English verb conjugation MUST EXIST

Regular verb: exist - existed - existed

Affirmation

Simple form

I must exist
you must exist
he must exist
we must exist
you must exist
they must exist

V-ing form

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

Perfect

I must have existed
you must have existed
he must have existed
we must have existed
you must have existed
they must have existed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I exist?
must you exist?
must he exist?
must we exist?
must you exist?
must they exist?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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