I could contaminate you could contaminate he could contaminate we could contaminate you could contaminate they could contaminate
Forme en V-ing
I could be contaminating you could be contaminating he could be contaminating we could be contaminating you could be contaminating they could be contaminating
Perfect
I could have contaminated you could have contaminated he could have contaminated we could have contaminated you could have contaminated they could have contaminated
Perfect en V-ing
I could have been contaminating you could have been contaminating he could have been contaminating we could have been contaminating you could have been contaminating they could have been contaminating
Négation
Forme simple
I could not contaminate you could not contaminate he could not contaminate we could not contaminate you could not contaminate they could not contaminate
Forme en V-ing
I could not be contaminating you could not be contaminating he could not be contaminating we could not be contaminating you could not be contaminating they could not be contaminating
Perfect
I could not have contaminated you could not have contaminated he could not have contaminated we could not have contaminated you could not have contaminated they could not have contaminated
Perfect en V-ing
I could not have been contaminating you could not have been contaminating he could not have been contaminating we could not have been contaminating you could not have been contaminating they could not have been contaminating
Forme interrogative
Forme simple
could I contaminate? could you contaminate? could he contaminate? could we contaminate? could you contaminate? could they contaminate?
Forme en V-ing
could I be contaminating? could you be contaminating? could he be contaminating? could we be contaminating? could you be contaminating? could they be contaminating?
Perfect
could I have contaminated? could you have contaminated? could he have contaminated? could we have contaminated? could you have contaminated? could they have contaminated?
Perfect en V-ing
could I have been contaminating? could you have been contaminating? could he have been contaminating? could we have been contaminating? could you have been contaminating? could they have been contaminating?
Forme interro-négative
Forme simple
could I not contaminate? could you not contaminate? could he not contaminate? could we not contaminate? could you not contaminate? could they not contaminate?
Forme en V-ing
could I not be contaminating? could you not be contaminating? could he not be contaminating? could we not be contaminating? could you not be contaminating? could they not be contaminating?
Perfect
could I not have contaminated? could you not have contaminated? could he not have contaminated? could we not have contaminated? could you not have contaminated? could they not have contaminated?
Perfect en V-ing
could I not have been contaminating? could you not have been contaminating? could he not have been contaminating? could we not have been contaminating? could you not have been contaminating? could they not have been contaminating?