English verb conjugation MUST FAIL FAIL

Regular verb: fail fail - fail failed - fail failed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form

I must fail fail
you must fail fail
he must fail fail
we must fail fail
you must fail fail
they must fail fail

V-ing form

I must be fail failing
you must be fail failing
he must be fail failing
we must be fail failing
you must be fail failing
they must be fail failing

Perfect

I must have fail failed
you must have fail failed
he must have fail failed
we must have fail failed
you must have fail failed
they must have fail failed

V-ing perfect

I must have been fail failing
you must have been fail failing
he must have been fail failing
we must have been fail failing
you must have been fail failing
they must have been fail failing

Negation

Simple form

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

V-ing form

I mustn't be fail failing
you mustn't be fail failing
he mustn't be fail failing
we mustn't be fail failing
you mustn't be fail failing
they mustn't be fail failing

Perfect

I mustn't have fail failed
you mustn't have fail failed
he mustn't have fail failed
we mustn't have fail failed
you mustn't have fail failed
they mustn't have fail failed

V-ing perfect

I mustn't have been fail failing
you mustn't have been fail failing
he mustn't have been fail failing
we mustn't have been fail failing
you mustn't have been fail failing
they mustn't have been fail failing

Interrogative form

Simple form

must I fail fail?
must you fail fail?
must he fail fail?
must we fail fail?
must you fail fail?
must they fail fail?

V-ing form

must I be fail failing?
must you be fail failing?
must he be fail failing?
must we be fail failing?
must you be fail failing?
must they be fail failing?

Perfect

must I have fail failed?
must you have fail failed?
must he have fail failed?
must we have fail failed?
must you have fail failed?
must they have fail failed?

V-ing perfect

must I have been fail failing?
must you have been fail failing?
must he have been fail failing?
must we have been fail failing?
must you have been fail failing?
must they have been fail failing?

Interro-negative form

Simple form

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

V-ing form

mustn't I be fail failing?
mustn't you be fail failing?
mustn't he be fail failing?
mustn't we be fail failing?
mustn't you be fail failing?
mustn't they be fail failing?

Perfect

mustn't I have fail failed?
mustn't you have fail failed?
mustn't he have fail failed?
mustn't we have fail failed?
mustn't you have fail failed?
mustn't they have fail failed?

V-ing perfect

mustn't I have been fail failing?
mustn't you have been fail failing?
mustn't he have been fail failing?
mustn't we have been fail failing?
mustn't you have been fail failing?
mustn't they have been fail failing?

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