English verb conjugation MUST CURTAIN

Regular verb: curtain - curtained - curtained

Affirmation

Simple form

I must curtain
you must curtain
he must curtain
we must curtain
you must curtain
they must curtain

V-ing form

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

Perfect

I must have curtained
you must have curtained
he must have curtained
we must have curtained
you must have curtained
they must have curtained

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I curtain?
must you curtain?
must he curtain?
must we curtain?
must you curtain?
must they curtain?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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