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female gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to

English verb conjugation MUST CERTIFY

Regular verb: certify - certified - certified


Affirmation

Simple form
I must certify
you must certify
he must certify
we must certify
you must certify
they must certify
V-ing form
I must be certifying
you must be certifying
he must be certifying
we must be certifying
you must be certifying
they must be certifying
Perfect
I must have certified
you must have certified
he must have certified
we must have certified
you must have certified
they must have certified
V-ing perfect
I must have been certifying
you must have been certifying
he must have been certifying
we must have been certifying
you must have been certifying
they must have been certifying

Negation

Simple form
I must not certify
you must not certify
he must not certify
we must not certify
you must not certify
they must not certify
V-ing form
I must not be certifying
you must not be certifying
he must not be certifying
we must not be certifying
you must not be certifying
they must not be certifying
Perfect
I must not have certified
you must not have certified
he must not have certified
we must not have certified
you must not have certified
they must not have certified
V-ing perfect
I must not have been certifying
you must not have been certifying
he must not have been certifying
we must not have been certifying
you must not have been certifying
they must not have been certifying

Interrogative form

Simple form
must I certify?
must you certify?
must he certify?
must we certify?
must you certify?
must they certify?
V-ing form
must I be certifying?
must you be certifying?
must he be certifying?
must we be certifying?
must you be certifying?
must they be certifying?
Perfect
must I have certified?
must you have certified?
must he have certified?
must we have certified?
must you have certified?
must they have certified?
V-ing perfect
must I have been certifying?
must you have been certifying?
must he have been certifying?
must we have been certifying?
must you have been certifying?
must they have been certifying?

Interro-negative form

Simple form
must I not certify?
must you not certify?
must he not certify?
must we not certify?
must you not certify?
must they not certify?
V-ing form
must I not be certifying?
must you not be certifying?
must he not be certifying?
must we not be certifying?
must you not be certifying?
must they not be certifying?
Perfect
must I not have certified?
must you not have certified?
must he not have certified?
must we not have certified?
must you not have certified?
must they not have certified?
V-ing perfect
must I not have been certifying?
must you not have been certifying?
must he not have been certifying?
must we not have been certifying?
must you not have been certifying?
must they not have been certifying?