English verb conjugation MUST SKIRL

Regular verb: skirl - skirled - skirled

Affirmation

Simple form

I must skirl
you must skirl
he must skirl
we must skirl
you must skirl
they must skirl

V-ing form

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

Perfect

I must have skirled
you must have skirled
he must have skirled
we must have skirled
you must have skirled
they must have skirled

V-ing perfect

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

Negation

Simple form

I must not skirl
you must not skirl
he must not skirl
we must not skirl
you must not skirl
they must not skirl

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I skirl?
must you skirl?
must he skirl?
must we skirl?
must you skirl?
must they skirl?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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