must roughneck
Verbo regular: roughneck - roughnecked- roughnecked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must roughneck
you must roughneck
he must roughneck
we must roughneck
you must roughneck
they must roughneck 	I must be roughnecking
you must be roughnecking
he must be roughnecking
we must be roughnecking
you must be roughnecking
they must be roughnecking	I must have roughnecked
you must have roughnecked
he must have roughnecked
we must have roughnecked
you must have roughnecked
they must have roughnecked	I must have been roughnecking
you must have been roughnecking
he must have been roughnecking
we must have been roughnecking
you must have been roughnecking
they must have been roughnecking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not roughneck
you must not roughneck
he must not roughneck
we must not roughneck
you must not roughneck
they must not roughneck 	I must not be roughnecking
you must not be roughnecking
he must not be roughnecking
we must not be roughnecking
you must not be roughnecking
they must not be roughnecking	I must not have roughnecked
you must not have roughnecked
he must not have roughnecked
we must not have roughnecked
you must not have roughnecked
they must not have roughnecked	I must not have been roughnecking
you must not have been roughnecking
he must not have been roughnecking
we must not have been roughnecking
you must not have been roughnecking
they must not have been roughnecking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I roughneck?
must you roughneck?
must he roughneck?
must we roughneck?
must you roughneck?
must they roughneck? 	must I be roughnecking?
must you be roughnecking?
must he be roughnecking?
must we be roughnecking?
must you be roughnecking?
must they be roughnecking? 	must I have roughnecked?
must you have roughnecked?
must he have roughnecked?
must we have roughnecked?
must you have roughnecked?
must they have roughnecked? 	must I have been roughnecking?
must you have been roughnecking?
must he have been roughnecking?
must we have been roughnecking?
must you have been roughnecking?
must they have been roughnecking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not roughneck?
must you not roughneck?
must he not roughneck?
must we not roughneck?
must you not roughneck?
must they not roughneck? 	must I not be roughnecking?
must you not be roughnecking?
must he not be roughnecking?
must we not be roughnecking?
must you not be roughnecking?
must they not be roughnecking? 	must I not have roughnecked?
must you not have roughnecked?
must he not have roughnecked?
must we not have roughnecked?
must you not have roughnecked?
must they not have roughnecked? 	must I not have been roughnecking?
must you not have been roughnecking?
must he not have been roughnecking?
must we not have been roughnecking?
must you not have been roughnecking?
must they not have been roughnecking?