Conjugação do verbo inglês
CAN COUNTERSIGN

Verbo regular: countersign - countersigned - countersigned

Afirmação

Forma simple	Forma com V-ing
I can countersign you can countersign he can countersign we can countersign you can countersign they can countersign	I can be countersigning you can be countersigning he 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 he 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 he 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 can't countersign you can't countersign he can't countersign we can't countersign you can't countersign they can't countersign	I can't be countersigning you can't be countersigning he can't be countersigning we can't be countersigning you can't be countersigning they can't be countersigning
Perfeito	Perfeito com V-ing
I can't have countersigned you can't have countersigned he can't have countersigned we can't have countersigned you can't have countersigned they can't have countersigned	I can't have been countersigning you can't have been countersigning he can't have been countersigning we can't have been countersigning you can't have been countersigning they can't have been countersigning

Forma interrogativa

Forma simple	Forma com V-ing
can I countersign? can you countersign? can he countersign? can we countersign? can you countersign? can they countersign?	can I be countersigning? can you be countersigning? can he 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 he 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 he 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't I countersign? can't you countersign? can't he countersign? can't we countersign? can't you countersign? can't they countersign?	can't I be countersigning? can't you be countersigning? can't he be countersigning? can't we be countersigning? can't you be countersigning? can't they be countersigning?
Perfeito	Perfeito com V-ing
can't I have countersigned? can't you have countersigned? can't he have countersigned? can't we have countersigned? can't you have countersigned? can't they have countersigned?	can't I have been countersigning? can't you have been countersigning? can't he have been countersigning? can't we have been countersigning? can't you have been countersigning? can't they have been countersigning?