I could preformulate you could preformulate he could preformulate we could preformulate you could preformulate they could preformulate
Forme en V-ing
I could be preformulating you could be preformulating he could be preformulating we could be preformulating you could be preformulating they could be preformulating
Perfect
I could have preformulated you could have preformulated he could have preformulated we could have preformulated you could have preformulated they could have preformulated
Perfect en V-ing
I could have been preformulating you could have been preformulating he could have been preformulating we could have been preformulating you could have been preformulating they could have been preformulating
Négation
Forme simple
I could not preformulate you could not preformulate he could not preformulate we could not preformulate you could not preformulate they could not preformulate
Forme en V-ing
I could not be preformulating you could not be preformulating he could not be preformulating we could not be preformulating you could not be preformulating they could not be preformulating
Perfect
I could not have preformulated you could not have preformulated he could not have preformulated we could not have preformulated you could not have preformulated they could not have preformulated
Perfect en V-ing
I could not have been preformulating you could not have been preformulating he could not have been preformulating we could not have been preformulating you could not have been preformulating they could not have been preformulating
Forme interrogative
Forme simple
could I preformulate? could you preformulate? could he preformulate? could we preformulate? could you preformulate? could they preformulate?
Forme en V-ing
could I be preformulating? could you be preformulating? could he be preformulating? could we be preformulating? could you be preformulating? could they be preformulating?
Perfect
could I have preformulated? could you have preformulated? could he have preformulated? could we have preformulated? could you have preformulated? could they have preformulated?
Perfect en V-ing
could I have been preformulating? could you have been preformulating? could he have been preformulating? could we have been preformulating? could you have been preformulating? could they have been preformulating?
Forme interro-négative
Forme simple
could I not preformulate? could you not preformulate? could he not preformulate? could we not preformulate? could you not preformulate? could they not preformulate?
Forme en V-ing
could I not be preformulating? could you not be preformulating? could he not be preformulating? could we not be preformulating? could you not be preformulating? could they not be preformulating?
Perfect
could I not have preformulated? could you not have preformulated? could he not have preformulated? could we not have preformulated? could you not have preformulated? could they not have preformulated?
Perfect en V-ing
could I not have been preformulating? could you not have been preformulating? could he not have been preformulating? could we not have been preformulating? could you not have been preformulating? could they not have been preformulating?