English verb conjugation MUST ALTER

Regular verb: alter - altered - altered

Affirmation

Simple form

I must alter
you must alter
he must alter
we must alter
you must alter
they must alter

V-ing form

I must be altering
you must be altering
he must be altering
we must be altering
you must be altering
they must be altering

Perfect

I must have altered
you must have altered
he must have altered
we must have altered
you must have altered
they must have altered

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I alter?
must you alter?
must he alter?
must we alter?
must you alter?
must they alter?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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