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