English verb conjugation
SHOULD COUNTERSIGN

Regular verb: countersign - countersigned - countersigned

Affirmation

Simple form	V-ing form
I'd countersign you'd countersign she'd countersign we'd countersign you'd countersign they'd countersign	I'd be countersigning you'd be countersigning she'd be countersigning we'd be countersigning you'd be countersigning they'd be countersigning
Perfect	V-ing perfect
I should've countersigned you should've countersigned she should've countersigned we should've countersigned you should've countersigned they should've countersigned	I should've been countersigning you should've been countersigning she should've been countersigning we should've been countersigning you should've been countersigning they should've been countersigning

Negation

Simple form	V-ing form
I shouldn't countersign you shouldn't countersign she shouldn't countersign we shouldn't countersign you shouldn't countersign they shouldn't countersign	I shouldn't be countersigning you shouldn't be countersigning she shouldn't be countersigning we shouldn't be countersigning you shouldn't be countersigning they shouldn't be countersigning
Perfect	V-ing perfect
I shouldn't have countersigned you shouldn't have countersigned she shouldn't have countersigned we shouldn't have countersigned you shouldn't have countersigned they shouldn't have countersigned	I shouldn't have been countersigning you shouldn't have been countersigning she shouldn't have been countersigning we shouldn't have been countersigning you shouldn't have been countersigning they shouldn't have been countersigning

Interrogative form

Simple form	V-ing form
should I countersign? should you countersign? should she countersign? should we countersign? should you countersign? should they countersign?	should I be countersigning? should you be countersigning? should she 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 she 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 she 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
shouldn't I countersign? shouldn't you countersign? shouldn't she countersign? shouldn't we countersign? shouldn't you countersign? shouldn't they countersign?	shouldn't I be countersigning? shouldn't you be countersigning? shouldn't she be countersigning? shouldn't we be countersigning? shouldn't you be countersigning? shouldn't they be countersigning?
Perfect	V-ing perfect
shouldn't I have countersigned? shouldn't you have countersigned? shouldn't she have countersigned? shouldn't we have countersigned? shouldn't you have countersigned? shouldn't they have countersigned?	shouldn't I have been countersigning? shouldn't you have been countersigning? shouldn't she have been countersigning? shouldn't we have been countersigning? shouldn't you have been countersigning? shouldn't they have been countersigning?