I could slither you could slither he could slither we could slither you could slither they could slither
Forme en V-ing
I could be slithering you could be slithering he could be slithering we could be slithering you could be slithering they could be slithering
Perfect
I could have slithered you could have slithered he could have slithered we could have slithered you could have slithered they could have slithered
Perfect en V-ing
I could have been slithering you could have been slithering he could have been slithering we could have been slithering you could have been slithering they could have been slithering
Négation
Forme simple
I couldn't slither you couldn't slither he couldn't slither we couldn't slither you couldn't slither they couldn't slither
Forme en V-ing
I couldn't be slithering you couldn't be slithering he couldn't be slithering we couldn't be slithering you couldn't be slithering they couldn't be slithering
Perfect
I couldn't have slithered you couldn't have slithered he couldn't have slithered we couldn't have slithered you couldn't have slithered they couldn't have slithered
Perfect en V-ing
I couldn't have been slithering you couldn't have been slithering he couldn't have been slithering we couldn't have been slithering you couldn't have been slithering they couldn't have been slithering
Forme interrogative
Forme simple
could I slither? could you slither? could he slither? could we slither? could you slither? could they slither?
Forme en V-ing
could I be slithering? could you be slithering? could he be slithering? could we be slithering? could you be slithering? could they be slithering?
Perfect
could I have slithered? could you have slithered? could he have slithered? could we have slithered? could you have slithered? could they have slithered?
Perfect en V-ing
could I have been slithering? could you have been slithering? could he have been slithering? could we have been slithering? could you have been slithering? could they have been slithering?
Forme interro-négative
Forme simple
couldn't I slither? couldn't you slither? couldn't he slither? couldn't we slither? couldn't you slither? couldn't they slither?
Forme en V-ing
couldn't I be slithering? couldn't you be slithering? couldn't he be slithering? couldn't we be slithering? couldn't you be slithering? couldn't they be slithering?
Perfect
couldn't I have slithered? couldn't you have slithered? couldn't he have slithered? couldn't we have slithered? couldn't you have slithered? couldn't they have slithered?
Perfect en V-ing
couldn't I have been slithering? couldn't you have been slithering? couldn't he have been slithering? couldn't we have been slithering? couldn't you have been slithering? couldn't they have been slithering?