English verb conjugation MUST BURR

Regular verb: burr - burred - burred

Affirmation

Simple form

I must burr
you must burr
she must burr
we must burr
you must burr
they must burr

V-ing form

I must be burring
you must be burring
she must be burring
we must be burring
you must be burring
they must be burring

Perfect

I must have burred
you must have burred
she must have burred
we must have burred
you must have burred
they must have burred

V-ing perfect

I must have been burring
you must have been burring
she must have been burring
we must have been burring
you must have been burring
they must have been burring

Negation

Simple form

I must not burr
you must not burr
she must not burr
we must not burr
you must not burr
they must not burr

V-ing form

I must not be burring
you must not be burring
she must not be burring
we must not be burring
you must not be burring
they must not be burring

Perfect

I must not have burred
you must not have burred
she must not have burred
we must not have burred
you must not have burred
they must not have burred

V-ing perfect

I must not have been burring
you must not have been burring
she must not have been burring
we must not have been burring
you must not have been burring
they must not have been burring

Interrogative form

Simple form

must I burr?
must you burr?
must she burr?
must we burr?
must you burr?
must they burr?

V-ing form

must I be burring?
must you be burring?
must she be burring?
must we be burring?
must you be burring?
must they be burring?

Perfect

must I have burred?
must you have burred?
must she have burred?
must we have burred?
must you have burred?
must they have burred?

V-ing perfect

must I have been burring?
must you have been burring?
must she have been burring?
must we have been burring?
must you have been burring?
must they have been burring?

Interro-negative form

Simple form

must I not burr?
must you not burr?
must she not burr?
must we not burr?
must you not burr?
must they not burr?

V-ing form

must I not be burring?
must you not be burring?
must she not be burring?
must we not be burring?
must you not be burring?
must they not be burring?

Perfect

must I not have burred?
must you not have burred?
must she not have burred?
must we not have burred?
must you not have burred?
must they not have burred?

V-ing perfect

must I not have been burring?
must you not have been burring?
must she not have been burring?
must we not have been burring?
must you not have been burring?
must they not have been burring?

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