English verb conjugation MUST PREOCCUPY

Regular verb: preoccupy - preoccupied - preoccupied

Affirmation

Simple form

I must preoccupy
you must preoccupy
he must preoccupy
we must preoccupy
you must preoccupy
they must preoccupy

V-ing form

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

Perfect

I must have preoccupied
you must have preoccupied
he must have preoccupied
we must have preoccupied
you must have preoccupied
they must have preoccupied

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I preoccupy?
must you preoccupy?
must he preoccupy?
must we preoccupy?
must you preoccupy?
must they preoccupy?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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