English verb conjugation MUST BE

Irregular verb: be - was/were - been

Affirmation

Simple form

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

V-ing form

I must be being
you must be being
he must be being
we must be being
you must be being
they must be being

Perfect

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

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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