English verb conjugation
COULD HELM

Regular verb: helm - helmed - helmed

Affirmation

Simple form	V-ing form
I could helm you could helm he could helm we could helm you could helm they could helm	I could be helming you could be helming he could be helming we could be helming you could be helming they could be helming
Perfect	V-ing perfect
I could have helmed you could have helmed he could have helmed we could have helmed you could have helmed they could have helmed	I could have been helming you could have been helming he could have been helming we could have been helming you could have been helming they could have been helming

Negation

Simple form	V-ing form
I could not helm you could not helm he could not helm we could not helm you could not helm they could not helm	I could not be helming you could not be helming he could not be helming we could not be helming you could not be helming they could not be helming
Perfect	V-ing perfect
I could not have helmed you could not have helmed he could not have helmed we could not have helmed you could not have helmed they could not have helmed	I could not have been helming you could not have been helming he could not have been helming we could not have been helming you could not have been helming they could not have been helming

Interrogative form

Simple form	V-ing form
could I helm? could you helm? could he helm? could we helm? could you helm? could they helm?	could I be helming? could you be helming? could he be helming? could we be helming? could you be helming? could they be helming?
Perfect	V-ing perfect
could I have helmed? could you have helmed? could he have helmed? could we have helmed? could you have helmed? could they have helmed?	could I have been helming? could you have been helming? could he have been helming? could we have been helming? could you have been helming? could they have been helming?

Interro-negative form

Simple form	V-ing form
could I not helm? could you not helm? could he not helm? could we not helm? could you not helm? could they not helm?	could I not be helming? could you not be helming? could he not be helming? could we not be helming? could you not be helming? could they not be helming?
Perfect	V-ing perfect
could I not have helmed? could you not have helmed? could he not have helmed? could we not have helmed? could you not have helmed? could they not have helmed?	could I not have been helming? could you not have been helming? could he not have been helming? could we not have been helming? could you not have been helming? could they not have been helming?