English verb conjugation
MUST FESTOON

Regular verb: festoon - festooned - festooned

Affirmation

Simple form	V-ing form
I must festoon you must festoon he must festoon we must festoon you must festoon they must festoon	I must be festooning you must be festooning he must be festooning we must be festooning you must be festooning they must be festooning
Perfect	V-ing perfect
I must have festooned you must have festooned he must have festooned we must have festooned you must have festooned they must have festooned	I must have been festooning you must have been festooning he must have been festooning we must have been festooning you must have been festooning they must have been festooning

Negation

Simple form	V-ing form
I mustn't festoon you mustn't festoon he mustn't festoon we mustn't festoon you mustn't festoon they mustn't festoon	I mustn't be festooning you mustn't be festooning he mustn't be festooning we mustn't be festooning you mustn't be festooning they mustn't be festooning
Perfect	V-ing perfect
I mustn't have festooned you mustn't have festooned he mustn't have festooned we mustn't have festooned you mustn't have festooned they mustn't have festooned	I mustn't have been festooning you mustn't have been festooning he mustn't have been festooning we mustn't have been festooning you mustn't have been festooning they mustn't have been festooning

Interrogative form

Simple form	V-ing form
must I festoon? must you festoon? must he festoon? must we festoon? must you festoon? must they festoon?	must I be festooning? must you be festooning? must he be festooning? must we be festooning? must you be festooning? must they be festooning?
Perfect	V-ing perfect
must I have festooned? must you have festooned? must he have festooned? must we have festooned? must you have festooned? must they have festooned?	must I have been festooning? must you have been festooning? must he have been festooning? must we have been festooning? must you have been festooning? must they have been festooning?

Interro-negative form

Simple form	V-ing form
mustn't I festoon? mustn't you festoon? mustn't he festoon? mustn't we festoon? mustn't you festoon? mustn't they festoon?	mustn't I be festooning? mustn't you be festooning? mustn't he be festooning? mustn't we be festooning? mustn't you be festooning? mustn't they be festooning?
Perfect	V-ing perfect
mustn't I have festooned? mustn't you have festooned? mustn't he have festooned? mustn't we have festooned? mustn't you have festooned? mustn't they have festooned?	mustn't I have been festooning? mustn't you have been festooning? mustn't he have been festooning? mustn't we have been festooning? mustn't you have been festooning? mustn't they have been festooning?