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 can't helm you can't helm he can't helm we can't helm you can't helm they can't helm	I can't be helming you can't be helming he can't be helming we can't be helming you can't be helming they can't be helming
Perfect	V-ing perfect
I can't have helmed you can't have helmed he can't have helmed we can't have helmed you can't have helmed they can't have helmed	I can't have been helming you can't have been helming he can't have been helming we can't have been helming you can't have been helming they can't 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't I helm? can't you helm? can't he helm? can't we helm? can't you helm? can't they helm?	can't I be helming? can't you be helming? can't he be helming? can't we be helming? can't you be helming? can't they be helming?
Perfect	V-ing perfect
can't I have helmed? can't you have helmed? can't he have helmed? can't we have helmed? can't you have helmed? can't they have helmed?	can't I have been helming? can't you have been helming? can't he have been helming? can't we have been helming? can't you have been helming? can't they have been helming?