Conjugación del verbo inglés
COULD SUB

Verbo regular: sub - subbed - subbed

Afirmación

Forma simple	Forma con V-ing
I could sub you could sub she could sub we could sub you could sub they could sub	I could be subbing you could be subbing she could be subbing we could be subbing you could be subbing they could be subbing
Perfecto	Perfecto con V-ing
I could have subbed you could have subbed she could have subbed we could have subbed you could have subbed they could have subbed	I could have been subbing you could have been subbing she could have been subbing we could have been subbing you could have been subbing they could have been subbing

Negación

Forma simple	Forma con V-ing
I could not sub you could not sub she could not sub we could not sub you could not sub they could not sub	I could not be subbing you could not be subbing she could not be subbing we could not be subbing you could not be subbing they could not be subbing
Perfecto	Perfecto con V-ing
I could not have subbed you could not have subbed she could not have subbed we could not have subbed you could not have subbed they could not have subbed	I could not have been subbing you could not have been subbing she could not have been subbing we could not have been subbing you could not have been subbing they could not have been subbing

Forma interrogativa

Forma simple	Forma con V-ing
could I sub? could you sub? could she sub? could we sub? could you sub? could they sub?	could I be subbing? could you be subbing? could she be subbing? could we be subbing? could you be subbing? could they be subbing?
Perfecto	Perfecto con V-ing
could I have subbed? could you have subbed? could she have subbed? could we have subbed? could you have subbed? could they have subbed?	could I have been subbing? could you have been subbing? could she have been subbing? could we have been subbing? could you have been subbing? could they have been subbing?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not sub? could you not sub? could she not sub? could we not sub? could you not sub? could they not sub?	could I not be subbing? could you not be subbing? could she not be subbing? could we not be subbing? could you not be subbing? could they not be subbing?
Perfecto	Perfecto con V-ing
could I not have subbed? could you not have subbed? could she not have subbed? could we not have subbed? could you not have subbed? could they not have subbed?	could I not have been subbing? could you not have been subbing? could she not have been subbing? could we not have been subbing? could you not have been subbing? could they not have been subbing?