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 couldn't madden
you couldn't madden
she couldn't madden
we couldn't madden
you couldn't madden
they couldn't madden 	I couldn't be maddening
you couldn't be maddening
she couldn't be maddening
we couldn't be maddening
you couldn't be maddening
they couldn't be maddening	I couldn't have maddened
you couldn't have maddened
she couldn't have maddened
we couldn't have maddened
you couldn't have maddened
they couldn't have maddened	I couldn't have been maddening
you couldn't have been maddening
she couldn't have been maddening
we couldn't have been maddening
you couldn't have been maddening
they couldn't 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 	
couldn't I madden?
couldn't you madden?
couldn't she madden?
couldn't we madden?
couldn't you madden?
couldn't they madden? 	couldn't I be maddening?
couldn't you be maddening?
couldn't she be maddening?
couldn't we be maddening?
couldn't you be maddening?
couldn't they be maddening? 	couldn't I have maddened?
couldn't you have maddened?
couldn't she have maddened?
couldn't we have maddened?
couldn't you have maddened?
couldn't they have maddened? 	couldn't I have been maddening?
couldn't you have been maddening?
couldn't she have been maddening?
couldn't we have been maddening?
couldn't you have been maddening?
couldn't they have been maddening?