Conjugaison du verbe anglais
COULD UPSTAGE

Verbe régulier : upstage - upstaged - upstaged
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Affirmation

Forme simple	Forme en V-ing
I could upstage you could upstage he could upstage we could upstage you could upstage they could upstage	I could be upstaging you could be upstaging he could be upstaging we could be upstaging you could be upstaging they could be upstaging
Perfect	Perfect en V-ing
I could have upstaged you could have upstaged he could have upstaged we could have upstaged you could have upstaged they could have upstaged	I could have been upstaging you could have been upstaging he could have been upstaging we could have been upstaging you could have been upstaging they could have been upstaging

Négation

Forme simple	Forme en V-ing
I could not upstage you could not upstage he could not upstage we could not upstage you could not upstage they could not upstage	I could not be upstaging you could not be upstaging he could not be upstaging we could not be upstaging you could not be upstaging they could not be upstaging
Perfect	Perfect en V-ing
I could not have upstaged you could not have upstaged he could not have upstaged we could not have upstaged you could not have upstaged they could not have upstaged	I could not have been upstaging you could not have been upstaging he could not have been upstaging we could not have been upstaging you could not have been upstaging they could not have been upstaging

Forme interrogative

Forme simple	Forme en V-ing
could I upstage? could you upstage? could he upstage? could we upstage? could you upstage? could they upstage?	could I be upstaging? could you be upstaging? could he be upstaging? could we be upstaging? could you be upstaging? could they be upstaging?
Perfect	Perfect en V-ing
could I have upstaged? could you have upstaged? could he have upstaged? could we have upstaged? could you have upstaged? could they have upstaged?	could I have been upstaging? could you have been upstaging? could he have been upstaging? could we have been upstaging? could you have been upstaging? could they have been upstaging?

Forme interro-négative

Forme simple	Forme en V-ing
could I not upstage? could you not upstage? could he not upstage? could we not upstage? could you not upstage? could they not upstage?	could I not be upstaging? could you not be upstaging? could he not be upstaging? could we not be upstaging? could you not be upstaging? could they not be upstaging?
Perfect	Perfect en V-ing
could I not have upstaged? could you not have upstaged? could he not have upstaged? could we not have upstaged? could you not have upstaged? could they not have upstaged?	could I not have been upstaging? could you not have been upstaging? could he not have been upstaging? could we not have been upstaging? could you not have been upstaging? could they not have been upstaging?