English verb conjugation
COULD CULM

Regular verb: culm - culmed - culmed

Affirmation

Simple form	V-ing form
I could culm you could culm he could culm we could culm you could culm they could culm	I could be culming you could be culming he could be culming we could be culming you could be culming they could be culming
Perfect	V-ing perfect
I could have culmed you could have culmed he could have culmed we could have culmed you could have culmed they could have culmed	I could have been culming you could have been culming he could have been culming we could have been culming you could have been culming they could have been culming

Negation

Simple form	V-ing form
I could not culm you could not culm he could not culm we could not culm you could not culm they could not culm	I could not be culming you could not be culming he could not be culming we could not be culming you could not be culming they could not be culming
Perfect	V-ing perfect
I could not have culmed you could not have culmed he could not have culmed we could not have culmed you could not have culmed they could not have culmed	I could not have been culming you could not have been culming he could not have been culming we could not have been culming you could not have been culming they could not have been culming

Interrogative form

Simple form	V-ing form
could I culm? could you culm? could he culm? could we culm? could you culm? could they culm?	could I be culming? could you be culming? could he be culming? could we be culming? could you be culming? could they be culming?
Perfect	V-ing perfect
could I have culmed? could you have culmed? could he have culmed? could we have culmed? could you have culmed? could they have culmed?	could I have been culming? could you have been culming? could he have been culming? could we have been culming? could you have been culming? could they have been culming?

Interro-negative form

Simple form	V-ing form
could I not culm? could you not culm? could he not culm? could we not culm? could you not culm? could they not culm?	could I not be culming? could you not be culming? could he not be culming? could we not be culming? could you not be culming? could they not be culming?
Perfect	V-ing perfect
could I not have culmed? could you not have culmed? could he not have culmed? could we not have culmed? could you not have culmed? could they not have culmed?	could I not have been culming? could you not have been culming? could he not have been culming? could we not have been culming? could you not have been culming? could they not have been culming?