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 must not disconfirm
you must not disconfirm
he must not disconfirm
we must not disconfirm
you must not disconfirm
they must not disconfirm 	I must not be disconfirming
you must not be disconfirming
he must not be disconfirming
we must not be disconfirming
you must not be disconfirming
they must not be disconfirming	I must not have disconfirmed
you must not have disconfirmed
he must not have disconfirmed
we must not have disconfirmed
you must not have disconfirmed
they must not have disconfirmed	I must not have been disconfirming
you must not have been disconfirming
he must not have been disconfirming
we must not have been disconfirming
you must not have been disconfirming
they must not 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 	
must I not disconfirm?
must you not disconfirm?
must he not disconfirm?
must we not disconfirm?
must you not disconfirm?
must they not disconfirm? 	must I not be disconfirming?
must you not be disconfirming?
must he not be disconfirming?
must we not be disconfirming?
must you not be disconfirming?
must they not be disconfirming? 	must I not have disconfirmed?
must you not have disconfirmed?
must he not have disconfirmed?
must we not have disconfirmed?
must you not have disconfirmed?
must they not have disconfirmed? 	must I not have been disconfirming?
must you not have been disconfirming?
must he not have been disconfirming?
must we not have been disconfirming?
must you not have been disconfirming?
must they not have been disconfirming?