must factor
Verbo regular: factor - factored- factored

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must factor
you must factor
he must factor
we must factor
you must factor
they must factor 	I must be factoring
you must be factoring
he must be factoring
we must be factoring
you must be factoring
they must be factoring	I must have factored
you must have factored
he must have factored
we must have factored
you must have factored
they must have factored	I must have been factoring
you must have been factoring
he must have been factoring
we must have been factoring
you must have been factoring
they must have been factoring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not factor
you must not factor
he must not factor
we must not factor
you must not factor
they must not factor 	I must not be factoring
you must not be factoring
he must not be factoring
we must not be factoring
you must not be factoring
they must not be factoring	I must not have factored
you must not have factored
he must not have factored
we must not have factored
you must not have factored
they must not have factored	I must not have been factoring
you must not have been factoring
he must not have been factoring
we must not have been factoring
you must not have been factoring
they must not have been factoring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I factor?
must you factor?
must he factor?
must we factor?
must you factor?
must they factor? 	must I be factoring?
must you be factoring?
must he be factoring?
must we be factoring?
must you be factoring?
must they be factoring? 	must I have factored?
must you have factored?
must he have factored?
must we have factored?
must you have factored?
must they have factored? 	must I have been factoring?
must you have been factoring?
must he have been factoring?
must we have been factoring?
must you have been factoring?
must they have been factoring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not factor?
must you not factor?
must he not factor?
must we not factor?
must you not factor?
must they not factor? 	must I not be factoring?
must you not be factoring?
must he not be factoring?
must we not be factoring?
must you not be factoring?
must they not be factoring? 	must I not have factored?
must you not have factored?
must he not have factored?
must we not have factored?
must you not have factored?
must they not have factored? 	must I not have been factoring?
must you not have been factoring?
must he not have been factoring?
must we not have been factoring?
must you not have been factoring?
must they not have been factoring?