English verb conjugation
MUST DUET

Regular verb: duet - dueted - dueted

Affirmation

Simple form	V-ing form
I must duet you must duet she must duet we must duet you must duet they must duet	I must be dueting you must be dueting she must be dueting we must be dueting you must be dueting they must be dueting
Perfect	V-ing perfect
I must have dueted you must have dueted she 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 she must have been dueting we must have been dueting you must have been dueting they must have been dueting

Negation

Simple form	V-ing form
I must not duet you must not duet she 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 she must not be dueting we must not be dueting you must not be dueting they must not be dueting
Perfect	V-ing perfect
I must not have dueted you must not have dueted she 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 she must not have been dueting we must not have been dueting you must not have been dueting they must not have been dueting

Interrogative form

Simple form	V-ing form
must I duet? must you duet? must she duet? must we duet? must you duet? must they duet?	must I be dueting? must you be dueting? must she be dueting? must we be dueting? must you be dueting? must they be dueting?
Perfect	V-ing perfect
must I have dueted? must you have dueted? must she 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 she have been dueting? must we have been dueting? must you have been dueting? must they have been dueting?

Interro-negative form

Simple form	V-ing form
must I not duet? must you not duet? must she 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 she not be dueting? must we not be dueting? must you not be dueting? must they not be dueting?
Perfect	V-ing perfect
must I not have dueted? must you not have dueted? must she 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 she not have been dueting? must we not have been dueting? must you not have been dueting? must they not have been dueting?