must confirm
Regular verb: confirm - confirmed- confirmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must confirm
you must confirm
he must confirm
we must confirm
you must confirm
they must confirm 	I must be confirming
you must be confirming
he must be confirming
we must be confirming
you must be confirming
they must be confirming	I must have confirmed
you must have confirmed
he must have confirmed
we must have confirmed
you must have confirmed
they must have confirmed	I must have been confirming
you must have been confirming
he must have been confirming
we must have been confirming
you must have been confirming
they must have been confirming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't confirm
you mustn't confirm
he mustn't confirm
we mustn't confirm
you mustn't confirm
they mustn't confirm 	I mustn't be confirming
you mustn't be confirming
he mustn't be confirming
we mustn't be confirming
you mustn't be confirming
they mustn't be confirming	I mustn't have confirmed
you mustn't have confirmed
he mustn't have confirmed
we mustn't have confirmed
you mustn't have confirmed
they mustn't have confirmed	I mustn't have been confirming
you mustn't have been confirming
he mustn't have been confirming
we mustn't have been confirming
you mustn't have been confirming
they mustn't have been confirming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I confirm?
must you confirm?
must he confirm?
must we confirm?
must you confirm?
must they confirm? 	must I be confirming?
must you be confirming?
must he be confirming?
must we be confirming?
must you be confirming?
must they be confirming? 	must I have confirmed?
must you have confirmed?
must he have confirmed?
must we have confirmed?
must you have confirmed?
must they have confirmed? 	must I have been confirming?
must you have been confirming?
must he have been confirming?
must we have been confirming?
must you have been confirming?
must they have been confirming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I confirm?
mustn't you confirm?
mustn't he confirm?
mustn't we confirm?
mustn't you confirm?
mustn't they confirm? 	mustn't I be confirming?
mustn't you be confirming?
mustn't he be confirming?
mustn't we be confirming?
mustn't you be confirming?
mustn't they be confirming? 	mustn't I have confirmed?
mustn't you have confirmed?
mustn't he have confirmed?
mustn't we have confirmed?
mustn't you have confirmed?
mustn't they have confirmed? 	mustn't I have been confirming?
mustn't you have been confirming?
mustn't he have been confirming?
mustn't we have been confirming?
mustn't you have been confirming?
mustn't they have been confirming?