I could dither you could dither he could dither we could dither you could dither they could dither
V-ing form
I could be dithering you could be dithering he could be dithering we could be dithering you could be dithering they could be dithering
Perfect
I could have dithered you could have dithered he could have dithered we could have dithered you could have dithered they could have dithered
V-ing perfect
I could have been dithering you could have been dithering he could have been dithering we could have been dithering you could have been dithering they could have been dithering
Negation
Simple form
I could not dither you could not dither he could not dither we could not dither you could not dither they could not dither
V-ing form
I could not be dithering you could not be dithering he could not be dithering we could not be dithering you could not be dithering they could not be dithering
Perfect
I could not have dithered you could not have dithered he could not have dithered we could not have dithered you could not have dithered they could not have dithered
V-ing perfect
I could not have been dithering you could not have been dithering he could not have been dithering we could not have been dithering you could not have been dithering they could not have been dithering
Interrogative form
Simple form
could I dither? could you dither? could he dither? could we dither? could you dither? could they dither?
V-ing form
could I be dithering? could you be dithering? could he be dithering? could we be dithering? could you be dithering? could they be dithering?
Perfect
could I have dithered? could you have dithered? could he have dithered? could we have dithered? could you have dithered? could they have dithered?
V-ing perfect
could I have been dithering? could you have been dithering? could he have been dithering? could we have been dithering? could you have been dithering? could they have been dithering?
Interro-negative form
Simple form
could I not dither? could you not dither? could he not dither? could we not dither? could you not dither? could they not dither?
V-ing form
could I not be dithering? could you not be dithering? could he not be dithering? could we not be dithering? could you not be dithering? could they not be dithering?
Perfect
could I not have dithered? could you not have dithered? could he not have dithered? could we not have dithered? could you not have dithered? could they not have dithered?
V-ing perfect
could I not have been dithering? could you not have been dithering? could he not have been dithering? could we not have been dithering? could you not have been dithering? could they not have been dithering?