English verb conjugation MUST KNUCKLE

Regular verb: knuckle - knuckled - knuckled

Affirmation

Simple form

I must knuckle
you must knuckle
he must knuckle
we must knuckle
you must knuckle
they must knuckle

V-ing form

I must be knuckling
you must be knuckling
he must be knuckling
we must be knuckling
you must be knuckling
they must be knuckling

Perfect

I must have knuckled
you must have knuckled
he must have knuckled
we must have knuckled
you must have knuckled
they must have knuckled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I knuckle?
must you knuckle?
must he knuckle?
must we knuckle?
must you knuckle?
must they knuckle?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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