must introduce
Verbo regular: introduce - introduced- introduced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must introduce
you must introduce
he must introduce
we must introduce
you must introduce
they must introduce 	I must be introducing
you must be introducing
he must be introducing
we must be introducing
you must be introducing
they must be introducing	I must have introduced
you must have introduced
he must have introduced
we must have introduced
you must have introduced
they must have introduced	I must have been introducing
you must have been introducing
he must have been introducing
we must have been introducing
you must have been introducing
they must have been introducing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't introduce
you mustn't introduce
he mustn't introduce
we mustn't introduce
you mustn't introduce
they mustn't introduce 	I mustn't be introducing
you mustn't be introducing
he mustn't be introducing
we mustn't be introducing
you mustn't be introducing
they mustn't be introducing	I mustn't have introduced
you mustn't have introduced
he mustn't have introduced
we mustn't have introduced
you mustn't have introduced
they mustn't have introduced	I mustn't have been introducing
you mustn't have been introducing
he mustn't have been introducing
we mustn't have been introducing
you mustn't have been introducing
they mustn't have been introducing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I introduce?
must you introduce?
must he introduce?
must we introduce?
must you introduce?
must they introduce? 	must I be introducing?
must you be introducing?
must he be introducing?
must we be introducing?
must you be introducing?
must they be introducing? 	must I have introduced?
must you have introduced?
must he have introduced?
must we have introduced?
must you have introduced?
must they have introduced? 	must I have been introducing?
must you have been introducing?
must he have been introducing?
must we have been introducing?
must you have been introducing?
must they have been introducing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I introduce?
mustn't you introduce?
mustn't he introduce?
mustn't we introduce?
mustn't you introduce?
mustn't they introduce? 	mustn't I be introducing?
mustn't you be introducing?
mustn't he be introducing?
mustn't we be introducing?
mustn't you be introducing?
mustn't they be introducing? 	mustn't I have introduced?
mustn't you have introduced?
mustn't he have introduced?
mustn't we have introduced?
mustn't you have introduced?
mustn't they have introduced? 	mustn't I have been introducing?
mustn't you have been introducing?
mustn't he have been introducing?
mustn't we have been introducing?
mustn't you have been introducing?
mustn't they have been introducing?