Conjugación del verbo inglés
COULD DOUBT

Verbo regular: doubt - doubted - doubted

Afirmación

Forma simple	Forma con V-ing
I could doubt you could doubt she could doubt we could doubt you could doubt they could doubt	I could be doubting you could be doubting she could be doubting we could be doubting you could be doubting they could be doubting
Perfecto	Perfecto con V-ing
I could have doubted you could have doubted she could have doubted we could have doubted you could have doubted they could have doubted	I could have been doubting you could have been doubting she could have been doubting we could have been doubting you could have been doubting they could have been doubting

Negación

Forma simple	Forma con V-ing
I could not doubt you could not doubt she could not doubt we could not doubt you could not doubt they could not doubt	I could not be doubting you could not be doubting she could not be doubting we could not be doubting you could not be doubting they could not be doubting
Perfecto	Perfecto con V-ing
I could not have doubted you could not have doubted she could not have doubted we could not have doubted you could not have doubted they could not have doubted	I could not have been doubting you could not have been doubting she could not have been doubting we could not have been doubting you could not have been doubting they could not have been doubting

Forma interrogativa

Forma simple	Forma con V-ing
could I doubt? could you doubt? could she doubt? could we doubt? could you doubt? could they doubt?	could I be doubting? could you be doubting? could she be doubting? could we be doubting? could you be doubting? could they be doubting?
Perfecto	Perfecto con V-ing
could I have doubted? could you have doubted? could she have doubted? could we have doubted? could you have doubted? could they have doubted?	could I have been doubting? could you have been doubting? could she have been doubting? could we have been doubting? could you have been doubting? could they have been doubting?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not doubt? could you not doubt? could she not doubt? could we not doubt? could you not doubt? could they not doubt?	could I not be doubting? could you not be doubting? could she not be doubting? could we not be doubting? could you not be doubting? could they not be doubting?
Perfecto	Perfecto con V-ing
could I not have doubted? could you not have doubted? could she not have doubted? could we not have doubted? could you not have doubted? could they not have doubted?	could I not have been doubting? could you not have been doubting? could she not have been doubting? could we not have been doubting? could you not have been doubting? could they not have been doubting?