could plumpen
Regular verb: plumpen - plumpened- plumpened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could plumpen
you could plumpen
he could plumpen
we could plumpen
you could plumpen
they could plumpen 	I could be plumpening
you could be plumpening
he could be plumpening
we could be plumpening
you could be plumpening
they could be plumpening	I could have plumpened
you could have plumpened
he could have plumpened
we could have plumpened
you could have plumpened
they could have plumpened	I could have been plumpening
you could have been plumpening
he could have been plumpening
we could have been plumpening
you could have been plumpening
they could have been plumpening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't plumpen
you couldn't plumpen
he couldn't plumpen
we couldn't plumpen
you couldn't plumpen
they couldn't plumpen 	I couldn't be plumpening
you couldn't be plumpening
he couldn't be plumpening
we couldn't be plumpening
you couldn't be plumpening
they couldn't be plumpening	I couldn't have plumpened
you couldn't have plumpened
he couldn't have plumpened
we couldn't have plumpened
you couldn't have plumpened
they couldn't have plumpened	I couldn't have been plumpening
you couldn't have been plumpening
he couldn't have been plumpening
we couldn't have been plumpening
you couldn't have been plumpening
they couldn't have been plumpening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I plumpen?
could you plumpen?
could he plumpen?
could we plumpen?
could you plumpen?
could they plumpen? 	could I be plumpening?
could you be plumpening?
could he be plumpening?
could we be plumpening?
could you be plumpening?
could they be plumpening? 	could I have plumpened?
could you have plumpened?
could he have plumpened?
could we have plumpened?
could you have plumpened?
could they have plumpened? 	could I have been plumpening?
could you have been plumpening?
could he have been plumpening?
could we have been plumpening?
could you have been plumpening?
could they have been plumpening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I plumpen?
couldn't you plumpen?
couldn't he plumpen?
couldn't we plumpen?
couldn't you plumpen?
couldn't they plumpen? 	couldn't I be plumpening?
couldn't you be plumpening?
couldn't he be plumpening?
couldn't we be plumpening?
couldn't you be plumpening?
couldn't they be plumpening? 	couldn't I have plumpened?
couldn't you have plumpened?
couldn't he have plumpened?
couldn't we have plumpened?
couldn't you have plumpened?
couldn't they have plumpened? 	couldn't I have been plumpening?
couldn't you have been plumpening?
couldn't he have been plumpening?
couldn't we have been plumpening?
couldn't you have been plumpening?
couldn't they have been plumpening?