English verb conjugation
COULD CIPHER

Regular verb: cipher - ciphered - ciphered

Affirmation

Simple form	V-ing form
I could cipher you could cipher she could cipher we could cipher you could cipher they could cipher	I could be ciphering you could be ciphering she could be ciphering we could be ciphering you could be ciphering they could be ciphering
Perfect	V-ing perfect
I could have ciphered you could have ciphered she could have ciphered we could have ciphered you could have ciphered they could have ciphered	I could have been ciphering you could have been ciphering she could have been ciphering we could have been ciphering you could have been ciphering they could have been ciphering

Negation

Simple form	V-ing form
I could not cipher you could not cipher she could not cipher we could not cipher you could not cipher they could not cipher	I could not be ciphering you could not be ciphering she could not be ciphering we could not be ciphering you could not be ciphering they could not be ciphering
Perfect	V-ing perfect
I could not have ciphered you could not have ciphered she could not have ciphered we could not have ciphered you could not have ciphered they could not have ciphered	I could not have been ciphering you could not have been ciphering she could not have been ciphering we could not have been ciphering you could not have been ciphering they could not have been ciphering

Interrogative form

Simple form	V-ing form
could I cipher? could you cipher? could she cipher? could we cipher? could you cipher? could they cipher?	could I be ciphering? could you be ciphering? could she be ciphering? could we be ciphering? could you be ciphering? could they be ciphering?
Perfect	V-ing perfect
could I have ciphered? could you have ciphered? could she have ciphered? could we have ciphered? could you have ciphered? could they have ciphered?	could I have been ciphering? could you have been ciphering? could she have been ciphering? could we have been ciphering? could you have been ciphering? could they have been ciphering?

Interro-negative form

Simple form	V-ing form
could I not cipher? could you not cipher? could she not cipher? could we not cipher? could you not cipher? could they not cipher?	could I not be ciphering? could you not be ciphering? could she not be ciphering? could we not be ciphering? could you not be ciphering? could they not be ciphering?
Perfect	V-ing perfect
could I not have ciphered? could you not have ciphered? could she not have ciphered? could we not have ciphered? could you not have ciphered? could they not have ciphered?	could I not have been ciphering? could you not have been ciphering? could she not have been ciphering? could we not have been ciphering? could you not have been ciphering? could they not have been ciphering?