English verb conjugation MUST RUFF

Regular verb: ruff - ruffed - ruffed

Affirmation

Simple form

I must ruff
you must ruff
he must ruff
we must ruff
you must ruff
they must ruff

V-ing form

I must be ruffing
you must be ruffing
he must be ruffing
we must be ruffing
you must be ruffing
they must be ruffing

Perfect

I must have ruffed
you must have ruffed
he must have ruffed
we must have ruffed
you must have ruffed
they must have ruffed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I ruff?
must you ruff?
must he ruff?
must we ruff?
must you ruff?
must they ruff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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