 	could I be maddening?
could you be maddening?
could she be maddening?
could we be maddening?
could you be maddening?
could they be maddening? 	could I have maddened?
could you have maddened?
could she have maddened?
could we have maddened?
could you have maddened?
could they have maddened? 	could I have been maddening?
could you have been maddening?
could she have been maddening?
could we have been maddening?
could you have been maddening?
could they have been maddening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not madden?
could you not madden?
could she not madden?
could we not madden?
could you not madden?
could they not madden? 	could I not be maddening?
could you not be maddening?
could she not be maddening?
could we not be maddening?
could you not be maddening?
could they not be maddening? 	could I not have maddened?
could you not have maddened?
could she not have maddened?
could we not have maddened?
could you not have maddened?
could they not have maddened? 	could I not have been maddening?
could you not have been maddening?
could she not have been maddening?
could we not have been maddening?
could you not have been maddening?
could they not have been maddening?