English verb conjugation
CAN DUEL

Regular verb: duel - dueled - dueled

Affirmation

Simple form	V-ing form
I can duel you can duel she can duel we can duel you can duel they can duel	I can be dueling you can be dueling she can be dueling we can be dueling you can be dueling they can be dueling
Perfect	V-ing perfect
I can have dueled you can have dueled she can have dueled we can have dueled you can have dueled they can have dueled	I can have been dueling you can have been dueling she can have been dueling we can have been dueling you can have been dueling they can have been dueling

Negation

Simple form	V-ing form
I can't duel you can't duel she can't duel we can't duel you can't duel they can't duel	I can't be dueling you can't be dueling she can't be dueling we can't be dueling you can't be dueling they can't be dueling
Perfect	V-ing perfect
I can't have dueled you can't have dueled she can't have dueled we can't have dueled you can't have dueled they can't have dueled	I can't have been dueling you can't have been dueling she can't have been dueling we can't have been dueling you can't have been dueling they can't have been dueling

Interrogative form

Simple form	V-ing form
can I duel? can you duel? can she duel? can we duel? can you duel? can they duel?	can I be dueling? can you be dueling? can she be dueling? can we be dueling? can you be dueling? can they be dueling?
Perfect	V-ing perfect
can I have dueled? can you have dueled? can she have dueled? can we have dueled? can you have dueled? can they have dueled?	can I have been dueling? can you have been dueling? can she have been dueling? can we have been dueling? can you have been dueling? can they have been dueling?

Interro-negative form

Simple form	V-ing form
can't I duel? can't you duel? can't she duel? can't we duel? can't you duel? can't they duel?	can't I be dueling? can't you be dueling? can't she be dueling? can't we be dueling? can't you be dueling? can't they be dueling?
Perfect	V-ing perfect
can't I have dueled? can't you have dueled? can't she have dueled? can't we have dueled? can't you have dueled? can't they have dueled?	can't I have been dueling? can't you have been dueling? can't she have been dueling? can't we have been dueling? can't you have been dueling? can't they have been dueling?