English verb conjugation COULD COUNTERSIGN

Regular verb: countersign - countersigned - countersigned

Affirmation

Simple form

I could countersign
you could countersign
she could countersign
we could countersign
you could countersign
they could countersign

V-ing form

I could be countersigning
you could be countersigning
she could be countersigning
we could be countersigning
you could be countersigning
they could be countersigning

Perfect

I could have countersigned
you could have countersigned
she could have countersigned
we could have countersigned
you could have countersigned
they could have countersigned

V-ing perfect

I could have been countersigning
you could have been countersigning
she could have been countersigning
we could have been countersigning
you could have been countersigning
they could have been countersigning

Negation

Simple form

I couldn't countersign
you couldn't countersign
she couldn't countersign
we couldn't countersign
you couldn't countersign
they couldn't countersign

V-ing form

I couldn't be countersigning
you couldn't be countersigning
she couldn't be countersigning
we couldn't be countersigning
you couldn't be countersigning
they couldn't be countersigning

Perfect

I couldn't have countersigned
you couldn't have countersigned
she couldn't have countersigned
we couldn't have countersigned
you couldn't have countersigned
they couldn't have countersigned

V-ing perfect

I couldn't have been countersigning
you couldn't have been countersigning
she couldn't have been countersigning
we couldn't have been countersigning
you couldn't have been countersigning
they couldn't have been countersigning

Interrogative form

Simple form

could I countersign?
could you countersign?
could she countersign?
could we countersign?
could you countersign?
could they countersign?

V-ing form

could I be countersigning?
could you be countersigning?
could she be countersigning?
could we be countersigning?
could you be countersigning?
could they be countersigning?

Perfect

could I have countersigned?
could you have countersigned?
could she have countersigned?
could we have countersigned?
could you have countersigned?
could they have countersigned?

V-ing perfect

could I have been countersigning?
could you have been countersigning?
could she have been countersigning?
could we have been countersigning?
could you have been countersigning?
could they have been countersigning?

Interro-negative form

Simple form

couldn't I countersign?
couldn't you countersign?
couldn't she countersign?
couldn't we countersign?
couldn't you countersign?
couldn't they countersign?

V-ing form

couldn't I be countersigning?
couldn't you be countersigning?
couldn't she be countersigning?
couldn't we be countersigning?
couldn't you be countersigning?
couldn't they be countersigning?

Perfect

couldn't I have countersigned?
couldn't you have countersigned?
couldn't she have countersigned?
couldn't we have countersigned?
couldn't you have countersigned?
couldn't they have countersigned?

V-ing perfect

couldn't I have been countersigning?
couldn't you have been countersigning?
couldn't she have been countersigning?
couldn't we have been countersigning?
couldn't you have been countersigning?
couldn't they have been countersigning?

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