must zero
Verbo regular: zero - zeroed- zeroed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must zero
you must zero
he must zero
we must zero
you must zero
they must zero 	I must be zeroing
you must be zeroing
he must be zeroing
we must be zeroing
you must be zeroing
they must be zeroing	I must have zeroed
you must have zeroed
he must have zeroed
we must have zeroed
you must have zeroed
they must have zeroed	I must have been zeroing
you must have been zeroing
he must have been zeroing
we must have been zeroing
you must have been zeroing
they must have been zeroing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't zero
you mustn't zero
he mustn't zero
we mustn't zero
you mustn't zero
they mustn't zero 	I mustn't be zeroing
you mustn't be zeroing
he mustn't be zeroing
we mustn't be zeroing
you mustn't be zeroing
they mustn't be zeroing	I mustn't have zeroed
you mustn't have zeroed
he mustn't have zeroed
we mustn't have zeroed
you mustn't have zeroed
they mustn't have zeroed	I mustn't have been zeroing
you mustn't have been zeroing
he mustn't have been zeroing
we mustn't have been zeroing
you mustn't have been zeroing
they mustn't have been zeroing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I zero?
must you zero?
must he zero?
must we zero?
must you zero?
must they zero? 	must I be zeroing?
must you be zeroing?
must he be zeroing?
must we be zeroing?
must you be zeroing?
must they be zeroing? 	must I have zeroed?
must you have zeroed?
must he have zeroed?
must we have zeroed?
must you have zeroed?
must they have zeroed? 	must I have been zeroing?
must you have been zeroing?
must he have been zeroing?
must we have been zeroing?
must you have been zeroing?
must they have been zeroing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I zero?
mustn't you zero?
mustn't he zero?
mustn't we zero?
mustn't you zero?
mustn't they zero? 	mustn't I be zeroing?
mustn't you be zeroing?
mustn't he be zeroing?
mustn't we be zeroing?
mustn't you be zeroing?
mustn't they be zeroing? 	mustn't I have zeroed?
mustn't you have zeroed?
mustn't he have zeroed?
mustn't we have zeroed?
mustn't you have zeroed?
mustn't they have zeroed? 	mustn't I have been zeroing?
mustn't you have been zeroing?
mustn't he have been zeroing?
mustn't we have been zeroing?
mustn't you have been zeroing?
mustn't they have been zeroing?