must sterilize
Verbo regular: sterilize - sterilized- sterilized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must sterilize
you must sterilize
he must sterilize
we must sterilize
you must sterilize
they must sterilize 	I must be sterilizing
you must be sterilizing
he must be sterilizing
we must be sterilizing
you must be sterilizing
they must be sterilizing	I must have sterilized
you must have sterilized
he must have sterilized
we must have sterilized
you must have sterilized
they must have sterilized	I must have been sterilizing
you must have been sterilizing
he must have been sterilizing
we must have been sterilizing
you must have been sterilizing
they must have been sterilizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not sterilize
you must not sterilize
he must not sterilize
we must not sterilize
you must not sterilize
they must not sterilize 	I must not be sterilizing
you must not be sterilizing
he must not be sterilizing
we must not be sterilizing
you must not be sterilizing
they must not be sterilizing	I must not have sterilized
you must not have sterilized
he must not have sterilized
we must not have sterilized
you must not have sterilized
they must not have sterilized	I must not have been sterilizing
you must not have been sterilizing
he must not have been sterilizing
we must not have been sterilizing
you must not have been sterilizing
they must not have been sterilizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I sterilize?
must you sterilize?
must he sterilize?
must we sterilize?
must you sterilize?
must they sterilize? 	must I be sterilizing?
must you be sterilizing?
must he be sterilizing?
must we be sterilizing?
must you be sterilizing?
must they be sterilizing? 	must I have sterilized?
must you have sterilized?
must he have sterilized?
must we have sterilized?
must you have sterilized?
must they have sterilized? 	must I have been sterilizing?
must you have been sterilizing?
must he have been sterilizing?
must we have been sterilizing?
must you have been sterilizing?
must they have been sterilizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not sterilize?
must you not sterilize?
must he not sterilize?
must we not sterilize?
must you not sterilize?
must they not sterilize? 	must I not be sterilizing?
must you not be sterilizing?
must he not be sterilizing?
must we not be sterilizing?
must you not be sterilizing?
must they not be sterilizing? 	must I not have sterilized?
must you not have sterilized?
must he not have sterilized?
must we not have sterilized?
must you not have sterilized?
must they not have sterilized? 	must I not have been sterilizing?
must you not have been sterilizing?
must he not have been sterilizing?
must we not have been sterilizing?
must you not have been sterilizing?
must they not have been sterilizing?