English verb conjugation
SHOULD COUNTERSIGN

Regular verb: countersign - countersigned - countersigned

Affirmation

Simple form	V-ing form
I should countersign you should countersign he should countersign we should countersign you should countersign they should countersign	I should be countersigning you should be countersigning he should be countersigning we should be countersigning you should be countersigning they should be countersigning
Perfect	V-ing perfect
I should have countersigned you should have countersigned he should have countersigned we should have countersigned you should have countersigned they should have countersigned	I should have been countersigning you should have been countersigning he should have been countersigning we should have been countersigning you should have been countersigning they should have been countersigning

Negation

Simple form	V-ing form
I should not countersign you should not countersign he should not countersign we should not countersign you should not countersign they should not countersign	I should not be countersigning you should not be countersigning he should not be countersigning we should not be countersigning you should not be countersigning they should not be countersigning
Perfect	V-ing perfect
I should not have countersigned you should not have countersigned he should not have countersigned we should not have countersigned you should not have countersigned they should not have countersigned	I should not have been countersigning you should not have been countersigning he should not have been countersigning we should not have been countersigning you should not have been countersigning they should not have been countersigning

Interrogative form

Simple form	V-ing form
should I countersign? should you countersign? should he countersign? should we countersign? should you countersign? should they countersign?	should I be countersigning? should you be countersigning? should he be countersigning? should we be countersigning? should you be countersigning? should they be countersigning?
Perfect	V-ing perfect
should I have countersigned? should you have countersigned? should he have countersigned? should we have countersigned? should you have countersigned? should they have countersigned?	should I have been countersigning? should you have been countersigning? should he have been countersigning? should we have been countersigning? should you have been countersigning? should they have been countersigning?

Interro-negative form

Simple form	V-ing form
should I not countersign? should you not countersign? should he not countersign? should we not countersign? should you not countersign? should they not countersign?	should I not be countersigning? should you not be countersigning? should he not be countersigning? should we not be countersigning? should you not be countersigning? should they not be countersigning?
Perfect	V-ing perfect
should I not have countersigned? should you not have countersigned? should he not have countersigned? should we not have countersigned? should you not have countersigned? should they not have countersigned?	should I not have been countersigning? should you not have been countersigning? should he not have been countersigning? should we not have been countersigning? should you not have been countersigning? should they not have been countersigning?