can rough
Regular verb: rough - roughed- roughed

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

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

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

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