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 mustn't munch you mustn't munch he mustn't munch we mustn't munch you mustn't munch they mustn't munch	I mustn't be munching you mustn't be munching he mustn't be munching we mustn't be munching you mustn't be munching they mustn't be munching
Perfect	V-ing perfect
I mustn't have munched you mustn't have munched he mustn't have munched we mustn't have munched you mustn't have munched they mustn't have munched	I mustn't have been munching you mustn't have been munching he mustn't have been munching we mustn't have been munching you mustn't have been munching they mustn't 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
mustn't I munch? mustn't you munch? mustn't he munch? mustn't we munch? mustn't you munch? mustn't they munch?	mustn't I be munching? mustn't you be munching? mustn't he be munching? mustn't we be munching? mustn't you be munching? mustn't they be munching?
Perfect	V-ing perfect
mustn't I have munched? mustn't you have munched? mustn't he have munched? mustn't we have munched? mustn't you have munched? mustn't they have munched?	mustn't I have been munching? mustn't you have been munching? mustn't he have been munching? mustn't we have been munching? mustn't you have been munching? mustn't they have been munching?