must inform
Verbo regular: inform - informed- informed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must inform
you must inform
he must inform
we must inform
you must inform
they must inform 	I must be informing
you must be informing
he must be informing
we must be informing
you must be informing
they must be informing	I must have informed
you must have informed
he must have informed
we must have informed
you must have informed
they must have informed	I must have been informing
you must have been informing
he must have been informing
we must have been informing
you must have been informing
they must have been informing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not inform
you must not inform
he must not inform
we must not inform
you must not inform
they must not inform 	I must not be informing
you must not be informing
he must not be informing
we must not be informing
you must not be informing
they must not be informing	I must not have informed
you must not have informed
he must not have informed
we must not have informed
you must not have informed
they must not have informed	I must not have been informing
you must not have been informing
he must not have been informing
we must not have been informing
you must not have been informing
they must not have been informing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I inform?
must you inform?
must he inform?
must we inform?
must you inform?
must they inform? 	must I be informing?
must you be informing?
must he be informing?
must we be informing?
must you be informing?
must they be informing? 	must I have informed?
must you have informed?
must he have informed?
must we have informed?
must you have informed?
must they have informed? 	must I have been informing?
must you have been informing?
must he have been informing?
must we have been informing?
must you have been informing?
must they have been informing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not inform?
must you not inform?
must he not inform?
must we not inform?
must you not inform?
must they not inform? 	must I not be informing?
must you not be informing?
must he not be informing?
must we not be informing?
must you not be informing?
must they not be informing? 	must I not have informed?
must you not have informed?
must he not have informed?
must we not have informed?
must you not have informed?
must they not have informed? 	must I not have been informing?
must you not have been informing?
must he not have been informing?
must we not have been informing?
must you not have been informing?
must they not have been informing?