must disable
Regular verb: disable - disabled- disabled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must disable
you must disable
he must disable
we must disable
you must disable
they must disable 	I must be disabling
you must be disabling
he must be disabling
we must be disabling
you must be disabling
they must be disabling	I must have disabled
you must have disabled
he must have disabled
we must have disabled
you must have disabled
they must have disabled	I must have been disabling
you must have been disabling
he must have been disabling
we must have been disabling
you must have been disabling
they must have been disabling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't disable
you mustn't disable
he mustn't disable
we mustn't disable
you mustn't disable
they mustn't disable 	I mustn't be disabling
you mustn't be disabling
he mustn't be disabling
we mustn't be disabling
you mustn't be disabling
they mustn't be disabling	I mustn't have disabled
you mustn't have disabled
he mustn't have disabled
we mustn't have disabled
you mustn't have disabled
they mustn't have disabled	I mustn't have been disabling
you mustn't have been disabling
he mustn't have been disabling
we mustn't have been disabling
you mustn't have been disabling
they mustn't have been disabling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I disable?
must you disable?
must he disable?
must we disable?
must you disable?
must they disable? 	must I be disabling?
must you be disabling?
must he be disabling?
must we be disabling?
must you be disabling?
must they be disabling? 	must I have disabled?
must you have disabled?
must he have disabled?
must we have disabled?
must you have disabled?
must they have disabled? 	must I have been disabling?
must you have been disabling?
must he have been disabling?
must we have been disabling?
must you have been disabling?
must they have been disabling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I disable?
mustn't you disable?
mustn't he disable?
mustn't we disable?
mustn't you disable?
mustn't they disable? 	mustn't I be disabling?
mustn't you be disabling?
mustn't he be disabling?
mustn't we be disabling?
mustn't you be disabling?
mustn't they be disabling? 	mustn't I have disabled?
mustn't you have disabled?
mustn't he have disabled?
mustn't we have disabled?
mustn't you have disabled?
mustn't they have disabled? 	mustn't I have been disabling?
mustn't you have been disabling?
mustn't he have been disabling?
mustn't we have been disabling?
mustn't you have been disabling?
mustn't they have been disabling?