must unmask
Verbo regular: unmask - unmasked- unmasked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must unmask
you must unmask
he must unmask
we must unmask
you must unmask
they must unmask 	I must be unmasking
you must be unmasking
he must be unmasking
we must be unmasking
you must be unmasking
they must be unmasking	I must have unmasked
you must have unmasked
he must have unmasked
we must have unmasked
you must have unmasked
they must have unmasked	I must have been unmasking
you must have been unmasking
he must have been unmasking
we must have been unmasking
you must have been unmasking
they must have been unmasking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not unmask
you must not unmask
he must not unmask
we must not unmask
you must not unmask
they must not unmask 	I must not be unmasking
you must not be unmasking
he must not be unmasking
we must not be unmasking
you must not be unmasking
they must not be unmasking	I must not have unmasked
you must not have unmasked
he must not have unmasked
we must not have unmasked
you must not have unmasked
they must not have unmasked	I must not have been unmasking
you must not have been unmasking
he must not have been unmasking
we must not have been unmasking
you must not have been unmasking
they must not have been unmasking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I unmask?
must you unmask?
must he unmask?
must we unmask?
must you unmask?
must they unmask? 	must I be unmasking?
must you be unmasking?
must he be unmasking?
must we be unmasking?
must you be unmasking?
must they be unmasking? 	must I have unmasked?
must you have unmasked?
must he have unmasked?
must we have unmasked?
must you have unmasked?
must they have unmasked? 	must I have been unmasking?
must you have been unmasking?
must he have been unmasking?
must we have been unmasking?
must you have been unmasking?
must they have been unmasking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not unmask?
must you not unmask?
must he not unmask?
must we not unmask?
must you not unmask?
must they not unmask? 	must I not be unmasking?
must you not be unmasking?
must he not be unmasking?
must we not be unmasking?
must you not be unmasking?
must they not be unmasking? 	must I not have unmasked?
must you not have unmasked?
must he not have unmasked?
must we not have unmasked?
must you not have unmasked?
must they not have unmasked? 	must I not have been unmasking?
must you not have been unmasking?
must he not have been unmasking?
must we not have been unmasking?
must you not have been unmasking?
must they not have been unmasking?