English verb conjugation MUST MAINTAIN

Regular verb: maintain - maintained - maintained

Affirmation

Simple form

I must maintain
you must maintain
he must maintain
we must maintain
you must maintain
they must maintain

V-ing form

I must be maintaining
you must be maintaining
he must be maintaining
we must be maintaining
you must be maintaining
they must be maintaining

Perfect

I must have maintained
you must have maintained
he must have maintained
we must have maintained
you must have maintained
they must have maintained

V-ing perfect

I must have been maintaining
you must have been maintaining
he must have been maintaining
we must have been maintaining
you must have been maintaining
they must have been maintaining

Negation

Simple form

I mustn't maintain
you mustn't maintain
he mustn't maintain
we mustn't maintain
you mustn't maintain
they mustn't maintain

V-ing form

I mustn't be maintaining
you mustn't be maintaining
he mustn't be maintaining
we mustn't be maintaining
you mustn't be maintaining
they mustn't be maintaining

Perfect

I mustn't have maintained
you mustn't have maintained
he mustn't have maintained
we mustn't have maintained
you mustn't have maintained
they mustn't have maintained

V-ing perfect

I mustn't have been maintaining
you mustn't have been maintaining
he mustn't have been maintaining
we mustn't have been maintaining
you mustn't have been maintaining
they mustn't have been maintaining

Interrogative form

Simple form

must I maintain?
must you maintain?
must he maintain?
must we maintain?
must you maintain?
must they maintain?

V-ing form

must I be maintaining?
must you be maintaining?
must he be maintaining?
must we be maintaining?
must you be maintaining?
must they be maintaining?

Perfect

must I have maintained?
must you have maintained?
must he have maintained?
must we have maintained?
must you have maintained?
must they have maintained?

V-ing perfect

must I have been maintaining?
must you have been maintaining?
must he have been maintaining?
must we have been maintaining?
must you have been maintaining?
must they have been maintaining?

Interro-negative form

Simple form

mustn't I maintain?
mustn't you maintain?
mustn't he maintain?
mustn't we maintain?
mustn't you maintain?
mustn't they maintain?

V-ing form

mustn't I be maintaining?
mustn't you be maintaining?
mustn't he be maintaining?
mustn't we be maintaining?
mustn't you be maintaining?
mustn't they be maintaining?

Perfect

mustn't I have maintained?
mustn't you have maintained?
mustn't he have maintained?
mustn't we have maintained?
mustn't you have maintained?
mustn't they have maintained?

V-ing perfect

mustn't I have been maintaining?
mustn't you have been maintaining?
mustn't he have been maintaining?
mustn't we have been maintaining?
mustn't you have been maintaining?
mustn't they have been maintaining?

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