English verb conjugation
MUST MUNCH

Regular verb: munch - munched - munched

Affirmation

Simple form	V-ing form
I must munch you must munch he must munch we must munch you must munch they must munch	I must be munching you must be munching he must be munching we must be munching you must be munching they must be munching
Perfect	V-ing perfect
I must have munched you must have munched he must have munched we must have munched you must have munched they must have munched	I must have been munching you must have been munching he must have been munching we must have been munching you must have been munching they must have been munching

Negation

Simple form	V-ing form
I must not munch you must not munch he must not munch we must not munch you must not munch they must not munch	I must not be munching you must not be munching he must not be munching we must not be munching you must not be munching they must not be munching
Perfect	V-ing perfect
I must not have munched you must not have munched he must not have munched we must not have munched you must not have munched they must not have munched	I must not have been munching you must not have been munching he must not have been munching we must not have been munching you must not have been munching they must not have been munching

Interrogative form

Simple form	V-ing form
must I munch? must you munch? must he munch? must we munch? must you munch? must they munch?	must I be munching? must you be munching? must he be munching? must we be munching? must you be munching? must they be munching?
Perfect	V-ing perfect
must I have munched? must you have munched? must he have munched? must we have munched? must you have munched? must they have munched?	must I have been munching? must you have been munching? must he have been munching? must we have been munching? must you have been munching? must they have been munching?

Interro-negative form

Simple form	V-ing form
must I not munch? must you not munch? must he not munch? must we not munch? must you not munch? must they not munch?	must I not be munching? must you not be munching? must he not be munching? must we not be munching? must you not be munching? must they not be munching?
Perfect	V-ing perfect
must I not have munched? must you not have munched? must he not have munched? must we not have munched? must you not have munched? must they not have munched?	must I not have been munching? must you not have been munching? must he not have been munching? must we not have been munching? must you not have been munching? must they not have been munching?