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 couldn't cipher you couldn't cipher she couldn't cipher we couldn't cipher you couldn't cipher they couldn't cipher	I couldn't be ciphering you couldn't be ciphering she couldn't be ciphering we couldn't be ciphering you couldn't be ciphering they couldn't be ciphering
Perfect	V-ing perfect
I couldn't have ciphered you couldn't have ciphered she couldn't have ciphered we couldn't have ciphered you couldn't have ciphered they couldn't have ciphered	I couldn't have been ciphering you couldn't have been ciphering she couldn't have been ciphering we couldn't have been ciphering you couldn't have been ciphering they couldn't 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
couldn't I cipher? couldn't you cipher? couldn't she cipher? couldn't we cipher? couldn't you cipher? couldn't they cipher?	couldn't I be ciphering? couldn't you be ciphering? couldn't she be ciphering? couldn't we be ciphering? couldn't you be ciphering? couldn't they be ciphering?
Perfect	V-ing perfect
couldn't I have ciphered? couldn't you have ciphered? couldn't she have ciphered? couldn't we have ciphered? couldn't you have ciphered? couldn't they have ciphered?	couldn't I have been ciphering? couldn't you have been ciphering? couldn't she have been ciphering? couldn't we have been ciphering? couldn't you have been ciphering? couldn't they have been ciphering?