English verb conjugation
CAN HELM

Regular verb: helm - helmed - helmed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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