must disconfirm
Regular verb: disconfirm - disconfirmed- disconfirmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must disconfirm
you must disconfirm
he must disconfirm
we must disconfirm
you must disconfirm
they must disconfirm 	I must be disconfirming
you must be disconfirming
he must be disconfirming
we must be disconfirming
you must be disconfirming
they must be disconfirming	I must have disconfirmed
you must have disconfirmed
he must have disconfirmed
we must have disconfirmed
you must have disconfirmed
they must have disconfirmed	I must have been disconfirming
you must have been disconfirming
he must have been disconfirming
we must have been disconfirming
you must have been disconfirming
they must have been disconfirming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't disconfirm
you mustn't disconfirm
he mustn't disconfirm
we mustn't disconfirm
you mustn't disconfirm
they mustn't disconfirm 	I mustn't be disconfirming
you mustn't be disconfirming
he mustn't be disconfirming
we mustn't be disconfirming
you mustn't be disconfirming
they mustn't be disconfirming	I mustn't have disconfirmed
you mustn't have disconfirmed
he mustn't have disconfirmed
we mustn't have disconfirmed
you mustn't have disconfirmed
they mustn't have disconfirmed	I mustn't have been disconfirming
you mustn't have been disconfirming
he mustn't have been disconfirming
we mustn't have been disconfirming
you mustn't have been disconfirming
they mustn't have been disconfirming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I disconfirm?
must you disconfirm?
must he disconfirm?
must we disconfirm?
must you disconfirm?
must they disconfirm? 	must I be disconfirming?
must you be disconfirming?
must he be disconfirming?
must we be disconfirming?
must you be disconfirming?
must they be disconfirming? 	must I have disconfirmed?
must you have disconfirmed?
must he have disconfirmed?
must we have disconfirmed?
must you have disconfirmed?
must they have disconfirmed? 	must I have been disconfirming?
must you have been disconfirming?
must he have been disconfirming?
must we have been disconfirming?
must you have been disconfirming?
must they have been disconfirming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I disconfirm?
mustn't you disconfirm?
mustn't he disconfirm?
mustn't we disconfirm?
mustn't you disconfirm?
mustn't they disconfirm? 	mustn't I be disconfirming?
mustn't you be disconfirming?
mustn't he be disconfirming?
mustn't we be disconfirming?
mustn't you be disconfirming?
mustn't they be disconfirming? 	mustn't I have disconfirmed?
mustn't you have disconfirmed?
mustn't he have disconfirmed?
mustn't we have disconfirmed?
mustn't you have disconfirmed?
mustn't they have disconfirmed? 	mustn't I have been disconfirming?
mustn't you have been disconfirming?
mustn't he have been disconfirming?
mustn't we have been disconfirming?
mustn't you have been disconfirming?
mustn't they have been disconfirming?