English verb conjugation
MUST REMAIN

Regular verb: remain - remained - remained

Affirmation

Simple form	V-ing form
I must remain you must remain she must remain we must remain you must remain they must remain	I must be remaining you must be remaining she must be remaining we must be remaining you must be remaining they must be remaining
Perfect	V-ing perfect
I must have remained you must have remained she must have remained we must have remained you must have remained they must have remained	I must have been remaining you must have been remaining she must have been remaining we must have been remaining you must have been remaining they must have been remaining

Negation

Simple form	V-ing form
I mustn't remain you mustn't remain she mustn't remain we mustn't remain you mustn't remain they mustn't remain	I mustn't be remaining you mustn't be remaining she mustn't be remaining we mustn't be remaining you mustn't be remaining they mustn't be remaining
Perfect	V-ing perfect
I mustn't have remained you mustn't have remained she mustn't have remained we mustn't have remained you mustn't have remained they mustn't have remained	I mustn't have been remaining you mustn't have been remaining she mustn't have been remaining we mustn't have been remaining you mustn't have been remaining they mustn't have been remaining

Interrogative form

Simple form	V-ing form
must I remain? must you remain? must she remain? must we remain? must you remain? must they remain?	must I be remaining? must you be remaining? must she be remaining? must we be remaining? must you be remaining? must they be remaining?
Perfect	V-ing perfect
must I have remained? must you have remained? must she have remained? must we have remained? must you have remained? must they have remained?	must I have been remaining? must you have been remaining? must she have been remaining? must we have been remaining? must you have been remaining? must they have been remaining?

Interro-negative form

Simple form	V-ing form
mustn't I remain? mustn't you remain? mustn't she remain? mustn't we remain? mustn't you remain? mustn't they remain?	mustn't I be remaining? mustn't you be remaining? mustn't she be remaining? mustn't we be remaining? mustn't you be remaining? mustn't they be remaining?
Perfect	V-ing perfect
mustn't I have remained? mustn't you have remained? mustn't she have remained? mustn't we have remained? mustn't you have remained? mustn't they have remained?	mustn't I have been remaining? mustn't you have been remaining? mustn't she have been remaining? mustn't we have been remaining? mustn't you have been remaining? mustn't they have been remaining?