English verb conjugation
MUST OYSTER

Regular verb: oyster - oystered - oystered

Affirmation

Simple form	V-ing form
I must oyster you must oyster he must oyster we must oyster you must oyster they must oyster	I must be oystering you must be oystering he must be oystering we must be oystering you must be oystering they must be oystering
Perfect	V-ing perfect
I must have oystered you must have oystered he must have oystered we must have oystered you must have oystered they must have oystered	I must have been oystering you must have been oystering he must have been oystering we must have been oystering you must have been oystering they must have been oystering

Negation

Simple form	V-ing form
I must not oyster you must not oyster he must not oyster we must not oyster you must not oyster they must not oyster	I must not be oystering you must not be oystering he must not be oystering we must not be oystering you must not be oystering they must not be oystering
Perfect	V-ing perfect
I must not have oystered you must not have oystered he must not have oystered we must not have oystered you must not have oystered they must not have oystered	I must not have been oystering you must not have been oystering he must not have been oystering we must not have been oystering you must not have been oystering they must not have been oystering

Interrogative form

Simple form	V-ing form
must I oyster? must you oyster? must he oyster? must we oyster? must you oyster? must they oyster?	must I be oystering? must you be oystering? must he be oystering? must we be oystering? must you be oystering? must they be oystering?
Perfect	V-ing perfect
must I have oystered? must you have oystered? must he have oystered? must we have oystered? must you have oystered? must they have oystered?	must I have been oystering? must you have been oystering? must he have been oystering? must we have been oystering? must you have been oystering? must they have been oystering?

Interro-negative form

Simple form	V-ing form
must I not oyster? must you not oyster? must he not oyster? must we not oyster? must you not oyster? must they not oyster?	must I not be oystering? must you not be oystering? must he not be oystering? must we not be oystering? must you not be oystering? must they not be oystering?
Perfect	V-ing perfect
must I not have oystered? must you not have oystered? must he not have oystered? must we not have oystered? must you not have oystered? must they not have oystered?	must I not have been oystering? must you not have been oystering? must he not have been oystering? must we not have been oystering? must you not have been oystering? must they not have been oystering?