Conjugación del verbo inglés
COULD AUTHENTICATE

Verbo regular: authenticate - authenticated - authenticated

Afirmación

Forma simple	Forma con V-ing
I could authenticate you could authenticate she could authenticate we could authenticate you could authenticate they could authenticate	I could be authenticating you could be authenticating she could be authenticating we could be authenticating you could be authenticating they could be authenticating
Perfecto	Perfecto con V-ing
I could have authenticated you could have authenticated she could have authenticated we could have authenticated you could have authenticated they could have authenticated	I could have been authenticating you could have been authenticating she could have been authenticating we could have been authenticating you could have been authenticating they could have been authenticating

Negación

Forma simple	Forma con V-ing
I could not authenticate you could not authenticate she could not authenticate we could not authenticate you could not authenticate they could not authenticate	I could not be authenticating you could not be authenticating she could not be authenticating we could not be authenticating you could not be authenticating they could not be authenticating
Perfecto	Perfecto con V-ing
I could not have authenticated you could not have authenticated she could not have authenticated we could not have authenticated you could not have authenticated they could not have authenticated	I could not have been authenticating you could not have been authenticating she could not have been authenticating we could not have been authenticating you could not have been authenticating they could not have been authenticating

Forma interrogativa

Forma simple	Forma con V-ing
could I authenticate? could you authenticate? could she authenticate? could we authenticate? could you authenticate? could they authenticate?	could I be authenticating? could you be authenticating? could she be authenticating? could we be authenticating? could you be authenticating? could they be authenticating?
Perfecto	Perfecto con V-ing
could I have authenticated? could you have authenticated? could she have authenticated? could we have authenticated? could you have authenticated? could they have authenticated?	could I have been authenticating? could you have been authenticating? could she have been authenticating? could we have been authenticating? could you have been authenticating? could they have been authenticating?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not authenticate? could you not authenticate? could she not authenticate? could we not authenticate? could you not authenticate? could they not authenticate?	could I not be authenticating? could you not be authenticating? could she not be authenticating? could we not be authenticating? could you not be authenticating? could they not be authenticating?
Perfecto	Perfecto con V-ing
could I not have authenticated? could you not have authenticated? could she not have authenticated? could we not have authenticated? could you not have authenticated? could they not have authenticated?	could I not have been authenticating? could you not have been authenticating? could she not have been authenticating? could we not have been authenticating? could you not have been authenticating? could they not have been authenticating?