must alter
Regelmä&szlig;iges Verb: alter - altered- altered

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must alter
you must alter
he must alter
we must alter
you must alter
they must alter 	I must be altering
you must be altering
he must be altering
we must be altering
you must be altering
they must be altering	I must have altered
you must have altered
he must have altered
we must have altered
you must have altered
they must have altered	I must have been altering
you must have been altering
he must have been altering
we must have been altering
you must have been altering
they must have been altering	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I mustn't alter
you mustn't alter
he mustn't alter
we mustn't alter
you mustn't alter
they mustn't alter 	I mustn't be altering
you mustn't be altering
he mustn't be altering
we mustn't be altering
you mustn't be altering
they mustn't be altering	I mustn't have altered
you mustn't have altered
he mustn't have altered
we mustn't have altered
you mustn't have altered
they mustn't have altered	I mustn't have been altering
you mustn't have been altering
he mustn't have been altering
we mustn't have been altering
you mustn't have been altering
they mustn't have been altering	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I alter?
must you alter?
must he alter?
must we alter?
must you alter?
must they alter? 	must I be altering?
must you be altering?
must he be altering?
must we be altering?
must you be altering?
must they be altering? 	must I have altered?
must you have altered?
must he have altered?
must we have altered?
must you have altered?
must they have altered? 	must I have been altering?
must you have been altering?
must he have been altering?
must we have been altering?
must you have been altering?
must they have been altering? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
mustn't I alter?
mustn't you alter?
mustn't he alter?
mustn't we alter?
mustn't you alter?
mustn't they alter? 	mustn't I be altering?
mustn't you be altering?
mustn't he be altering?
mustn't we be altering?
mustn't you be altering?
mustn't they be altering? 	mustn't I have altered?
mustn't you have altered?
mustn't he have altered?
mustn't we have altered?
mustn't you have altered?
mustn't they have altered? 	mustn't I have been altering?
mustn't you have been altering?
mustn't he have been altering?
mustn't we have been altering?
mustn't you have been altering?
mustn't they have been altering?