Conjugação do verbo inglês
CAN COUNTERSIGN

Verbo regular: countersign - countersigned - countersigned

Afirmação

Forma simple	Forma com V-ing
I can countersign you can countersign she can countersign we can countersign you can countersign they can countersign	I can be countersigning you can be countersigning she can be countersigning we can be countersigning you can be countersigning they can be countersigning
Perfeito	Perfeito com V-ing
I can have countersigned you can have countersigned she can have countersigned we can have countersigned you can have countersigned they can have countersigned	I can have been countersigning you can have been countersigning she can have been countersigning we can have been countersigning you can have been countersigning they can have been countersigning

Negação

Forma simple	Forma com V-ing
I cannot countersign you cannot countersign she cannot countersign we cannot countersign you cannot countersign they cannot countersign	I cannot be countersigning you cannot be countersigning she cannot be countersigning we cannot be countersigning you cannot be countersigning they cannot be countersigning
Perfeito	Perfeito com V-ing
I cannot have countersigned you cannot have countersigned she cannot have countersigned we cannot have countersigned you cannot have countersigned they cannot have countersigned	I cannot have been countersigning you cannot have been countersigning she cannot have been countersigning we cannot have been countersigning you cannot have been countersigning they cannot have been countersigning

Forma interrogativa

Forma simple	Forma com V-ing
can I countersign? can you countersign? can she countersign? can we countersign? can you countersign? can they countersign?	can I be countersigning? can you be countersigning? can she be countersigning? can we be countersigning? can you be countersigning? can they be countersigning?
Perfeito	Perfeito com V-ing
can I have countersigned? can you have countersigned? can she have countersigned? can we have countersigned? can you have countersigned? can they have countersigned?	can I have been countersigning? can you have been countersigning? can she have been countersigning? can we have been countersigning? can you have been countersigning? can they have been countersigning?

Forma interro-Negação

Forma simple	Forma com V-ing
can I not countersign? can you not countersign? can she not countersign? can we not countersign? can you not countersign? can they not countersign?	can I not be countersigning? can you not be countersigning? can she not be countersigning? can we not be countersigning? can you not be countersigning? can they not be countersigning?
Perfeito	Perfeito com V-ing
can I not have countersigned? can you not have countersigned? can she not have countersigned? can we not have countersigned? can you not have countersigned? can they not have countersigned?	can I not have been countersigning? can you not have been countersigning? can she not have been countersigning? can we not have been countersigning? can you not have been countersigning? can they not have been countersigning?