I could puncture you could puncture he could puncture we could puncture you could puncture they could puncture
Forme en V-ing
I could be puncturing you could be puncturing he could be puncturing we could be puncturing you could be puncturing they could be puncturing
Perfect
I could have punctured you could have punctured he could have punctured we could have punctured you could have punctured they could have punctured
Perfect en V-ing
I could have been puncturing you could have been puncturing he could have been puncturing we could have been puncturing you could have been puncturing they could have been puncturing
Négation
Forme simple
I could not puncture you could not puncture he could not puncture we could not puncture you could not puncture they could not puncture
Forme en V-ing
I could not be puncturing you could not be puncturing he could not be puncturing we could not be puncturing you could not be puncturing they could not be puncturing
Perfect
I could not have punctured you could not have punctured he could not have punctured we could not have punctured you could not have punctured they could not have punctured
Perfect en V-ing
I could not have been puncturing you could not have been puncturing he could not have been puncturing we could not have been puncturing you could not have been puncturing they could not have been puncturing
Forme interrogative
Forme simple
could I puncture? could you puncture? could he puncture? could we puncture? could you puncture? could they puncture?
Forme en V-ing
could I be puncturing? could you be puncturing? could he be puncturing? could we be puncturing? could you be puncturing? could they be puncturing?
Perfect
could I have punctured? could you have punctured? could he have punctured? could we have punctured? could you have punctured? could they have punctured?
Perfect en V-ing
could I have been puncturing? could you have been puncturing? could he have been puncturing? could we have been puncturing? could you have been puncturing? could they have been puncturing?
Forme interro-négative
Forme simple
could I not puncture? could you not puncture? could he not puncture? could we not puncture? could you not puncture? could they not puncture?
Forme en V-ing
could I not be puncturing? could you not be puncturing? could he not be puncturing? could we not be puncturing? could you not be puncturing? could they not be puncturing?
Perfect
could I not have punctured? could you not have punctured? could he not have punctured? could we not have punctured? could you not have punctured? could they not have punctured?
Perfect en V-ing
could I not have been puncturing? could you not have been puncturing? could he not have been puncturing? could we not have been puncturing? could you not have been puncturing? could they not have been puncturing?