English verb conjugation MUST MAINTAIN

Regular verb: maintain - maintained - maintained

Affirmation

Simple form

I must maintain
you must maintain
she must maintain
we must maintain
you must maintain
they must maintain

V-ing form

I must be maintaining
you must be maintaining
she must be maintaining
we must be maintaining
you must be maintaining
they must be maintaining

Perfect

I must have maintained
you must have maintained
she 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
she must have been maintaining
we must have been maintaining
you must have been maintaining
they must have been maintaining

Negation

Simple form

I must not maintain
you must not maintain
she must not maintain
we must not maintain
you must not maintain
they must not maintain

V-ing form

I must not be maintaining
you must not be maintaining
she must not be maintaining
we must not be maintaining
you must not be maintaining
they must not be maintaining

Perfect

I must not have maintained
you must not have maintained
she must not have maintained
we must not have maintained
you must not have maintained
they must not have maintained

V-ing perfect

I must not have been maintaining
you must not have been maintaining
she must not have been maintaining
we must not have been maintaining
you must not have been maintaining
they must not have been maintaining

Interrogative form

Simple form

must I maintain?
must you maintain?
must she maintain?
must we maintain?
must you maintain?
must they maintain?

V-ing form

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

Perfect

must I have maintained?
must you have maintained?
must she 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 she have been maintaining?
must we have been maintaining?
must you have been maintaining?
must they have been maintaining?

Interro-negative form

Simple form

must I not maintain?
must you not maintain?
must she not maintain?
must we not maintain?
must you not maintain?
must they not maintain?

V-ing form

must I not be maintaining?
must you not be maintaining?
must she not be maintaining?
must we not be maintaining?
must you not be maintaining?
must they not be maintaining?

Perfect

must I not have maintained?
must you not have maintained?
must she not have maintained?
must we not have maintained?
must you not have maintained?
must they not have maintained?

V-ing perfect

must I not have been maintaining?
must you not have been maintaining?
must she not have been maintaining?
must we not have been maintaining?
must you not have been maintaining?
must they not have been maintaining?

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