must roughen
Verbo regular: roughen - roughened- roughened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must roughen
you must roughen
he must roughen
we must roughen
you must roughen
they must roughen 	I must be roughening
you must be roughening
he must be roughening
we must be roughening
you must be roughening
they must be roughening	I must have roughened
you must have roughened
he must have roughened
we must have roughened
you must have roughened
they must have roughened	I must have been roughening
you must have been roughening
he must have been roughening
we must have been roughening
you must have been roughening
they must have been roughening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't roughen
you mustn't roughen
he mustn't roughen
we mustn't roughen
you mustn't roughen
they mustn't roughen 	I mustn't be roughening
you mustn't be roughening
he mustn't be roughening
we mustn't be roughening
you mustn't be roughening
they mustn't be roughening	I mustn't have roughened
you mustn't have roughened
he mustn't have roughened
we mustn't have roughened
you mustn't have roughened
they mustn't have roughened	I mustn't have been roughening
you mustn't have been roughening
he mustn't have been roughening
we mustn't have been roughening
you mustn't have been roughening
they mustn't have been roughening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I roughen?
must you roughen?
must he roughen?
must we roughen?
must you roughen?
must they roughen? 	must I be roughening?
must you be roughening?
must he be roughening?
must we be roughening?
must you be roughening?
must they be roughening? 	must I have roughened?
must you have roughened?
must he have roughened?
must we have roughened?
must you have roughened?
must they have roughened? 	must I have been roughening?
must you have been roughening?
must he have been roughening?
must we have been roughening?
must you have been roughening?
must they have been roughening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I roughen?
mustn't you roughen?
mustn't he roughen?
mustn't we roughen?
mustn't you roughen?
mustn't they roughen? 	mustn't I be roughening?
mustn't you be roughening?
mustn't he be roughening?
mustn't we be roughening?
mustn't you be roughening?
mustn't they be roughening? 	mustn't I have roughened?
mustn't you have roughened?
mustn't he have roughened?
mustn't we have roughened?
mustn't you have roughened?
mustn't they have roughened? 	mustn't I have been roughening?
mustn't you have been roughening?
mustn't he have been roughening?
mustn't we have been roughening?
mustn't you have been roughening?
mustn't they have been roughening?