I can blither you can blither he can blither we can blither you can blither they can blither
V-ing form
I can be blithering you can be blithering he can be blithering we can be blithering you can be blithering they can be blithering
Perfect
I can have blithered you can have blithered he can have blithered we can have blithered you can have blithered they can have blithered
V-ing perfect
I can have been blithering you can have been blithering he can have been blithering we can have been blithering you can have been blithering they can have been blithering
Negation
Simple form
I cannot blither you cannot blither he cannot blither we cannot blither you cannot blither they cannot blither
V-ing form
I cannot be blithering you cannot be blithering he cannot be blithering we cannot be blithering you cannot be blithering they cannot be blithering
Perfect
I cannot have blithered you cannot have blithered he cannot have blithered we cannot have blithered you cannot have blithered they cannot have blithered
V-ing perfect
I cannot have been blithering you cannot have been blithering he cannot have been blithering we cannot have been blithering you cannot have been blithering they cannot have been blithering
Interrogative form
Simple form
can I blither? can you blither? can he blither? can we blither? can you blither? can they blither?
V-ing form
can I be blithering? can you be blithering? can he be blithering? can we be blithering? can you be blithering? can they be blithering?
Perfect
can I have blithered? can you have blithered? can he have blithered? can we have blithered? can you have blithered? can they have blithered?
V-ing perfect
can I have been blithering? can you have been blithering? can he have been blithering? can we have been blithering? can you have been blithering? can they have been blithering?
Interro-negative form
Simple form
can I not blither? can you not blither? can he not blither? can we not blither? can you not blither? can they not blither?
V-ing form
can I not be blithering? can you not be blithering? can he not be blithering? can we not be blithering? can you not be blithering? can they not be blithering?
Perfect
can I not have blithered? can you not have blithered? can he not have blithered? can we not have blithered? can you not have blithered? can they not have blithered?
V-ing perfect
can I not have been blithering? can you not have been blithering? can he not have been blithering? can we not have been blithering? can you not have been blithering? can they not have been blithering?