English verb conjugation MUST BURR

Regular verb: burr - burred - burred

Affirmation

Simple form

I must burr
you must burr
he must burr
we must burr
you must burr
they must burr

V-ing form

I must be burring
you must be burring
he must be burring
we must be burring
you must be burring
they must be burring

Perfect

I must have burred
you must have burred
he 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
he must have been burring
we must have been burring
you must have been burring
they must have been burring

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I burr?
must you burr?
must he burr?
must we burr?
must you burr?
must they burr?

V-ing form

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

Perfect

must I have burred?
must you have burred?
must he 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 he have been burring?
must we have been burring?
must you have been burring?
must they have been burring?

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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