could encipher
Regular verb: encipher - enciphered- enciphered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could encipher
you could encipher
she could encipher
we could encipher
you could encipher
they could encipher 	I could be enciphering
you could be enciphering
she could be enciphering
we could be enciphering
you could be enciphering
they could be enciphering	I could have enciphered
you could have enciphered
she could have enciphered
we could have enciphered
you could have enciphered
they could have enciphered	I could have been enciphering
you could have been enciphering
she could have been enciphering
we could have been enciphering
you could have been enciphering
they could have been enciphering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't encipher
you couldn't encipher
she couldn't encipher
we couldn't encipher
you couldn't encipher
they couldn't encipher 	I couldn't be enciphering
you couldn't be enciphering
she couldn't be enciphering
we couldn't be enciphering
you couldn't be enciphering
they couldn't be enciphering	I couldn't have enciphered
you couldn't have enciphered
she couldn't have enciphered
we couldn't have enciphered
you couldn't have enciphered
they couldn't have enciphered	I couldn't have been enciphering
you couldn't have been enciphering
she couldn't have been enciphering
we couldn't have been enciphering
you couldn't have been enciphering
they couldn't have been enciphering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I encipher?
could you encipher?
could she encipher?
could we encipher?
could you encipher?
could they encipher? 	could I be enciphering?
could you be enciphering?
could she be enciphering?
could we be enciphering?
could you be enciphering?
could they be enciphering? 	could I have enciphered?
could you have enciphered?
could she have enciphered?
could we have enciphered?
could you have enciphered?
could they have enciphered? 	could I have been enciphering?
could you have been enciphering?
could she have been enciphering?
could we have been enciphering?
could you have been enciphering?
could they have been enciphering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I encipher?
couldn't you encipher?
couldn't she encipher?
couldn't we encipher?
couldn't you encipher?
couldn't they encipher? 	couldn't I be enciphering?
couldn't you be enciphering?
couldn't she be enciphering?
couldn't we be enciphering?
couldn't you be enciphering?
couldn't they be enciphering? 	couldn't I have enciphered?
couldn't you have enciphered?
couldn't she have enciphered?
couldn't we have enciphered?
couldn't you have enciphered?
couldn't they have enciphered? 	couldn't I have been enciphering?
couldn't you have been enciphering?
couldn't she have been enciphering?
couldn't we have been enciphering?
couldn't you have been enciphering?
couldn't they have been enciphering?