I could double you could double he could double we could double you could double they could double
Forme en V-ing
I could be doubling you could be doubling he could be doubling we could be doubling you could be doubling they could be doubling
Perfect
I could have doubled you could have doubled he could have doubled we could have doubled you could have doubled they could have doubled
Perfect en V-ing
I could have been doubling you could have been doubling he could have been doubling we could have been doubling you could have been doubling they could have been doubling
Négation
Forme simple
I could not double you could not double he could not double we could not double you could not double they could not double
Forme en V-ing
I could not be doubling you could not be doubling he could not be doubling we could not be doubling you could not be doubling they could not be doubling
Perfect
I could not have doubled you could not have doubled he could not have doubled we could not have doubled you could not have doubled they could not have doubled
Perfect en V-ing
I could not have been doubling you could not have been doubling he could not have been doubling we could not have been doubling you could not have been doubling they could not have been doubling
Forme interrogative
Forme simple
could I double? could you double? could he double? could we double? could you double? could they double?
Forme en V-ing
could I be doubling? could you be doubling? could he be doubling? could we be doubling? could you be doubling? could they be doubling?
Perfect
could I have doubled? could you have doubled? could he have doubled? could we have doubled? could you have doubled? could they have doubled?
Perfect en V-ing
could I have been doubling? could you have been doubling? could he have been doubling? could we have been doubling? could you have been doubling? could they have been doubling?
Forme interro-négative
Forme simple
could I not double? could you not double? could he not double? could we not double? could you not double? could they not double?
Forme en V-ing
could I not be doubling? could you not be doubling? could he not be doubling? could we not be doubling? could you not be doubling? could they not be doubling?
Perfect
could I not have doubled? could you not have doubled? could he not have doubled? could we not have doubled? could you not have doubled? could they not have doubled?
Perfect en V-ing
could I not have been doubling? could you not have been doubling? could he not have been doubling? could we not have been doubling? could you not have been doubling? could they not have been doubling?