can roughen
Verbo regular: roughen - roughened- roughened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can roughen
you can roughen
he can roughen
we can roughen
you can roughen
they can roughen 	I can be roughening
you can be roughening
he can be roughening
we can be roughening
you can be roughening
they can be roughening	I can have roughened
you can have roughened
he can have roughened
we can have roughened
you can have roughened
they can have roughened	I can have been roughening
you can have been roughening
he can have been roughening
we can have been roughening
you can have been roughening
they can have been roughening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't roughen
you can't roughen
he can't roughen
we can't roughen
you can't roughen
they can't roughen 	I can't be roughening
you can't be roughening
he can't be roughening
we can't be roughening
you can't be roughening
they can't be roughening	I can't have roughened
you can't have roughened
he can't have roughened
we can't have roughened
you can't have roughened
they can't have roughened	I can't have been roughening
you can't have been roughening
he can't have been roughening
we can't have been roughening
you can't have been roughening
they can't have been roughening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I roughen?
can you roughen?
can he roughen?
can we roughen?
can you roughen?
can they roughen? 	can I be roughening?
can you be roughening?
can he be roughening?
can we be roughening?
can you be roughening?
can they be roughening? 	can I have roughened?
can you have roughened?
can he have roughened?
can we have roughened?
can you have roughened?
can they have roughened? 	can I have been roughening?
can you have been roughening?
can he have been roughening?
can we have been roughening?
can you have been roughening?
can they have been roughening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I roughen?
can't you roughen?
can't he roughen?
can't we roughen?
can't you roughen?
can't they roughen? 	can't I be roughening?
can't you be roughening?
can't he be roughening?
can't we be roughening?
can't you be roughening?
can't they be roughening? 	can't I have roughened?
can't you have roughened?
can't he have roughened?
can't we have roughened?
can't you have roughened?
can't they have roughened? 	can't I have been roughening?
can't you have been roughening?
can't he have been roughening?
can't we have been roughening?
can't you have been roughening?
can't they have been roughening?