could rough
Regular verb: rough - roughed- roughed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rough
you could rough
he could rough
we could rough
you could rough
they could rough 	I could be roughing
you could be roughing
he could be roughing
we could be roughing
you could be roughing
they could be roughing	I could have roughed
you could have roughed
he could have roughed
we could have roughed
you could have roughed
they could have roughed	I could have been roughing
you could have been roughing
he could have been roughing
we could have been roughing
you could have been roughing
they could have been roughing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't rough
you couldn't rough
he couldn't rough
we couldn't rough
you couldn't rough
they couldn't rough 	I couldn't be roughing
you couldn't be roughing
he couldn't be roughing
we couldn't be roughing
you couldn't be roughing
they couldn't be roughing	I couldn't have roughed
you couldn't have roughed
he couldn't have roughed
we couldn't have roughed
you couldn't have roughed
they couldn't have roughed	I couldn't have been roughing
you couldn't have been roughing
he couldn't have been roughing
we couldn't have been roughing
you couldn't have been roughing
they couldn't have been roughing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I rough?
could you rough?
could he rough?
could we rough?
could you rough?
could they rough? 	could I be roughing?
could you be roughing?
could he be roughing?
could we be roughing?
could you be roughing?
could they be roughing? 	could I have roughed?
could you have roughed?
could he have roughed?
could we have roughed?
could you have roughed?
could they have roughed? 	could I have been roughing?
could you have been roughing?
could he have been roughing?
could we have been roughing?
could you have been roughing?
could they have been roughing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I rough?
couldn't you rough?
couldn't he rough?
couldn't we rough?
couldn't you rough?
couldn't they rough? 	couldn't I be roughing?
couldn't you be roughing?
couldn't he be roughing?
couldn't we be roughing?
couldn't you be roughing?
couldn't they be roughing? 	couldn't I have roughed?
couldn't you have roughed?
couldn't he have roughed?
couldn't we have roughed?
couldn't you have roughed?
couldn't they have roughed? 	couldn't I have been roughing?
couldn't you have been roughing?
couldn't he have been roughing?
couldn't we have been roughing?
couldn't you have been roughing?
couldn't they have been roughing?