I could gibber you could gibber he could gibber we could gibber you could gibber they could gibber
Forme en V-ing
I could be gibbering you could be gibbering he could be gibbering we could be gibbering you could be gibbering they could be gibbering
Perfect
I could have gibbered you could have gibbered he could have gibbered we could have gibbered you could have gibbered they could have gibbered
Perfect en V-ing
I could have been gibbering you could have been gibbering he could have been gibbering we could have been gibbering you could have been gibbering they could have been gibbering
Négation
Forme simple
I could not gibber you could not gibber he could not gibber we could not gibber you could not gibber they could not gibber
Forme en V-ing
I could not be gibbering you could not be gibbering he could not be gibbering we could not be gibbering you could not be gibbering they could not be gibbering
Perfect
I could not have gibbered you could not have gibbered he could not have gibbered we could not have gibbered you could not have gibbered they could not have gibbered
Perfect en V-ing
I could not have been gibbering you could not have been gibbering he could not have been gibbering we could not have been gibbering you could not have been gibbering they could not have been gibbering
Forme interrogative
Forme simple
could I gibber? could you gibber? could he gibber? could we gibber? could you gibber? could they gibber?
Forme en V-ing
could I be gibbering? could you be gibbering? could he be gibbering? could we be gibbering? could you be gibbering? could they be gibbering?
Perfect
could I have gibbered? could you have gibbered? could he have gibbered? could we have gibbered? could you have gibbered? could they have gibbered?
Perfect en V-ing
could I have been gibbering? could you have been gibbering? could he have been gibbering? could we have been gibbering? could you have been gibbering? could they have been gibbering?
Forme interro-négative
Forme simple
could I not gibber? could you not gibber? could he not gibber? could we not gibber? could you not gibber? could they not gibber?
Forme en V-ing
could I not be gibbering? could you not be gibbering? could he not be gibbering? could we not be gibbering? could you not be gibbering? could they not be gibbering?
Perfect
could I not have gibbered? could you not have gibbered? could he not have gibbered? could we not have gibbered? could you not have gibbered? could they not have gibbered?
Perfect en V-ing
could I not have been gibbering? could you not have been gibbering? could he not have been gibbering? could we not have been gibbering? could you not have been gibbering? could they not have been gibbering?