must accustom
Regular verb: accustom - accustomed- accustomed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must accustom
you must accustom
he must accustom
we must accustom
you must accustom
they must accustom 	I must be accustoming
you must be accustoming
he must be accustoming
we must be accustoming
you must be accustoming
they must be accustoming	I must have accustomed
you must have accustomed
he must have accustomed
we must have accustomed
you must have accustomed
they must have accustomed	I must have been accustoming
you must have been accustoming
he must have been accustoming
we must have been accustoming
you must have been accustoming
they must have been accustoming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't accustom
you mustn't accustom
he mustn't accustom
we mustn't accustom
you mustn't accustom
they mustn't accustom 	I mustn't be accustoming
you mustn't be accustoming
he mustn't be accustoming
we mustn't be accustoming
you mustn't be accustoming
they mustn't be accustoming	I mustn't have accustomed
you mustn't have accustomed
he mustn't have accustomed
we mustn't have accustomed
you mustn't have accustomed
they mustn't have accustomed	I mustn't have been accustoming
you mustn't have been accustoming
he mustn't have been accustoming
we mustn't have been accustoming
you mustn't have been accustoming
they mustn't have been accustoming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I accustom?
must you accustom?
must he accustom?
must we accustom?
must you accustom?
must they accustom? 	must I be accustoming?
must you be accustoming?
must he be accustoming?
must we be accustoming?
must you be accustoming?
must they be accustoming? 	must I have accustomed?
must you have accustomed?
must he have accustomed?
must we have accustomed?
must you have accustomed?
must they have accustomed? 	must I have been accustoming?
must you have been accustoming?
must he have been accustoming?
must we have been accustoming?
must you have been accustoming?
must they have been accustoming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I accustom?
mustn't you accustom?
mustn't he accustom?
mustn't we accustom?
mustn't you accustom?
mustn't they accustom? 	mustn't I be accustoming?
mustn't you be accustoming?
mustn't he be accustoming?
mustn't we be accustoming?
mustn't you be accustoming?
mustn't they be accustoming? 	mustn't I have accustomed?
mustn't you have accustomed?
mustn't he have accustomed?
mustn't we have accustomed?
mustn't you have accustomed?
mustn't they have accustomed? 	mustn't I have been accustoming?
mustn't you have been accustoming?
mustn't he have been accustoming?
mustn't we have been accustoming?
mustn't you have been accustoming?
mustn't they have been accustoming?