could corduroy
Regular verb: corduroy - corduroyed- corduroyed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could corduroy
you could corduroy
he could corduroy
we could corduroy
you could corduroy
they could corduroy 	I could be corduroying
you could be corduroying
he could be corduroying
we could be corduroying
you could be corduroying
they could be corduroying	I could have corduroyed
you could have corduroyed
he could have corduroyed
we could have corduroyed
you could have corduroyed
they could have corduroyed	I could have been corduroying
you could have been corduroying
he could have been corduroying
we could have been corduroying
you could have been corduroying
they could have been corduroying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't corduroy
you couldn't corduroy
he couldn't corduroy
we couldn't corduroy
you couldn't corduroy
they couldn't corduroy 	I couldn't be corduroying
you couldn't be corduroying
he couldn't be corduroying
we couldn't be corduroying
you couldn't be corduroying
they couldn't be corduroying	I couldn't have corduroyed
you couldn't have corduroyed
he couldn't have corduroyed
we couldn't have corduroyed
you couldn't have corduroyed
they couldn't have corduroyed	I couldn't have been corduroying
you couldn't have been corduroying
he couldn't have been corduroying
we couldn't have been corduroying
you couldn't have been corduroying
they couldn't have been corduroying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I corduroy?
could you corduroy?
could he corduroy?
could we corduroy?
could you corduroy?
could they corduroy? 	could I be corduroying?
could you be corduroying?
could he be corduroying?
could we be corduroying?
could you be corduroying?
could they be corduroying? 	could I have corduroyed?
could you have corduroyed?
could he have corduroyed?
could we have corduroyed?
could you have corduroyed?
could they have corduroyed? 	could I have been corduroying?
could you have been corduroying?
could he have been corduroying?
could we have been corduroying?
could you have been corduroying?
could they have been corduroying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I corduroy?
couldn't you corduroy?
couldn't he corduroy?
couldn't we corduroy?
couldn't you corduroy?
couldn't they corduroy? 	couldn't I be corduroying?
couldn't you be corduroying?
couldn't he be corduroying?
couldn't we be corduroying?
couldn't you be corduroying?
couldn't they be corduroying? 	couldn't I have corduroyed?
couldn't you have corduroyed?
couldn't he have corduroyed?
couldn't we have corduroyed?
couldn't you have corduroyed?
couldn't they have corduroyed? 	couldn't I have been corduroying?
couldn't you have been corduroying?
couldn't he have been corduroying?
couldn't we have been corduroying?
couldn't you have been corduroying?
couldn't they have been corduroying?