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 must not curtain
you must not curtain
he must not curtain
we must not curtain
you must not curtain
they must not curtain

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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