must duel
Verbo regular: duel - dueled- dueled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must duel
you must duel
he must duel
we must duel
you must duel
they must duel 	I must be dueling
you must be dueling
he must be dueling
we must be dueling
you must be dueling
they must be dueling	I must have dueled
you must have dueled
he must have dueled
we must have dueled
you must have dueled
they must have dueled	I must have been dueling
you must have been dueling
he must have been dueling
we must have been dueling
you must have been dueling
they must have been dueling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not duel
you must not duel
he must not duel
we must not duel
you must not duel
they must not duel 	I must not be dueling
you must not be dueling
he must not be dueling
we must not be dueling
you must not be dueling
they must not be dueling	I must not have dueled
you must not have dueled
he must not have dueled
we must not have dueled
you must not have dueled
they must not have dueled	I must not have been dueling
you must not have been dueling
he must not have been dueling
we must not have been dueling
you must not have been dueling
they must not have been dueling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I duel?
must you duel?
must he duel?
must we duel?
must you duel?
must they duel? 	must I be dueling?
must you be dueling?
must he be dueling?
must we be dueling?
must you be dueling?
must they be dueling? 	must I have dueled?
must you have dueled?
must he have dueled?
must we have dueled?
must you have dueled?
must they have dueled? 	must I have been dueling?
must you have been dueling?
must he have been dueling?
must we have been dueling?
must you have been dueling?
must they have been dueling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not duel?
must you not duel?
must he not duel?
must we not duel?
must you not duel?
must they not duel? 	must I not be dueling?
must you not be dueling?
must he not be dueling?
must we not be dueling?
must you not be dueling?
must they not be dueling? 	must I not have dueled?
must you not have dueled?
must he not have dueled?
must we not have dueled?
must you not have dueled?
must they not have dueled? 	must I not have been dueling?
must you not have been dueling?
must he not have been dueling?
must we not have been dueling?
must you not have been dueling?
must they not have been dueling?