could undo
Verbe irrégulier : undo - undid- undone
Traduction française : défaire - annuler 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could undo
you could undo
she could undo
we could undo
you could undo
they could undo 	I could be undoing
you could be undoing
she could be undoing
we could be undoing
you could be undoing
they could be undoing	I could have undone
you could have undone
she could have undone
we could have undone
you could have undone
they could have undone	I could have been undoing
you could have been undoing
she could have been undoing
we could have been undoing
you could have been undoing
they could have been undoing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't undo
you couldn't undo
she couldn't undo
we couldn't undo
you couldn't undo
they couldn't undo 	I couldn't be undoing
you couldn't be undoing
she couldn't be undoing
we couldn't be undoing
you couldn't be undoing
they couldn't be undoing	I couldn't have undone
you couldn't have undone
she couldn't have undone
we couldn't have undone
you couldn't have undone
they couldn't have undone	I couldn't have been undoing
you couldn't have been undoing
she couldn't have been undoing
we couldn't have been undoing
you couldn't have been undoing
they couldn't have been undoing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I undo?
could you undo?
could she undo?
could we undo?
could you undo?
could they undo? 	could I be undoing?
could you be undoing?
could she be undoing?
could we be undoing?
could you be undoing?
could they be undoing? 	could I have undone?
could you have undone?
could she have undone?
could we have undone?
could you have undone?
could they have undone? 	could I have been undoing?
could you have been undoing?
could she have been undoing?
could we have been undoing?
could you have been undoing?
could they have been undoing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I undo?
couldn't you undo?
couldn't she undo?
couldn't we undo?
couldn't you undo?
couldn't they undo? 	couldn't I be undoing?
couldn't you be undoing?
couldn't she be undoing?
couldn't we be undoing?
couldn't you be undoing?
couldn't they be undoing? 	couldn't I have undone?
couldn't you have undone?
couldn't she have undone?
couldn't we have undone?
couldn't you have undone?
couldn't they have undone? 	couldn't I have been undoing?
couldn't you have been undoing?
couldn't she have been undoing?
couldn't we have been undoing?
couldn't you have been undoing?
couldn't they have been undoing?