English verb conjugation
CAN FESTOON

Regular verb: festoon - festooned - festooned

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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