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 mustn't countersign
you mustn't countersign
he mustn't countersign
we mustn't countersign
you mustn't countersign
they mustn't countersign

V-ing form

I mustn't be countersigning
you mustn't be countersigning
he mustn't be countersigning
we mustn't be countersigning
you mustn't be countersigning
they mustn't be countersigning

Perfect

I mustn't have countersigned
you mustn't have countersigned
he mustn't have countersigned
we mustn't have countersigned
you mustn't have countersigned
they mustn't have countersigned

V-ing perfect

I mustn't have been countersigning
you mustn't have been countersigning
he mustn't have been countersigning
we mustn't have been countersigning
you mustn't have been countersigning
they mustn't 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

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

V-ing form

mustn't I be countersigning?
mustn't you be countersigning?
mustn't he be countersigning?
mustn't we be countersigning?
mustn't you be countersigning?
mustn't they be countersigning?

Perfect

mustn't I have countersigned?
mustn't you have countersigned?
mustn't he have countersigned?
mustn't we have countersigned?
mustn't you have countersigned?
mustn't they have countersigned?

V-ing perfect

mustn't I have been countersigning?
mustn't you have been countersigning?
mustn't he have been countersigning?
mustn't we have been countersigning?
mustn't you have been countersigning?
mustn't they have been countersigning?

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