English verb conjugation
COULD NON-PROS

Regular verb: non-pros - non-prosed - non-prosed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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