English verb conjugation MUST RUFF

Regular verb: ruff - ruffed - ruffed

Affirmation

Simple form

I must ruff
you must ruff
she must ruff
we must ruff
you must ruff
they must ruff

V-ing form

I must be ruffing
you must be ruffing
she must be ruffing
we must be ruffing
you must be ruffing
they must be ruffing

Perfect

I must have ruffed
you must have ruffed
she 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
she must have been ruffing
we must have been ruffing
you must have been ruffing
they must have been ruffing

Negation

Simple form

I must not ruff
you must not ruff
she must not ruff
we must not ruff
you must not ruff
they must not ruff

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I ruff?
must you ruff?
must she ruff?
must we ruff?
must you ruff?
must they ruff?

V-ing form

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

Perfect

must I have ruffed?
must you have ruffed?
must she 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 she have been ruffing?
must we have been ruffing?
must you have been ruffing?
must they have been ruffing?

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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