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 mustn't oyster you mustn't oyster he mustn't oyster we mustn't oyster you mustn't oyster they mustn't oyster	I mustn't be oystering you mustn't be oystering he mustn't be oystering we mustn't be oystering you mustn't be oystering they mustn't be oystering
Perfect	V-ing perfect
I mustn't have oystered you mustn't have oystered he mustn't have oystered we mustn't have oystered you mustn't have oystered they mustn't have oystered	I mustn't have been oystering you mustn't have been oystering he mustn't have been oystering we mustn't have been oystering you mustn't have been oystering they mustn't 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
mustn't I oyster? mustn't you oyster? mustn't he oyster? mustn't we oyster? mustn't you oyster? mustn't they oyster?	mustn't I be oystering? mustn't you be oystering? mustn't he be oystering? mustn't we be oystering? mustn't you be oystering? mustn't they be oystering?
Perfect	V-ing perfect
mustn't I have oystered? mustn't you have oystered? mustn't he have oystered? mustn't we have oystered? mustn't you have oystered? mustn't they have oystered?	mustn't I have been oystering? mustn't you have been oystering? mustn't he have been oystering? mustn't we have been oystering? mustn't you have been oystering? mustn't they have been oystering?