could roughen
Verbo regolare: roughen - roughened- roughened

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could roughen
you could roughen
she could roughen
we could roughen
you could roughen
they could roughen 	I could be roughening
you could be roughening
she could be roughening
we could be roughening
you could be roughening
they could be roughening	I could have roughened
you could have roughened
she could have roughened
we could have roughened
you could have roughened
they could have roughened	I could have been roughening
you could have been roughening
she could have been roughening
we could have been roughening
you could have been roughening
they could have been roughening	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not roughen
you could not roughen
she could not roughen
we could not roughen
you could not roughen
they could not roughen 	I could not be roughening
you could not be roughening
she could not be roughening
we could not be roughening
you could not be roughening
they could not be roughening	I could not have roughened
you could not have roughened
she could not have roughened
we could not have roughened
you could not have roughened
they could not have roughened	I could not have been roughening
you could not have been roughening
she could not have been roughening
we could not have been roughening
you could not have been roughening
they could not have been roughening	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I roughen?
could you roughen?
could she roughen?
could we roughen?
could you roughen?
could they roughen? 	could I be roughening?
could you be roughening?
could she be roughening?
could we be roughening?
could you be roughening?
could they be roughening? 	could I have roughened?
could you have roughened?
could she have roughened?
could we have roughened?
could you have roughened?
could they have roughened? 	could I have been roughening?
could you have been roughening?
could she have been roughening?
could we have been roughening?
could you have been roughening?
could they have been roughening? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not roughen?
could you not roughen?
could she not roughen?
could we not roughen?
could you not roughen?
could they not roughen? 	could I not be roughening?
could you not be roughening?
could she not be roughening?
could we not be roughening?
could you not be roughening?
could they not be roughening? 	could I not have roughened?
could you not have roughened?
could she not have roughened?
could we not have roughened?
could you not have roughened?
could they not have roughened? 	could I not have been roughening?
could you not have been roughening?
could she not have been roughening?
could we not have been roughening?
could you not have been roughening?
could they not have been roughening?