English verb conjugation
MUST PRONG

Regular verb: prong - pronged - pronged

Affirmation

Simple form	V-ing form
I must prong you must prong he must prong we must prong you must prong they must prong	I must be pronging you must be pronging he must be pronging we must be pronging you must be pronging they must be pronging
Perfect	V-ing perfect
I must have pronged you must have pronged he must have pronged we must have pronged you must have pronged they must have pronged	I must have been pronging you must have been pronging he must have been pronging we must have been pronging you must have been pronging they must have been pronging

Negation

Simple form	V-ing form
I must not prong you must not prong he must not prong we must not prong you must not prong they must not prong	I must not be pronging you must not be pronging he must not be pronging we must not be pronging you must not be pronging they must not be pronging
Perfect	V-ing perfect
I must not have pronged you must not have pronged he must not have pronged we must not have pronged you must not have pronged they must not have pronged	I must not have been pronging you must not have been pronging he must not have been pronging we must not have been pronging you must not have been pronging they must not have been pronging

Interrogative form

Simple form	V-ing form
must I prong? must you prong? must he prong? must we prong? must you prong? must they prong?	must I be pronging? must you be pronging? must he be pronging? must we be pronging? must you be pronging? must they be pronging?
Perfect	V-ing perfect
must I have pronged? must you have pronged? must he have pronged? must we have pronged? must you have pronged? must they have pronged?	must I have been pronging? must you have been pronging? must he have been pronging? must we have been pronging? must you have been pronging? must they have been pronging?

Interro-negative form

Simple form	V-ing form
must I not prong? must you not prong? must he not prong? must we not prong? must you not prong? must they not prong?	must I not be pronging? must you not be pronging? must he not be pronging? must we not be pronging? must you not be pronging? must they not be pronging?
Perfect	V-ing perfect
must I not have pronged? must you not have pronged? must he not have pronged? must we not have pronged? must you not have pronged? must they not have pronged?	must I not have been pronging? must you not have been pronging? must he not have been pronging? must we not have been pronging? must you not have been pronging? must they not have been pronging?