English verb conjugation MUST COUNTERSIGN

Regular verb: countersign - countersigned - countersigned

Affirmation

Simple form

I must countersign
you must countersign
he must countersign
we must countersign
you must countersign
they must countersign

V-ing form

I must be countersigning
you must be countersigning
he must be countersigning
we must be countersigning
you must be countersigning
they must be countersigning

Perfect

I must have countersigned
you must have countersigned
he must have countersigned
we must have countersigned
you must have countersigned
they must have countersigned

V-ing perfect

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

Negation

Simple form

I must not countersign
you must not countersign
he must not countersign
we must not countersign
you must not countersign
they must not countersign

V-ing form

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

Perfect

I must not have countersigned
you must not have countersigned
he must not have countersigned
we must not have countersigned
you must not have countersigned
they must not have countersigned

V-ing perfect

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

Interrogative form

Simple form

must I countersign?
must you countersign?
must he countersign?
must we countersign?
must you countersign?
must they countersign?

V-ing form

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

Perfect

must I have countersigned?
must you have countersigned?
must he have countersigned?
must we have countersigned?
must you have countersigned?
must they have countersigned?

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

must I not have countersigned?
must you not have countersigned?
must he not have countersigned?
must we not have countersigned?
must you not have countersigned?
must they not have countersigned?

V-ing perfect

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

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