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 must not alter
you must not alter
he must not alter
we must not alter
you must not alter
they must not alter

V-ing form

I must not be altering
you must not be altering
he must not be altering
we must not be altering
you must not be altering
they must not be altering

Perfect

I must not have altered
you must not have altered
he must not have altered
we must not have altered
you must not have altered
they must not have altered

V-ing perfect

I must not have been altering
you must not have been altering
he must not have been altering
we must not have been altering
you must not have been altering
they must not 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

must I not alter?
must you not alter?
must he not alter?
must we not alter?
must you not alter?
must they not alter?

V-ing form

must I not be altering?
must you not be altering?
must he not be altering?
must we not be altering?
must you not be altering?
must they not be altering?

Perfect

must I not have altered?
must you not have altered?
must he not have altered?
must we not have altered?
must you not have altered?
must they not have altered?

V-ing perfect

must I not have been altering?
must you not have been altering?
must he not have been altering?
must we not have been altering?
must you not have been altering?
must they not have been altering?