must duet
Verbo regular: duet - dueted- dueted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must duet
you must duet
he must duet
we must duet
you must duet
they must duet 	I must be dueting
you must be dueting
he must be dueting
we must be dueting
you must be dueting
they must be dueting	I must have dueted
you must have dueted
he must have dueted
we must have dueted
you must have dueted
they must have dueted	I must have been dueting
you must have been dueting
he must have been dueting
we must have been dueting
you must have been dueting
they must have been dueting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not duet
you must not duet
he must not duet
we must not duet
you must not duet
they must not duet 	I must not be dueting
you must not be dueting
he must not be dueting
we must not be dueting
you must not be dueting
they must not be dueting	I must not have dueted
you must not have dueted
he must not have dueted
we must not have dueted
you must not have dueted
they must not have dueted	I must not have been dueting
you must not have been dueting
he must not have been dueting
we must not have been dueting
you must not have been dueting
they must not have been dueting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I duet?
must you duet?
must he duet?
must we duet?
must you duet?
must they duet? 	must I be dueting?
must you be dueting?
must he be dueting?
must we be dueting?
must you be dueting?
must they be dueting? 	must I have dueted?
must you have dueted?
must he have dueted?
must we have dueted?
must you have dueted?
must they have dueted? 	must I have been dueting?
must you have been dueting?
must he have been dueting?
must we have been dueting?
must you have been dueting?
must they have been dueting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not duet?
must you not duet?
must he not duet?
must we not duet?
must you not duet?
must they not duet? 	must I not be dueting?
must you not be dueting?
must he not be dueting?
must we not be dueting?
must you not be dueting?
must they not be dueting? 	must I not have dueted?
must you not have dueted?
must he not have dueted?
must we not have dueted?
must you not have dueted?
must they not have dueted? 	must I not have been dueting?
must you not have been dueting?
must he not have been dueting?
must we not have been dueting?
must you not have been dueting?
must they not have been dueting?