English verb conjugation
MUST OFFER

Regular verb: offer - offered - offered

Affirmation

Simple form	V-ing form
I must offer you must offer he must offer we must offer you must offer they must offer	I must be offering you must be offering he must be offering we must be offering you must be offering they must be offering
Perfect	V-ing perfect
I must have offered you must have offered he must have offered we must have offered you must have offered they must have offered	I must have been offering you must have been offering he must have been offering we must have been offering you must have been offering they must have been offering

Negation

Simple form	V-ing form
I must not offer you must not offer he must not offer we must not offer you must not offer they must not offer	I must not be offering you must not be offering he must not be offering we must not be offering you must not be offering they must not be offering
Perfect	V-ing perfect
I must not have offered you must not have offered he must not have offered we must not have offered you must not have offered they must not have offered	I must not have been offering you must not have been offering he must not have been offering we must not have been offering you must not have been offering they must not have been offering

Interrogative form

Simple form	V-ing form
must I offer? must you offer? must he offer? must we offer? must you offer? must they offer?	must I be offering? must you be offering? must he be offering? must we be offering? must you be offering? must they be offering?
Perfect	V-ing perfect
must I have offered? must you have offered? must he have offered? must we have offered? must you have offered? must they have offered?	must I have been offering? must you have been offering? must he have been offering? must we have been offering? must you have been offering? must they have been offering?

Interro-negative form

Simple form	V-ing form
must I not offer? must you not offer? must he not offer? must we not offer? must you not offer? must they not offer?	must I not be offering? must you not be offering? must he not be offering? must we not be offering? must you not be offering? must they not be offering?
Perfect	V-ing perfect
must I not have offered? must you not have offered? must he not have offered? must we not have offered? must you not have offered? must they not have offered?	must I not have been offering? must you not have been offering? must he not have been offering? must we not have been offering? must you not have been offering? must they not have been offering?