I could gibber you could gibber he could gibber we could gibber you could gibber they could gibber
Forma con 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
Perfecto
I could have gibbered you could have gibbered he could have gibbered we could have gibbered you could have gibbered they could have gibbered
Perfecto con 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
Negación
Forma simple
I couldn't gibber you couldn't gibber he couldn't gibber we couldn't gibber you couldn't gibber they couldn't gibber
Forma con V-ing
I couldn't be gibbering you couldn't be gibbering he couldn't be gibbering we couldn't be gibbering you couldn't be gibbering they couldn't be gibbering
Perfecto
I couldn't have gibbered you couldn't have gibbered he couldn't have gibbered we couldn't have gibbered you couldn't have gibbered they couldn't have gibbered
Perfecto con V-ing
I couldn't have been gibbering you couldn't have been gibbering he couldn't have been gibbering we couldn't have been gibbering you couldn't have been gibbering they couldn't have been gibbering
Forma interrogativa
Forma simple
could I gibber? could you gibber? could he gibber? could we gibber? could you gibber? could they gibber?
Forma con 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?
Perfecto
could I have gibbered? could you have gibbered? could he have gibbered? could we have gibbered? could you have gibbered? could they have gibbered?
Perfecto con 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?
Forma interro-negativa
Forma simple
couldn't I gibber? couldn't you gibber? couldn't he gibber? couldn't we gibber? couldn't you gibber? couldn't they gibber?
Forma con V-ing
couldn't I be gibbering? couldn't you be gibbering? couldn't he be gibbering? couldn't we be gibbering? couldn't you be gibbering? couldn't they be gibbering?
Perfecto
couldn't I have gibbered? couldn't you have gibbered? couldn't he have gibbered? couldn't we have gibbered? couldn't you have gibbered? couldn't they have gibbered?
Perfecto con V-ing
couldn't I have been gibbering? couldn't you have been gibbering? couldn't he have been gibbering? couldn't we have been gibbering? couldn't you have been gibbering? couldn't they have been gibbering?