English verb conjugation MUST BACKFIT

Irregular verb: backfit - backfit, backfitted - backfit, backfitted

Affirmation

Simple form

I must backfit
you must backfit
he must backfit
we must backfit
you must backfit
they must backfit

V-ing form

I must be backfiting
you must be backfiting
he must be backfiting
we must be backfiting
you must be backfiting
they must be backfiting

Perfect

I must have backfit, backfitted
you must have backfit, backfitted
he must have backfit, backfitted
we must have backfit, backfitted
you must have backfit, backfitted
they must have backfit, backfitted

V-ing perfect

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

Negation

Simple form

I must not backfit
you must not backfit
he must not backfit
we must not backfit
you must not backfit
they must not backfit

V-ing form

I must not be backfiting
you must not be backfiting
he must not be backfiting
we must not be backfiting
you must not be backfiting
they must not be backfiting

Perfect

I must not have backfit, backfitted
you must not have backfit, backfitted
he must not have backfit, backfitted
we must not have backfit, backfitted
you must not have backfit, backfitted
they must not have backfit, backfitted

V-ing perfect

I must not have been backfiting
you must not have been backfiting
he must not have been backfiting
we must not have been backfiting
you must not have been backfiting
they must not have been backfiting

Interrogative form

Simple form

must I backfit?
must you backfit?
must he backfit?
must we backfit?
must you backfit?
must they backfit?

V-ing form

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

Perfect

must I have backfit, backfitted?
must you have backfit, backfitted?
must he have backfit, backfitted?
must we have backfit, backfitted?
must you have backfit, backfitted?
must they have backfit, backfitted?

V-ing perfect

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

Interro-negative form

Simple form

must I not backfit?
must you not backfit?
must he not backfit?
must we not backfit?
must you not backfit?
must they not backfit?

V-ing form

must I not be backfiting?
must you not be backfiting?
must he not be backfiting?
must we not be backfiting?
must you not be backfiting?
must they not be backfiting?

Perfect

must I not have backfit, backfitted?
must you not have backfit, backfitted?
must he not have backfit, backfitted?
must we not have backfit, backfitted?
must you not have backfit, backfitted?
must they not have backfit, backfitted?

V-ing perfect

must I not have been backfiting?
must you not have been backfiting?
must he not have been backfiting?
must we not have been backfiting?
must you not have been backfiting?
must they not have been backfiting?

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