English verb conjugation MUST BACKFIRE

Regular verb: backfire - backfired - backfired

Affirmation

Simple form

I must backfire
you must backfire
she must backfire
we must backfire
you must backfire
they must backfire

V-ing form

I must be backfiring
you must be backfiring
she must be backfiring
we must be backfiring
you must be backfiring
they must be backfiring

Perfect

I must have backfired
you must have backfired
she must have backfired
we must have backfired
you must have backfired
they must have backfired

V-ing perfect

I must have been backfiring
you must have been backfiring
she must have been backfiring
we must have been backfiring
you must have been backfiring
they must have been backfiring

Negation

Simple form

I mustn't backfire
you mustn't backfire
she mustn't backfire
we mustn't backfire
you mustn't backfire
they mustn't backfire

V-ing form

I mustn't be backfiring
you mustn't be backfiring
she mustn't be backfiring
we mustn't be backfiring
you mustn't be backfiring
they mustn't be backfiring

Perfect

I mustn't have backfired
you mustn't have backfired
she mustn't have backfired
we mustn't have backfired
you mustn't have backfired
they mustn't have backfired

V-ing perfect

I mustn't have been backfiring
you mustn't have been backfiring
she mustn't have been backfiring
we mustn't have been backfiring
you mustn't have been backfiring
they mustn't have been backfiring

Interrogative form

Simple form

must I backfire?
must you backfire?
must she backfire?
must we backfire?
must you backfire?
must they backfire?

V-ing form

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

Perfect

must I have backfired?
must you have backfired?
must she have backfired?
must we have backfired?
must you have backfired?
must they have backfired?

V-ing perfect

must I have been backfiring?
must you have been backfiring?
must she have been backfiring?
must we have been backfiring?
must you have been backfiring?
must they have been backfiring?

Interro-negative form

Simple form

mustn't I backfire?
mustn't you backfire?
mustn't she backfire?
mustn't we backfire?
mustn't you backfire?
mustn't they backfire?

V-ing form

mustn't I be backfiring?
mustn't you be backfiring?
mustn't she be backfiring?
mustn't we be backfiring?
mustn't you be backfiring?
mustn't they be backfiring?

Perfect

mustn't I have backfired?
mustn't you have backfired?
mustn't she have backfired?
mustn't we have backfired?
mustn't you have backfired?
mustn't they have backfired?

V-ing perfect

mustn't I have been backfiring?
mustn't you have been backfiring?
mustn't she have been backfiring?
mustn't we have been backfiring?
mustn't you have been backfiring?
mustn't they have been backfiring?

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