must classify
Verbo regular: classify - classified- classified

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must classify
you must classify
he must classify
we must classify
you must classify
they must classify 	I must be classifying
you must be classifying
he must be classifying
we must be classifying
you must be classifying
they must be classifying	I must have classified
you must have classified
he must have classified
we must have classified
you must have classified
they must have classified	I must have been classifying
you must have been classifying
he must have been classifying
we must have been classifying
you must have been classifying
they must have been classifying	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not classify
you must not classify
he must not classify
we must not classify
you must not classify
they must not classify 	I must not be classifying
you must not be classifying
he must not be classifying
we must not be classifying
you must not be classifying
they must not be classifying	I must not have classified
you must not have classified
he must not have classified
we must not have classified
you must not have classified
they must not have classified	I must not have been classifying
you must not have been classifying
he must not have been classifying
we must not have been classifying
you must not have been classifying
they must not have been classifying	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I classify?
must you classify?
must he classify?
must we classify?
must you classify?
must they classify? 	must I be classifying?
must you be classifying?
must he be classifying?
must we be classifying?
must you be classifying?
must they be classifying? 	must I have classified?
must you have classified?
must he have classified?
must we have classified?
must you have classified?
must they have classified? 	must I have been classifying?
must you have been classifying?
must he have been classifying?
must we have been classifying?
must you have been classifying?
must they have been classifying? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not classify?
must you not classify?
must he not classify?
must we not classify?
must you not classify?
must they not classify? 	must I not be classifying?
must you not be classifying?
must he not be classifying?
must we not be classifying?
must you not be classifying?
must they not be classifying? 	must I not have classified?
must you not have classified?
must he not have classified?
must we not have classified?
must you not have classified?
must they not have classified? 	must I not have been classifying?
must you not have been classifying?
must he not have been classifying?
must we not have been classifying?
must you not have been classifying?
must they not have been classifying?