English verb conjugation
COULD PRIM

Regular verb: prim - primmed - primmed

Affirmation

Simple form	V-ing form
I could prim you could prim she could prim we could prim you could prim they could prim	I could be primming you could be primming she could be primming we could be primming you could be primming they could be primming
Perfect	V-ing perfect
I could have primmed you could have primmed she could have primmed we could have primmed you could have primmed they could have primmed	I could have been primming you could have been primming she could have been primming we could have been primming you could have been primming they could have been primming

Negation

Simple form	V-ing form
I could not prim you could not prim she could not prim we could not prim you could not prim they could not prim	I could not be primming you could not be primming she could not be primming we could not be primming you could not be primming they could not be primming
Perfect	V-ing perfect
I could not have primmed you could not have primmed she could not have primmed we could not have primmed you could not have primmed they could not have primmed	I could not have been primming you could not have been primming she could not have been primming we could not have been primming you could not have been primming they could not have been primming

Interrogative form

Simple form	V-ing form
could I prim? could you prim? could she prim? could we prim? could you prim? could they prim?	could I be primming? could you be primming? could she be primming? could we be primming? could you be primming? could they be primming?
Perfect	V-ing perfect
could I have primmed? could you have primmed? could she have primmed? could we have primmed? could you have primmed? could they have primmed?	could I have been primming? could you have been primming? could she have been primming? could we have been primming? could you have been primming? could they have been primming?

Interro-negative form

Simple form	V-ing form
could I not prim? could you not prim? could she not prim? could we not prim? could you not prim? could they not prim?	could I not be primming? could you not be primming? could she not be primming? could we not be primming? could you not be primming? could they not be primming?
Perfect	V-ing perfect
could I not have primmed? could you not have primmed? could she not have primmed? could we not have primmed? could you not have primmed? could they not have primmed?	could I not have been primming? could you not have been primming? could she not have been primming? could we not have been primming? could you not have been primming? could they not have been primming?