Conjugación del verbo inglés
COULD UPHOLD

Verbo irregular: uphold - upheld - upheld

Afirmación

Forma simple	Forma con V-ing
I could uphold you could uphold he could uphold we could uphold you could uphold they could uphold	I could be upholding you could be upholding he could be upholding we could be upholding you could be upholding they could be upholding
Perfecto	Perfecto con V-ing
I could have upheld you could have upheld he could have upheld we could have upheld you could have upheld they could have upheld	I could have been upholding you could have been upholding he could have been upholding we could have been upholding you could have been upholding they could have been upholding

Negación

Forma simple	Forma con V-ing
I could not uphold you could not uphold he could not uphold we could not uphold you could not uphold they could not uphold	I could not be upholding you could not be upholding he could not be upholding we could not be upholding you could not be upholding they could not be upholding
Perfecto	Perfecto con V-ing
I could not have upheld you could not have upheld he could not have upheld we could not have upheld you could not have upheld they could not have upheld	I could not have been upholding you could not have been upholding he could not have been upholding we could not have been upholding you could not have been upholding they could not have been upholding

Forma interrogativa

Forma simple	Forma con V-ing
could I uphold? could you uphold? could he uphold? could we uphold? could you uphold? could they uphold?	could I be upholding? could you be upholding? could he be upholding? could we be upholding? could you be upholding? could they be upholding?
Perfecto	Perfecto con V-ing
could I have upheld? could you have upheld? could he have upheld? could we have upheld? could you have upheld? could they have upheld?	could I have been upholding? could you have been upholding? could he have been upholding? could we have been upholding? could you have been upholding? could they have been upholding?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not uphold? could you not uphold? could he not uphold? could we not uphold? could you not uphold? could they not uphold?	could I not be upholding? could you not be upholding? could he not be upholding? could we not be upholding? could you not be upholding? could they not be upholding?
Perfecto	Perfecto con V-ing
could I not have upheld? could you not have upheld? could he not have upheld? could we not have upheld? could you not have upheld? could they not have upheld?	could I not have been upholding? could you not have been upholding? could he not have been upholding? could we not have been upholding? could you not have been upholding? could they not have been upholding?