must purify
Verbo regular: purify - purified- purified

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must purify
you must purify
he must purify
we must purify
you must purify
they must purify 	I must be purifying
you must be purifying
he must be purifying
we must be purifying
you must be purifying
they must be purifying	I must have purified
you must have purified
he must have purified
we must have purified
you must have purified
they must have purified	I must have been purifying
you must have been purifying
he must have been purifying
we must have been purifying
you must have been purifying
they must have been purifying	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't purify
you mustn't purify
he mustn't purify
we mustn't purify
you mustn't purify
they mustn't purify 	I mustn't be purifying
you mustn't be purifying
he mustn't be purifying
we mustn't be purifying
you mustn't be purifying
they mustn't be purifying	I mustn't have purified
you mustn't have purified
he mustn't have purified
we mustn't have purified
you mustn't have purified
they mustn't have purified	I mustn't have been purifying
you mustn't have been purifying
he mustn't have been purifying
we mustn't have been purifying
you mustn't have been purifying
they mustn't have been purifying	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I purify?
must you purify?
must he purify?
must we purify?
must you purify?
must they purify? 	must I be purifying?
must you be purifying?
must he be purifying?
must we be purifying?
must you be purifying?
must they be purifying? 	must I have purified?
must you have purified?
must he have purified?
must we have purified?
must you have purified?
must they have purified? 	must I have been purifying?
must you have been purifying?
must he have been purifying?
must we have been purifying?
must you have been purifying?
must they have been purifying? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I purify?
mustn't you purify?
mustn't he purify?
mustn't we purify?
mustn't you purify?
mustn't they purify? 	mustn't I be purifying?
mustn't you be purifying?
mustn't he be purifying?
mustn't we be purifying?
mustn't you be purifying?
mustn't they be purifying? 	mustn't I have purified?
mustn't you have purified?
mustn't he have purified?
mustn't we have purified?
mustn't you have purified?
mustn't they have purified? 	mustn't I have been purifying?
mustn't you have been purifying?
mustn't he have been purifying?
mustn't we have been purifying?
mustn't you have been purifying?
mustn't they have been purifying?