English verb conjugation
COULD PROSE

Regular verb: prose - prosed - prosed

Affirmation

Simple form	V-ing form
I could prose you could prose he could prose we could prose you could prose they could prose	I could be prosing you could be prosing he could be prosing we could be prosing you could be prosing they could be prosing
Perfect	V-ing perfect
I could have prosed you could have prosed he could have prosed we could have prosed you could have prosed they could have prosed	I could have been prosing you could have been prosing he could have been prosing we could have been prosing you could have been prosing they could have been prosing

Negation

Simple form	V-ing form
I couldn't prose you couldn't prose he couldn't prose we couldn't prose you couldn't prose they couldn't prose	I couldn't be prosing you couldn't be prosing he couldn't be prosing we couldn't be prosing you couldn't be prosing they couldn't be prosing
Perfect	V-ing perfect
I couldn't have prosed you couldn't have prosed he couldn't have prosed we couldn't have prosed you couldn't have prosed they couldn't have prosed	I couldn't have been prosing you couldn't have been prosing he couldn't have been prosing we couldn't have been prosing you couldn't have been prosing they couldn't have been prosing

Interrogative form

Simple form	V-ing form
could I prose? could you prose? could he prose? could we prose? could you prose? could they prose?	could I be prosing? could you be prosing? could he be prosing? could we be prosing? could you be prosing? could they be prosing?
Perfect	V-ing perfect
could I have prosed? could you have prosed? could he have prosed? could we have prosed? could you have prosed? could they have prosed?	could I have been prosing? could you have been prosing? could he have been prosing? could we have been prosing? could you have been prosing? could they have been prosing?

Interro-negative form

Simple form	V-ing form
couldn't I prose? couldn't you prose? couldn't he prose? couldn't we prose? couldn't you prose? couldn't they prose?	couldn't I be prosing? couldn't you be prosing? couldn't he be prosing? couldn't we be prosing? couldn't you be prosing? couldn't they be prosing?
Perfect	V-ing perfect
couldn't I have prosed? couldn't you have prosed? couldn't he have prosed? couldn't we have prosed? couldn't you have prosed? couldn't they have prosed?	couldn't I have been prosing? couldn't you have been prosing? couldn't he have been prosing? couldn't we have been prosing? couldn't you have been prosing? couldn't they have been prosing?