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 must not fail fail
you must not fail fail
he must not fail fail
we must not fail fail
you must not fail fail
they must not fail fail

V-ing form

I must not be fail failing
you must not be fail failing
he must not be fail failing
we must not be fail failing
you must not be fail failing
they must not be fail failing

Perfect

I must not have fail failed
you must not have fail failed
he must not have fail failed
we must not have fail failed
you must not have fail failed
they must not have fail failed

V-ing perfect

I must not have been fail failing
you must not have been fail failing
he must not have been fail failing
we must not have been fail failing
you must not have been fail failing
they must not 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

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

V-ing form

must I not be fail failing?
must you not be fail failing?
must he not be fail failing?
must we not be fail failing?
must you not be fail failing?
must they not be fail failing?

Perfect

must I not have fail failed?
must you not have fail failed?
must he not have fail failed?
must we not have fail failed?
must you not have fail failed?
must they not have fail failed?

V-ing perfect

must I not have been fail failing?
must you not have been fail failing?
must he not have been fail failing?
must we not have been fail failing?
must you not have been fail failing?
must they not have been fail failing?

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