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 cannot rough
you cannot rough
she cannot rough
we cannot rough
you cannot rough
they cannot rough 	I cannot be roughing
you cannot be roughing
she cannot be roughing
we cannot be roughing
you cannot be roughing
they cannot be roughing	I cannot have roughed
you cannot have roughed
she cannot have roughed
we cannot have roughed
you cannot have roughed
they cannot have roughed	I cannot have been roughing
you cannot have been roughing
she cannot have been roughing
we cannot have been roughing
you cannot have been roughing
they cannot 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 I not rough?
can you not rough?
can she not rough?
can we not rough?
can you not rough?
can they not rough? 	can I not be roughing?
can you not be roughing?
can she not be roughing?
can we not be roughing?
can you not be roughing?
can they not be roughing? 	can I not have roughed?
can you not have roughed?
can she not have roughed?
can we not have roughed?
can you not have roughed?
can they not have roughed? 	can I not have been roughing?
can you not have been roughing?
can she not have been roughing?
can we not have been roughing?
can you not have been roughing?
can they not have been roughing?