English verb conjugation MUST BIRL

Regular verb: birl - birled - birled

Affirmation

Simple form

I must birl
you must birl
he must birl
we must birl
you must birl
they must birl

V-ing form

I must be birling
you must be birling
he must be birling
we must be birling
you must be birling
they must be birling

Perfect

I must have birled
you must have birled
he must have birled
we must have birled
you must have birled
they must have birled

V-ing perfect

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

Negation

Simple form

I must not birl
you must not birl
he must not birl
we must not birl
you must not birl
they must not birl

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I birl?
must you birl?
must he birl?
must we birl?
must you birl?
must they birl?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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