could festoon
Regular verb: festoon - festooned- festooned

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

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

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

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