English verb conjugation
MUST CONFIRM

Regular verb: confirm - confirmed - confirmed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I must not confirm you must not confirm he must not confirm we must not confirm you must not confirm they must not confirm	I must not be confirming you must not be confirming he must not be confirming we must not be confirming you must not be confirming they must not be confirming
Perfect	V-ing perfect
I must not have confirmed you must not have confirmed he must not have confirmed we must not have confirmed you must not have confirmed they must not have confirmed	I must not have been confirming you must not have been confirming he must not have been confirming we must not have been confirming you must not have been confirming they must not have been confirming

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
must I not confirm? must you not confirm? must he not confirm? must we not confirm? must you not confirm? must they not confirm?	must I not be confirming? must you not be confirming? must he not be confirming? must we not be confirming? must you not be confirming? must they not be confirming?
Perfect	V-ing perfect
must I not have confirmed? must you not have confirmed? must he not have confirmed? must we not have confirmed? must you not have confirmed? must they not have confirmed?	must I not have been confirming? must you not have been confirming? must he not have been confirming? must we not have been confirming? must you not have been confirming? must they not have been confirming?