must accustom
Regular verb: accustom - accustomed- accustomed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must accustom
you must accustom
she must accustom
we must accustom
you must accustom
they must accustom 	I must be accustoming
you must be accustoming
she must be accustoming
we must be accustoming
you must be accustoming
they must be accustoming	I must have accustomed
you must have accustomed
she 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
she 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 must not accustom
you must not accustom
she must not accustom
we must not accustom
you must not accustom
they must not accustom 	I must not be accustoming
you must not be accustoming
she must not be accustoming
we must not be accustoming
you must not be accustoming
they must not be accustoming	I must not have accustomed
you must not have accustomed
she must not have accustomed
we must not have accustomed
you must not have accustomed
they must not have accustomed	I must not have been accustoming
you must not have been accustoming
she must not have been accustoming
we must not have been accustoming
you must not have been accustoming
they must not have been accustoming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I accustom?
must you accustom?
must she accustom?
must we accustom?
must you accustom?
must they accustom? 	must I be accustoming?
must you be accustoming?
must she be accustoming?
must we be accustoming?
must you be accustoming?
must they be accustoming? 	must I have accustomed?
must you have accustomed?
must she 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 she 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 	
must I not accustom?
must you not accustom?
must she not accustom?
must we not accustom?
must you not accustom?
must they not accustom? 	must I not be accustoming?
must you not be accustoming?
must she not be accustoming?
must we not be accustoming?
must you not be accustoming?
must they not be accustoming? 	must I not have accustomed?
must you not have accustomed?
must she not have accustomed?
must we not have accustomed?
must you not have accustomed?
must they not have accustomed? 	must I not have been accustoming?
must you not have been accustoming?
must she not have been accustoming?
must we not have been accustoming?
must you not have been accustoming?
must they not have been accustoming?