English verb conjugation
COULD PLUMPEN

Regular verb: plumpen - plumpened - plumpened

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?