English verb conjugation
CAN CIPHER

Regular verb: cipher - ciphered - ciphered

Affirmation

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

Negation

Simple form	V-ing form
I can't cipher you can't cipher he can't cipher we can't cipher you can't cipher they can't cipher	I can't be ciphering you can't be ciphering he can't be ciphering we can't be ciphering you can't be ciphering they can't be ciphering
Perfect	V-ing perfect
I can't have ciphered you can't have ciphered he can't have ciphered we can't have ciphered you can't have ciphered they can't have ciphered	I can't have been ciphering you can't have been ciphering he can't have been ciphering we can't have been ciphering you can't have been ciphering they can't have been ciphering

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I cipher? can't you cipher? can't he cipher? can't we cipher? can't you cipher? can't they cipher?	can't I be ciphering? can't you be ciphering? can't he be ciphering? can't we be ciphering? can't you be ciphering? can't they be ciphering?
Perfect	V-ing perfect
can't I have ciphered? can't you have ciphered? can't he have ciphered? can't we have ciphered? can't you have ciphered? can't they have ciphered?	can't I have been ciphering? can't you have been ciphering? can't he have been ciphering? can't we have been ciphering? can't you have been ciphering? can't they have been ciphering?