could upstage
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Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect 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	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 	Perfect 	Perfect en V-ing 	
I couldn't upstage
you couldn't upstage
he couldn't upstage
we couldn't upstage
you couldn't upstage
they couldn't upstage 	I couldn't be upstaging
you couldn't be upstaging
he couldn't be upstaging
we couldn't be upstaging
you couldn't be upstaging
they couldn't be upstaging	I couldn't have upstaged
you couldn't have upstaged
he couldn't have upstaged
we couldn't have upstaged
you couldn't have upstaged
they couldn't have upstaged	I couldn't have been upstaging
you couldn't have been upstaging
he couldn't have been upstaging
we couldn't have been upstaging
you couldn't have been upstaging
they couldn't have been upstaging	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect 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? 	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 	Perfect 	Perfect en V-ing 	
couldn't I upstage?
couldn't you upstage?
couldn't he upstage?
couldn't we upstage?
couldn't you upstage?
couldn't they upstage? 	couldn't I be upstaging?
couldn't you be upstaging?
couldn't he be upstaging?
couldn't we be upstaging?
couldn't you be upstaging?
couldn't they be upstaging? 	couldn't I have upstaged?
couldn't you have upstaged?
couldn't he have upstaged?
couldn't we have upstaged?
couldn't you have upstaged?
couldn't they have upstaged? 	couldn't I have been upstaging?
couldn't you have been upstaging?
couldn't he have been upstaging?
couldn't we have been upstaging?
couldn't you have been upstaging?
couldn't they have been upstaging?